babel-types

This module contains methods for building ASTs manually and for checking the types of AST nodes.

Install

npm install --save-dev babel-types

API

anyTypeAnnotation

t.anyTypeAnnotation()

See also t.isAnyTypeAnnotation(node, opts) and t.assertAnyTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

arrayExpression

t.arrayExpression(elements)

See also t.isArrayExpression(node, opts) and t.assertArrayExpression(node, opts).

Aliases: Expression

elements: Array<null | Expression | SpreadElement> (default: [])

arrayPattern

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

t.arrayTypeAnnotation(elementType)

See also t.isArrayTypeAnnotation(node, opts) and t.assertArrayTypeAnnotation(node, opts).

Aliases: Flow

elementType (required)

arrowFunctionExpression

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

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

t.assignmentPattern(left, right)

See also t.isAssignmentPattern(node, opts) and t.assertAssignmentPattern(node, opts).

Aliases: Pattern, LVal

left: Identifier | ObjectPattern | ArrayPattern (required)
right: Expression (required)
decorators: Array<Decorator> (default: null)

awaitExpression

t.awaitExpression(argument)

See also t.isAwaitExpression(node, opts) and t.assertAwaitExpression(node, opts).

Aliases: Expression, Terminatorless

argument: Expression (required)

binaryExpression

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

t.bindExpression(object, callee)

See also t.isBindExpression(node, opts) and t.assertBindExpression(node, opts).

Aliases: Expression

object (required)
callee (required)

blockStatement

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

t.booleanLiteral(value)

See also t.isBooleanLiteral(node, opts) and t.assertBooleanLiteral(node, opts).

Aliases: Expression, Pureish, Literal, Immutable

value: boolean (required)

booleanLiteralTypeAnnotation

t.booleanLiteralTypeAnnotation()

See also t.isBooleanLiteralTypeAnnotation(node, opts) and t.assertBooleanLiteralTypeAnnotation(node, opts).

Aliases: Flow

booleanTypeAnnotation

t.booleanTypeAnnotation()

See also t.isBooleanTypeAnnotation(node, opts) and t.assertBooleanTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

breakStatement

t.breakStatement(label)

See also t.isBreakStatement(node, opts) and t.assertBreakStatement(node, opts).

Aliases: Statement, Terminatorless, CompletionStatement

label: Identifier (default: null)

callExpression

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)
optional: true | false (default: null)

catchClause

t.catchClause(param, body)

See also t.isCatchClause(node, opts) and t.assertCatchClause(node, opts).

Aliases: Scopable

param: Identifier (required)
body: BlockStatement (required)

classBody

t.classBody(body)

See also t.isClassBody(node, opts) and t.assertClassBody(node, opts).

body: Array<ClassMethod | ClassProperty> (required)

classDeclaration

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

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