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# babel-types > This module contains methods for building ASTs manually and for checking the types of AST nodes. ## Install ```sh npm install --save-dev babel-types ``` ## API <!-- begin generated section --> ### anyTypeAnnotation ```javascript t.anyTypeAnnotation() ``` See also `t.isAnyTypeAnnotation(node, opts)` and `t.assertAnyTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### arrayExpression ```javascript t.arrayExpression(elements) ``` See also `t.isArrayExpression(node, opts)` and `t.assertArrayExpression(node, opts)`. Aliases: `Expression` - `elements`: `Array<null | Expression | SpreadElement>` (default: `[]`) --- ### arrayPattern ```javascript t.arrayPattern(elements, typeAnnotation) ``` See also `t.isArrayPattern(node, opts)` and `t.assertArrayPattern(node, opts)`. Aliases: `Pattern`, `LVal` - `elements`: `Array<Identifier | Pattern | RestElement>` (required) - `typeAnnotation` (required) - `decorators`: `Array<Decorator>` (default: `null`) --- ### arrayTypeAnnotation ```javascript t.arrayTypeAnnotation(elementType) ``` See also `t.isArrayTypeAnnotation(node, opts)` and `t.assertArrayTypeAnnotation(node, opts)`. Aliases: `Flow` - `elementType` (required) --- ### arrowFunctionExpression ```javascript t.arrowFunctionExpression(params, body, async) ``` See also `t.isArrowFunctionExpression(node, opts)` and `t.assertArrowFunctionExpression(node, opts)`. Aliases: `Scopable`, `Function`, `BlockParent`, `FunctionParent`, `Expression`, `Pureish` - `params`: `Array<LVal>` (required) - `body`: `BlockStatement | Expression` (required) - `async`: `boolean` (default: `false`) - `returnType` (default: `null`) - `typeParameters` (default: `null`) --- ### assignmentExpression ```javascript t.assignmentExpression(operator, left, right) ``` See also `t.isAssignmentExpression(node, opts)` and `t.assertAssignmentExpression(node, opts)`. Aliases: `Expression` - `operator`: `string` (required) - `left`: `LVal` (required) - `right`: `Expression` (required) --- ### assignmentPattern ```javascript t.assignmentPattern(left, right) ``` See also `t.isAssignmentPattern(node, opts)` and `t.assertAssignmentPattern(node, opts)`. Aliases: `Pattern`, `LVal` - `left`: `Identifier` (required) - `right`: `Expression` (required) - `decorators`: `Array<Decorator>` (default: `null`) --- ### awaitExpression ```javascript t.awaitExpression(argument) ``` See also `t.isAwaitExpression(node, opts)` and `t.assertAwaitExpression(node, opts)`. Aliases: `Expression`, `Terminatorless` - `argument`: `Expression` (required) --- ### binaryExpression ```javascript t.binaryExpression(operator, left, right) ``` See also `t.isBinaryExpression(node, opts)` and `t.assertBinaryExpression(node, opts)`. Aliases: `Binary`, `Expression` - `operator`: `'+' | '-' | '/' | '%' | '*' | '**' | '&' | '|' | '>>' | '>>>' | '<<' | '^' | '==' | '===' | '!=' | '!==' | 'in' | 'instanceof' | '>' | '<' | '>=' | '<='` (required) - `left`: `Expression` (required) - `right`: `Expression` (required) --- ### bindExpression ```javascript t.bindExpression(object, callee) ``` See also `t.isBindExpression(node, opts)` and `t.assertBindExpression(node, opts)`. Aliases: `Expression` - `object` (required) - `callee` (required) --- ### blockStatement ```javascript t.blockStatement(body, directives) ``` See also `t.isBlockStatement(node, opts)` and `t.assertBlockStatement(node, opts)`. Aliases: `Scopable`, `BlockParent`, `Block`, `Statement` - `body`: `Array<Statement>` (required) - `directives`: `Array<Directive>` (default: `[]`) --- ### booleanLiteral ```javascript t.booleanLiteral(value) ``` See also `t.isBooleanLiteral(node, opts)` and `t.assertBooleanLiteral(node, opts)`. Aliases: `Expression`, `Pureish`, `Literal`, `Immutable` - `value`: `boolean` (required) --- ### booleanLiteralTypeAnnotation ```javascript t.booleanLiteralTypeAnnotation() ``` See also `t.isBooleanLiteralTypeAnnotation(node, opts)` and `t.assertBooleanLiteralTypeAnnotation(node, opts)`. Aliases: `Flow` --- ### booleanTypeAnnotation ```javascript t.booleanTypeAnnotation() ``` See also `t.isBooleanTypeAnnotation(node, opts)` and `t.assertBooleanTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### breakStatement ```javascript t.breakStatement(label) ``` See also `t.isBreakStatement(node, opts)` and `t.assertBreakStatement(node, opts)`. Aliases: `Statement`, `Terminatorless`, `CompletionStatement` - `label`: `Identifier` (default: `null`) --- ### callExpression ```javascript t.callExpression(callee, arguments) ``` See also `t.isCallExpression(node, opts)` and `t.assertCallExpression(node, opts)`. Aliases: `Expression` - `callee`: `Expression` (required) - `arguments`: `Array<Expression | SpreadElement>` (required) --- ### catchClause ```javascript t.catchClause(param, body) ``` See also `t.isCatchClause(node, opts)` and `t.assertCatchClause(node, opts)`. Aliases: `Scopable` - `param`: `Identifier` (required) - `body`: `BlockStatement` (required) --- ### classBody ```javascript t.classBody(body) ``` See also `t.isClassBody(node, opts)` and `t.assertClassBody(node, opts)`. - `body`: `Array<ClassMethod | ClassProperty>` (required) --- ### classDeclaration ```javascript t.classDeclaration(id, superClass, body, decorators) ``` See also `t.isClassDeclaration(node, opts)` and `t.assertClassDeclaration(node, opts)`. Aliases: `Scopable`, `Class`, `Statement`, `Declaration`, `Pureish` - `id`: `Identifier` (required) - `superClass`: `Expression` (default: `null`) - `body`: `ClassBody` (required) - `decorators`: `Array<Decorator>` (required) - `implements` (default: `null`) - `mixins` (default: `null`) - `superTypeParameters` (default: `null`) - `typeParameters` (default: `null`) --- ### classExpression ```javascript t.classExpression(id, superClass, body, decorators) ``` See also `t.isClassExpression(node, opts)` and `t.assertClassExpression(node, opts)`. Aliases: `Scopable`, `Class`, `Expression`, `Pureish` - `id`: `Identifier` (default: `null`) - `superClass`: `Expression` (default: `null`) - `body`: `ClassBody` (required) - `decorators`: `Array<Decorator>` (required) - `implements` (default: `null`) - `mixins` (default: `null`) - `superTypeParameters` (default: `null`) - `typeParameters` (default: `null`) --- ### classImplements ```javascript t.classImplements(id, typeParameters) ``` See also `t.isClassImplements(node, opts)` and `t.assertClassImplements(node, opts)`. Aliases: `Flow` - `id` (required) - `typeParameters` (required) --- ### classMethod ```javascript t.classMethod(kind, key, params, body, computed, static) ``` See also `t.isClassMethod(node, opts)` and `t.assertClassMethod(node, opts)`. Aliases: `Function`, `Scopable`, `BlockParent`, `FunctionParent`, `Method` - `kind`: `"get" | "set" | "method" | "constructor"` (default: `'method'`) - `key`if computed then `Expression` else `Identifier | Literal` (required) - `params`: `Array<LVal>` (required) - `body`: `BlockStatement` (required) - `computed`: `boolean` (default: `false`) - `static`: `boolean` (default: `false`) - `async`: `boolean` (default: `false`) - `decorators` (default: `null`) - `generator`: `boolean` (default: `false`) - `returnType` (default: `null`) - `typeParameters` (default: `null`) --- ### classProperty ```javascript t.classProperty(key, value, typeAnnotation, decorators, computed) ``` See also `t.isClassProperty(node, opts)` and `t.assertClassProperty(node, opts)`. Aliases: `Property` - `key` (required) - `value` (required) - `typeAnnotation` (required) - `decorators` (required) - `computed`: `boolean` (default: `false`) --- ### conditionalExpression ```javascript t.conditionalExpression(test, consequent, alternate) ``` See also `t.isConditionalExpression(node, opts)` and `t.assertConditionalExpression(node, opts)`. Aliases: `Expression`, `Conditional` - `test`: `Expression` (required) - `consequent`: `Expression` (required) - `alternate`: `Expression` (required) --- ### continueStatement ```javascript t.continueStatement(label) ``` See also `t.isContinueStatement(node, opts)` and `t.assertContinueStatement(node, opts)`. Aliases: `Statement`, `Terminatorless`, `CompletionStatement` - `label`: `Identifier` (default: `null`) --- ### debuggerStatement ```javascript t.debuggerStatement() ``` See also `t.isDebuggerStatement(node, opts)` and `t.assertDebuggerStatement(node, opts)`. Aliases: `Statement` --- ### declareClass ```javascript t.declareClass(id, typeParameters, extends, body) ``` See also `t.isDeclareClass(node, opts)` and `t.assertDeclareClass(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `extends` (required) - `body` (required) --- ### declareExportDeclaration ```javascript t.declareExportDeclaration(declaration, specifiers, source) ``` See also `t.isDeclareExportDeclaration(node, opts)` and `t.assertDeclareExportDeclaration(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `declaration` (required) - `specifiers` (required) - `source` (required) --- ### declareFunction ```javascript t.declareFunction(id) ``` See also `t.isDeclareFunction(node, opts)` and `t.assertDeclareFunction(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) --- ### declareInterface ```javascript t.declareInterface(id, typeParameters, extends, body) ``` See also `t.isDeclareInterface(node, opts)` and `t.assertDeclareInterface(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `extends` (required) - `body` (required) --- ### declareModule ```javascript t.declareModule(id, body) ``` See also `t.isDeclareModule(node, opts)` and `t.assertDeclareModule(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `body` (required) --- ### declareModuleExports ```javascript t.declareModuleExports(typeAnnotation) ``` See also `t.isDeclareModuleExports(node, opts)` and `t.assertDeclareModuleExports(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `typeAnnotation` (required) --- ### declareOpaqueType ```javascript t.declareOpaqueType(id, typeParameters, supertype) ``` See also `t.isDeclareOpaqueType(node, opts)` and `t.assertDeclareOpaqueType(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `supertype` (required) --- ### declareTypeAlias ```javascript t.declareTypeAlias(id, typeParameters, right) ``` See also `t.isDeclareTypeAlias(node, opts)` and `t.assertDeclareTypeAlias(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `right` (required) --- ### declareVariable ```javascript t.declareVariable(id) ``` See also `t.isDeclareVariable(node, opts)` and `t.assertDeclareVariable(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) --- ### decorator ```javascript t.decorator(expression) ``` See also `t.isDecorator(node, opts)` and `t.assertDecorator(node, opts)`. - `expression`: `Expression` (required) --- ### directive ```javascript t.directive(value) ``` See also `t.isDirective(node, opts)` and `t.assertDirective(node, opts)`. - `value`: `DirectiveLiteral` (required) --- ### directiveLiteral ```javascript t.directiveLiteral(value) ``` See also `t.isDirectiveLiteral(node, opts)` and `t.assertDirectiveLiteral(node, opts)`. - `value`: `string` (required) --- ### doExpression ```javascript t.doExpression(body) ``` See also `t.isDoExpression(node, opts)` and `t.assertDoExpression(node, opts)`. Aliases: `Expression` - `body`: `BlockStatement` (required) --- ### doWhileStatement ```javascript t.doWhileStatement(test, body) ``` See also `t.isDoWhileStatement(node, opts)` and `t.assertDoWhileStatement(node, opts)`. Aliases: `Statement`, `BlockParent`, `Loop`, `While`, `Scopable` - `test`: `Expression` (required) - `body`: `Statement` (required) --- ### emptyStatement ```javascript t.emptyStatement() ``` See also `t.isEmptyStatement(node, opts)` and `t.assertEmptyStatement(node, opts)`. Aliases: `Statement` --- ### emptyTypeAnnotation ```javascript t.emptyTypeAnnotation() ``` See also `t.isEmptyTypeAnnotation(node, opts)` and `t.assertEmptyTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### existentialTypeParam ```javascript t.existentialTypeParam() ``` See also `t.isExistentialTypeParam(node, opts)` and `t.assertExistentialTypeParam(node, opts)`. Aliases: `Flow` --- ### exportAllDeclaration ```javascript t.exportAllDeclaration(source) ``` See also `t.isExportAllDeclaration(node, opts)` and `t.assertExportAllDeclaration(node, opts)`. Aliases: `Statement`, `Declaration`, `ModuleDeclaration`, `ExportDeclaration` - `source`: `StringLiteral` (required) --- ### exportDefaultDeclaration ```javascript t.exportDefaultDeclaration(declaration) ``` See also `t.isExportDefaultDeclaration(node, opts)` and `t.assertExportDefaultDeclaration(node, opts)`. Aliases: `Statement`, `Declaration`, `ModuleDeclaration`, `ExportDeclaration` - `declaration`: `FunctionDeclaration | ClassDeclaration | Expression` (required) --- ### exportDefaultSpecifier ```javascript t.exportDefaultSpecifier(exported) ``` See also `t.isExportDefaultSpecifier(node, opts)` and `t.assertExportDefaultSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `exported`: `Identifier` (required) --- ### exportNamedDeclaration ```javascript t.exportNamedDeclaration(declaration, specifiers, source) ``` See also `t.isExportNamedDeclaration(node, opts)` and `t.assertExportNamedDeclaration(node, opts)`. Aliases: `Statement`, `Declaration`, `ModuleDeclaration`, `ExportDeclaration` - `declaration`: `Declaration` (default: `null`) - `specifiers`: `Array<ExportSpecifier>` (required) - `source`: `StringLiteral` (default: `null`) --- ### exportNamespaceSpecifier ```javascript t.exportNamespaceSpecifier(exported) ``` See also `t.isExportNamespaceSpecifier(node, opts)` and `t.assertExportNamespaceSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `exported`: `Identifier` (required) --- ### exportSpecifier ```javascript t.exportSpecifier(local, exported) ``` See also `t.isExportSpecifier(node, opts)` and `t.assertExportSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `local`: `Identifier` (required) - `exported`: `Identifier` (required) --- ### expressionStatement ```javascript t.expressionStatement(expression) ``` See also `t.isExpressionStatement(node, opts)` and `t.assertExpressionStatement(node, opts)`. Aliases: `Statement`, `ExpressionWrapper` - `expression`: `Expression` (required) --- ### file ```javascript t.file(program, comments, tokens) ``` See also `t.isFile(node, opts)` and `t.assertFile(node, opts)`. - `program`: `Program` (required) - `comments` (required) - `tokens` (required) --- ### forAwaitStatement ```javascript t.forAwaitStatement(left, right, body) ``` See also `t.isForAwaitStatement(node, opts)` and `t.assertForAwaitStatement(node, opts)`. Aliases: `Scopable`, `Statement`, `For`, `BlockParent`, `Loop`, `ForXStatement` - `left`: `VariableDeclaration | LVal` (required) - `right`: `Expression` (required) - `body`: `Statement` (required) --- ### forInStatement ```javascript t.forInStatement(left, right, body) ``` See also `t.isForInStatement(node, opts)` and `t.assertForInStatement(node, opts)`. Aliases: `Scopable`, `Statement`, `For`, `BlockParent`, `Loop`, `ForXStatement` - `left`: `VariableDeclaration | LVal` (required) - `right`: `Expression` (required) - `body`: `Statement` (required) --- ### forOfStatement ```javascript t.forOfStatement(left, right, body) ``` See also `t.isForOfStatement(node, opts)` and `t.assertForOfStatement(node, opts)`. Aliases: `Scopable`, `Statement`, `For`, `BlockParent`, `Loop`, `ForXStatement` - `left`: `VariableDeclaration | LVal` (required) - `right`: `Expression` (required) - `body`: `Statement` (required) --- ### forStatement ```javascript t.forStatement(init, test, update, body) ``` See also `t.isForStatement(node, opts)` and `t.assertForStatement(node, opts)`. Aliases: `Scopable`, `Statement`, `For`, `BlockParent`, `Loop` - `init`: `VariableDeclaration | Expression` (default: `null`) - `test`: `Expression` (default: `null`) - `update`: `Expression` (default: `null`) - `body`: `Statement` (required) --- ### functionDeclaration ```javascript t.functionDeclaration(id, params, body, generator, async) ``` See also `t.isFunctionDeclaration(node, opts)` and `t.assertFunctionDeclaration(node, opts)`. Aliases: `Scopable`, `Function`, `BlockParent`, `FunctionParent`, `Statement`, `Pureish`, `Declaration` - `id`: `Identifier` (required) - `params`: `Array<LVal>` (required) - `body`: `BlockStatement` (required) - `generator`: `boolean` (default: `false`) - `async`: `boolean` (default: `false`) - `returnType` (default: `null`) - `typeParameters` (default: `null`) --- ### functionExpression ```javascript t.functionExpression(id, params, body, generator, async) ``` See also `t.isFunctionExpression(node, opts)` and `t.assertFunctionExpression(node, opts)`. Aliases: `Scopable`, `Function`, `BlockParent`, `FunctionParent`, `Expression`, `Pureish` - `id`: `Identifier` (default: `null`) - `params`: `Array<LVal>` (required) - `body`: `BlockStatement` (required) - `generator`: `boolean` (default: `false`) - `async`: `boolean` (default: `false`) - `returnType` (default: `null`) - `typeParameters` (default: `null`) --- ### functionTypeAnnotation ```javascript t.functionTypeAnnotation(typeParameters, params, rest, returnType) ``` See also `t.isFunctionTypeAnnotation(node, opts)` and `t.assertFunctionTypeAnnotation(node, opts)`. Aliases: `Flow` - `typeParameters` (required) - `params` (required) - `rest` (required) - `returnType` (required) --- ### functionTypeParam ```javascript t.functionTypeParam(name, typeAnnotation) ``` See also `t.isFunctionTypeParam(node, opts)` and `t.assertFunctionTypeParam(node, opts)`. Aliases: `Flow` - `name` (required) - `typeAnnotation` (required) --- ### genericTypeAnnotation ```javascript t.genericTypeAnnotation(id, typeParameters) ``` See also `t.isGenericTypeAnnotation(node, opts)` and `t.assertGenericTypeAnnotation(node, opts)`. Aliases: `Flow` - `id` (required) - `typeParameters` (required) --- ### identifier ```javascript t.identifier(name) ``` See also `t.isIdentifier(node, opts)` and `t.assertIdentifier(node, opts)`. Aliases: `Expression`, `LVal` - `name``string` (required) - `decorators`: `Array<Decorator>` (default: `null`) - `typeAnnotation` (default: `null`) --- ### ifStatement ```javascript t.ifStatement(test, consequent, alternate) ``` See also `t.isIfStatement(node, opts)` and `t.assertIfStatement(node, opts)`. Aliases: `Statement`, `Conditional` - `test`: `Expression` (required) - `consequent`: `Statement` (required) - `alternate`: `Statement` (default: `null`) --- ### import ```javascript t.import() ``` See also `t.isImport(node, opts)` and `t.assertImport(node, opts)`. Aliases: `Expression` --- ### importDeclaration ```javascript t.importDeclaration(specifiers, source) ``` See also `t.isImportDeclaration(node, opts)` and `t.assertImportDeclaration(node, opts)`. Aliases: `Statement`, `Declaration`, `ModuleDeclaration` - `specifiers`: `Array<ImportSpecifier | ImportDefaultSpecifier | ImportNamespaceSpecifier>` (required) - `source`: `StringLiteral` (required) --- ### importDefaultSpecifier ```javascript t.importDefaultSpecifier(local) ``` See also `t.isImportDefaultSpecifier(node, opts)` and `t.assertImportDefaultSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `local`: `Identifier` (required) --- ### importNamespaceSpecifier ```javascript t.importNamespaceSpecifier(local) ``` See also `t.isImportNamespaceSpecifier(node, opts)` and `t.assertImportNamespaceSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `local`: `Identifier` (required) --- ### importSpecifier ```javascript t.importSpecifier(local, imported) ``` See also `t.isImportSpecifier(node, opts)` and `t.assertImportSpecifier(node, opts)`. Aliases: `ModuleSpecifier` - `local`: `Identifier` (required) - `imported`: `Identifier` (required) - `importKind`: `null | 'type' | 'typeof'` (default: `null`) --- ### interfaceDeclaration ```javascript t.interfaceDeclaration(id, typeParameters, extends, body) ``` See also `t.isInterfaceDeclaration(node, opts)` and `t.assertInterfaceDeclaration(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `extends` (required) - `body` (required) --- ### interfaceExtends ```javascript t.interfaceExtends(id, typeParameters) ``` See also `t.isInterfaceExtends(node, opts)` and `t.assertInterfaceExtends(node, opts)`. Aliases: `Flow` - `id` (required) - `typeParameters` (required) --- ### intersectionTypeAnnotation ```javascript t.intersectionTypeAnnotation(types) ``` See also `t.isIntersectionTypeAnnotation(node, opts)` and `t.assertIntersectionTypeAnnotation(node, opts)`. Aliases: `Flow` - `types` (required) --- ### jSXAttribute ```javascript t.jSXAttribute(name, value) ``` See also `t.isJSXAttribute(node, opts)` and `t.assertJSXAttribute(node, opts)`. Aliases: `JSX`, `Immutable` - `name`: `JSXIdentifier | JSXNamespacedName` (required) - `value`: `JSXElement | StringLiteral | JSXExpressionContainer` (default: `null`) --- ### jSXClosingElement ```javascript t.jSXClosingElement(name) ``` See also `t.isJSXClosingElement(node, opts)` and `t.assertJSXClosingElement(node, opts)`. Aliases: `JSX`, `Immutable` - `name`: `JSXIdentifier | JSXMemberExpression` (required) --- ### jSXElement ```javascript t.jSXElement(openingElement, closingElement, children, selfClosing) ``` See also `t.isJSXElement(node, opts)` and `t.assertJSXElement(node, opts)`. Aliases: `JSX`, `Immutable`, `Expression` - `openingElement`: `JSXOpeningElement` (required) - `closingElement`: `JSXClosingElement` (default: `null`) - `children`: `Array<JSXText | JSXExpressionContainer | JSXSpreadChild | JSXElement>` (required) - `selfClosing` (required) --- ### jSXEmptyExpression ```javascript t.jSXEmptyExpression() ``` See also `t.isJSXEmptyExpression(node, opts)` and `t.assertJSXEmptyExpression(node, opts)`. Aliases: `JSX`, `Expression` --- ### jSXExpressionContainer ```javascript t.jSXExpressionContainer(expression) ``` See also `t.isJSXExpressionContainer(node, opts)` and `t.assertJSXExpressionContainer(node, opts)`. Aliases: `JSX`, `Immutable` - `expression`: `Expression` (required) --- ### jSXIdentifier ```javascript t.jSXIdentifier(name) ``` See also `t.isJSXIdentifier(node, opts)` and `t.assertJSXIdentifier(node, opts)`. Aliases: `JSX`, `Expression` - `name`: `string` (required) --- ### jSXMemberExpression ```javascript t.jSXMemberExpression(object, property) ``` See also `t.isJSXMemberExpression(node, opts)` and `t.assertJSXMemberExpression(node, opts)`. Aliases: `JSX`, `Expression` - `object`: `JSXMemberExpression | JSXIdentifier` (required) - `property`: `JSXIdentifier` (required) --- ### jSXNamespacedName ```javascript t.jSXNamespacedName(namespace, name) ``` See also `t.isJSXNamespacedName(node, opts)` and `t.assertJSXNamespacedName(node, opts)`. Aliases: `JSX` - `namespace`: `JSXIdentifier` (required) - `name`: `JSXIdentifier` (required) --- ### jSXOpeningElement ```javascript t.jSXOpeningElement(name, attributes, selfClosing) ``` See also `t.isJSXOpeningElement(node, opts)` and `t.assertJSXOpeningElement(node, opts)`. Aliases: `JSX`, `Immutable` - `name`: `JSXIdentifier | JSXMemberExpression` (required) - `attributes`: `Array<JSXAttribute | JSXSpreadAttribute>` (required) - `selfClosing`: `boolean` (default: `false`) --- ### jSXSpreadAttribute ```javascript t.jSXSpreadAttribute(argument) ``` See also `t.isJSXSpreadAttribute(node, opts)` and `t.assertJSXSpreadAttribute(node, opts)`. Aliases: `JSX` - `argument`: `Expression` (required) --- ### jSXSpreadChild ```javascript t.jSXSpreadChild(expression) ``` See also `t.isJSXSpreadChild(node, opts)` and `t.assertJSXSpreadChild(node, opts)`. Aliases: `JSX`, `Immutable` - `expression`: `Expression` (required) --- ### jSXText ```javascript t.jSXText(value) ``` See also `t.isJSXText(node, opts)` and `t.assertJSXText(node, opts)`. Aliases: `JSX`, `Immutable` - `value`: `string` (required) --- ### labeledStatement ```javascript t.labeledStatement(label, body) ``` See also `t.isLabeledStatement(node, opts)` and `t.assertLabeledStatement(node, opts)`. Aliases: `Statement` - `label`: `Identifier` (required) - `body`: `Statement` (required) --- ### logicalExpression ```javascript t.logicalExpression(operator, left, right) ``` See also `t.isLogicalExpression(node, opts)` and `t.assertLogicalExpression(node, opts)`. Aliases: `Binary`, `Expression` - `operator`: `'||' | '&&'` (required) - `left`: `Expression` (required) - `right`: `Expression` (required) --- ### memberExpression ```javascript t.memberExpression(object, property, computed) ``` See also `t.isMemberExpression(node, opts)` and `t.assertMemberExpression(node, opts)`. Aliases: `Expression`, `LVal` - `object`: `Expression` (required) - `property`if computed then `Expression` else `Identifier` (required) - `computed`: `boolean` (default: `false`) --- ### metaProperty ```javascript t.metaProperty(meta, property) ``` See also `t.isMetaProperty(node, opts)` and `t.assertMetaProperty(node, opts)`. Aliases: `Expression` - `meta`: `string` (required) - `property`: `string` (required) --- ### mixedTypeAnnotation ```javascript t.mixedTypeAnnotation() ``` See also `t.isMixedTypeAnnotation(node, opts)` and `t.assertMixedTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### newExpression ```javascript t.newExpression(callee, arguments) ``` See also `t.isNewExpression(node, opts)` and `t.assertNewExpression(node, opts)`. Aliases: `Expression` - `callee`: `Expression` (required) - `arguments`: `Array<Expression | SpreadElement>` (required) --- ### noop ```javascript t.noop() ``` See also `t.isNoop(node, opts)` and `t.assertNoop(node, opts)`. --- ### nullLiteral ```javascript t.nullLiteral() ``` See also `t.isNullLiteral(node, opts)` and `t.assertNullLiteral(node, opts)`. Aliases: `Expression`, `Pureish`, `Literal`, `Immutable` --- ### nullLiteralTypeAnnotation ```javascript t.nullLiteralTypeAnnotation() ``` See also `t.isNullLiteralTypeAnnotation(node, opts)` and `t.assertNullLiteralTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### nullableTypeAnnotation ```javascript t.nullableTypeAnnotation(typeAnnotation) ``` See also `t.isNullableTypeAnnotation(node, opts)` and `t.assertNullableTypeAnnotation(node, opts)`. Aliases: `Flow` - `typeAnnotation` (required) --- ### numberTypeAnnotation ```javascript t.numberTypeAnnotation() ``` See also `t.isNumberTypeAnnotation(node, opts)` and `t.assertNumberTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### numericLiteral ```javascript t.numericLiteral(value) ``` See also `t.isNumericLiteral(node, opts)` and `t.assertNumericLiteral(node, opts)`. Aliases: `Expression`, `Pureish`, `Literal`, `Immutable` - `value`: `number` (required) --- ### numericLiteralTypeAnnotation ```javascript t.numericLiteralTypeAnnotation() ``` See also `t.isNumericLiteralTypeAnnotation(node, opts)` and `t.assertNumericLiteralTypeAnnotation(node, opts)`. Aliases: `Flow` --- ### objectExpression ```javascript t.objectExpression(properties) ``` See also `t.isObjectExpression(node, opts)` and `t.assertObjectExpression(node, opts)`. Aliases: `Expression` - `properties`: `Array<ObjectMethod | ObjectProperty | SpreadProperty>` (required) --- ### objectMethod ```javascript t.objectMethod(kind, key, params, body, computed) ``` See also `t.isObjectMethod(node, opts)` and `t.assertObjectMethod(node, opts)`. Aliases: `UserWhitespacable`, `Function`, `Scopable`, `BlockParent`, `FunctionParent`, `Method`, `ObjectMember` - `kind`: `"method" | "get" | "set"` (default: `'method'`) - `key`if computed then `Expression` else `Identifier | Literal` (required) - `params` (required) - `body`: `BlockStatement` (required) - `computed`: `boolean` (default: `false`) - `async`: `boolean` (default: `false`) - `decorators`: `Array<Decorator>` (default: `null`) - `generator`: `boolean` (default: `false`) - `returnType` (default: `null`) - `typeParameters` (default: `null`) --- ### objectPattern ```javascript t.objectPattern(properties, typeAnnotation) ``` See also `t.isObjectPattern(node, opts)` and `t.assertObjectPattern(node, opts)`. Aliases: `Pattern`, `LVal` - `properties`: `Array<RestProperty | Property>` (required) - `typeAnnotation` (required) - `decorators`: `Array<Decorator>` (default: `null`) --- ### objectProperty ```javascript t.objectProperty(key, value, computed, shorthand, decorators) ``` See also `t.isObjectProperty(node, opts)` and `t.assertObjectProperty(node, opts)`. Aliases: `UserWhitespacable`, `Property`, `ObjectMember` - `key`if computed then `Expression` else `Identifier | Literal` (required) - `value`: `Expression | Pattern | RestElement` (required) - `computed`: `boolean` (default: `false`) - `shorthand`: `boolean` (default: `false`) - `decorators`: `Array<Decorator>` (default: `null`) --- ### objectTypeAnnotation ```javascript t.objectTypeAnnotation(properties, indexers, callProperties) ``` See also `t.isObjectTypeAnnotation(node, opts)` and `t.assertObjectTypeAnnotation(node, opts)`. Aliases: `Flow` - `properties` (required) - `indexers` (required) - `callProperties` (required) --- ### objectTypeCallProperty ```javascript t.objectTypeCallProperty(value) ``` See also `t.isObjectTypeCallProperty(node, opts)` and `t.assertObjectTypeCallProperty(node, opts)`. Aliases: `Flow`, `UserWhitespacable` - `value` (required) --- ### objectTypeIndexer ```javascript t.objectTypeIndexer(id, key, value) ``` See also `t.isObjectTypeIndexer(node, opts)` and `t.assertObjectTypeIndexer(node, opts)`. Aliases: `Flow`, `UserWhitespacable` - `id` (required) - `key` (required) - `value` (required) --- ### objectTypeProperty ```javascript t.objectTypeProperty(key, value) ``` See also `t.isObjectTypeProperty(node, opts)` and `t.assertObjectTypeProperty(node, opts)`. Aliases: `Flow`, `UserWhitespacable` - `key` (required) - `value` (required) --- ### objectTypeSpreadProperty ```javascript t.objectTypeSpreadProperty(argument) ``` See also `t.isObjectTypeSpreadProperty(node, opts)` and `t.assertObjectTypeSpreadProperty(node, opts)`. Aliases: `Flow`, `UserWhitespacable` - `argument` (required) --- ### opaqueType ```javascript t.opaqueType(id, typeParameters, impltype, supertype) ``` See also `t.isOpaqueType(node, opts)` and `t.assertOpaqueType(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `impltype` (required) - `supertype` (required) --- ### parenthesizedExpression ```javascript t.parenthesizedExpression(expression) ``` See also `t.isParenthesizedExpression(node, opts)` and `t.assertParenthesizedExpression(node, opts)`. Aliases: `Expression`, `ExpressionWrapper` - `expression`: `Expression` (required) --- ### program ```javascript t.program(body, directives) ``` See also `t.isProgram(node, opts)` and `t.assertProgram(node, opts)`. Aliases: `Scopable`, `BlockParent`, `Block`, `FunctionParent` - `body`: `Array<Statement>` (required) - `directives`: `Array<Directive>` (default: `[]`) --- ### qualifiedTypeIdentifier ```javascript t.qualifiedTypeIdentifier(id, qualification) ``` See also `t.isQualifiedTypeIdentifier(node, opts)` and `t.assertQualifiedTypeIdentifier(node, opts)`. Aliases: `Flow` - `id` (required) - `qualification` (required) --- ### regExpLiteral ```javascript t.regExpLiteral(pattern, flags) ``` See also `t.isRegExpLiteral(node, opts)` and `t.assertRegExpLiteral(node, opts)`. Aliases: `Expression`, `Literal` - `pattern`: `string` (required) - `flags`: `string` (default: `''`) --- ### restElement ```javascript t.restElement(argument, typeAnnotation) ``` See also `t.isRestElement(node, opts)` and `t.assertRestElement(node, opts)`. Aliases: `LVal` - `argument`: `LVal` (required) - `typeAnnotation` (required) - `decorators`: `Array<Decorator>` (default: `null`) --- ### restProperty ```javascript t.restProperty(argument) ``` See also `t.isRestProperty(node, opts)` and `t.assertRestProperty(node, opts)`. Aliases: `UnaryLike` - `argument`: `LVal` (required) --- ### returnStatement ```javascript t.returnStatement(argument) ``` See also `t.isReturnStatement(node, opts)` and `t.assertReturnStatement(node, opts)`. Aliases: `Statement`, `Terminatorless`, `CompletionStatement` - `argument`: `Expression` (default: `null`) --- ### sequenceExpression ```javascript t.sequenceExpression(expressions) ``` See also `t.isSequenceExpression(node, opts)` and `t.assertSequenceExpression(node, opts)`. Aliases: `Expression` - `expressions`: `Array<Expression>` (required) --- ### spreadElement ```javascript t.spreadElement(argument) ``` See also `t.isSpreadElement(node, opts)` and `t.assertSpreadElement(node, opts)`. Aliases: `UnaryLike` - `argument`: `Expression` (required) --- ### spreadProperty ```javascript t.spreadProperty(argument) ``` See also `t.isSpreadProperty(node, opts)` and `t.assertSpreadProperty(node, opts)`. Aliases: `UnaryLike` - `argument`: `Expression` (required) --- ### stringLiteral ```javascript t.stringLiteral(value) ``` See also `t.isStringLiteral(node, opts)` and `t.assertStringLiteral(node, opts)`. Aliases: `Expression`, `Pureish`, `Literal`, `Immutable` - `value`: `string` (required) --- ### stringLiteralTypeAnnotation ```javascript t.stringLiteralTypeAnnotation() ``` See also `t.isStringLiteralTypeAnnotation(node, opts)` and `t.assertStringLiteralTypeAnnotation(node, opts)`. Aliases: `Flow` --- ### stringTypeAnnotation ```javascript t.stringTypeAnnotation() ``` See also `t.isStringTypeAnnotation(node, opts)` and `t.assertStringTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### super ```javascript t.super() ``` See also `t.isSuper(node, opts)` and `t.assertSuper(node, opts)`. Aliases: `Expression` --- ### switchCase ```javascript t.switchCase(test, consequent) ``` See also `t.isSwitchCase(node, opts)` and `t.assertSwitchCase(node, opts)`. - `test`: `Expression` (default: `null`) - `consequent`: `Array<Statement>` (required) --- ### switchStatement ```javascript t.switchStatement(discriminant, cases) ``` See also `t.isSwitchStatement(node, opts)` and `t.assertSwitchStatement(node, opts)`. Aliases: `Statement`, `BlockParent`, `Scopable` - `discriminant`: `Expression` (required) - `cases`: `Array<SwitchCase>` (required) --- ### taggedTemplateExpression ```javascript t.taggedTemplateExpression(tag, quasi) ``` See also `t.isTaggedTemplateExpression(node, opts)` and `t.assertTaggedTemplateExpression(node, opts)`. Aliases: `Expression` - `tag`: `Expression` (required) - `quasi`: `TemplateLiteral` (required) --- ### templateElement ```javascript t.templateElement(value, tail) ``` See also `t.isTemplateElement(node, opts)` and `t.assertTemplateElement(node, opts)`. - `value` (required) - `tail`: `boolean` (default: `false`) --- ### templateLiteral ```javascript t.templateLiteral(quasis, expressions) ``` See also `t.isTemplateLiteral(node, opts)` and `t.assertTemplateLiteral(node, opts)`. Aliases: `Expression`, `Literal` - `quasis`: `Array<TemplateElement>` (required) - `expressions`: `Array<Expression>` (required) --- ### thisExpression ```javascript t.thisExpression() ``` See also `t.isThisExpression(node, opts)` and `t.assertThisExpression(node, opts)`. Aliases: `Expression` --- ### thisTypeAnnotation ```javascript t.thisTypeAnnotation() ``` See also `t.isThisTypeAnnotation(node, opts)` and `t.assertThisTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### throwStatement ```javascript t.throwStatement(argument) ``` See also `t.isThrowStatement(node, opts)` and `t.assertThrowStatement(node, opts)`. Aliases: `Statement`, `Terminatorless`, `CompletionStatement` - `argument`: `Expression` (required) --- ### tryStatement ```javascript t.tryStatement(block, handler, finalizer) ``` See also `t.isTryStatement(node, opts)` and `t.assertTryStatement(node, opts)`. Aliases: `Statement` - `block` (required) - `handler` (default: `null`) - `finalizer`: `BlockStatement` (default: `null`) - `body`: `BlockStatement` (default: `null`) --- ### tupleTypeAnnotation ```javascript t.tupleTypeAnnotation(types) ``` See also `t.isTupleTypeAnnotation(node, opts)` and `t.assertTupleTypeAnnotation(node, opts)`. Aliases: `Flow` - `types` (required) --- ### typeAlias ```javascript t.typeAlias(id, typeParameters, right) ``` See also `t.isTypeAlias(node, opts)` and `t.assertTypeAlias(node, opts)`. Aliases: `Flow`, `FlowDeclaration`, `Statement`, `Declaration` - `id` (required) - `typeParameters` (required) - `right` (required) --- ### typeAnnotation ```javascript t.typeAnnotation(typeAnnotation) ``` See also `t.isTypeAnnotation(node, opts)` and `t.assertTypeAnnotation(node, opts)`. Aliases: `Flow` - `typeAnnotation` (required) --- ### typeCastExpression ```javascript t.typeCastExpression(expression, typeAnnotation) ``` See also `t.isTypeCastExpression(node, opts)` and `t.assertTypeCastExpression(node, opts)`. Aliases: `Flow`, `ExpressionWrapper`, `Expression` - `expression` (required) - `typeAnnotation` (required) --- ### typeParameter ```javascript t.typeParameter(bound) ``` See also `t.isTypeParameter(node, opts)` and `t.assertTypeParameter(node, opts)`. Aliases: `Flow` - `bound` (required) --- ### typeParameterDeclaration ```javascript t.typeParameterDeclaration(params) ``` See also `t.isTypeParameterDeclaration(node, opts)` and `t.assertTypeParameterDeclaration(node, opts)`. Aliases: `Flow` - `params` (required) --- ### typeParameterInstantiation ```javascript t.typeParameterInstantiation(params) ``` See also `t.isTypeParameterInstantiation(node, opts)` and `t.assertTypeParameterInstantiation(node, opts)`. Aliases: `Flow` - `params` (required) --- ### typeofTypeAnnotation ```javascript t.typeofTypeAnnotation(argument) ``` See also `t.isTypeofTypeAnnotation(node, opts)` and `t.assertTypeofTypeAnnotation(node, opts)`. Aliases: `Flow` - `argument` (required) --- ### unaryExpression ```javascript t.unaryExpression(operator, argument, prefix) ``` See also `t.isUnaryExpression(node, opts)` and `t.assertUnaryExpression(node, opts)`. Aliases: `UnaryLike`, `Expression` - `operator`: `'void' | 'delete' | '!' | '+' | '-' | '++' | '--' | '~' | 'typeof'` (required) - `argument`: `Expression` (required) - `prefix`: `boolean` (default: `true`) --- ### unionTypeAnnotation ```javascript t.unionTypeAnnotation(types) ``` See also `t.isUnionTypeAnnotation(node, opts)` and `t.assertUnionTypeAnnotation(node, opts)`. Aliases: `Flow` - `types` (required) --- ### updateExpression ```javascript t.updateExpression(operator, argument, prefix) ``` See also `t.isUpdateExpression(node, opts)` and `t.assertUpdateExpression(node, opts)`. Aliases: `Expression` - `operator`: `'++' | '--'` (required) - `argument`: `Expression` (required) - `prefix`: `boolean` (default: `false`) --- ### variableDeclaration ```javascript t.variableDeclaration(kind, declarations) ``` See also `t.isVariableDeclaration(node, opts)` and `t.assertVariableDeclaration(node, opts)`. Aliases: `Statement`, `Declaration` - `kind`: `"var" | "let" | "const"` (required) - `declarations`: `Array<VariableDeclarator>` (required) --- ### variableDeclarator ```javascript t.variableDeclarator(id, init) ``` See also `t.isVariableDeclarator(node, opts)` and `t.assertVariableDeclarator(node, opts)`. - `id`: `LVal` (required) - `init`: `Expression` (default: `null`) --- ### voidTypeAnnotation ```javascript t.voidTypeAnnotation() ``` See also `t.isVoidTypeAnnotation(node, opts)` and `t.assertVoidTypeAnnotation(node, opts)`. Aliases: `Flow`, `FlowBaseAnnotation` --- ### whileStatement ```javascript t.whileStatement(test, body) ``` See also `t.isWhileStatement(node, opts)` and `t.assertWhileStatement(node, opts)`. Aliases: `Statement`, `BlockParent`, `Loop`, `While`, `Scopable` - `test`: `Expression` (required) - `body`: `BlockStatement | Statement` (required) --- ### withStatement ```javascript t.withStatement(object, body) ``` See also `t.isWithStatement(node, opts)` and `t.assertWithStatement(node, opts)`. Aliases: `Statement` - `object` (required) - `body`: `BlockStatement | Statement` (required) --- ### yieldExpression ```javascript t.yieldExpression(argument, delegate) ``` See also `t.isYieldExpression(node, opts)` and `t.assertYieldExpression(node, opts)`. Aliases: `Expression`, `Terminatorless` - `argument`: `Expression` (default: `null`) - `delegate`: `boolean` (default: `false`) --- <!-- end generated section -->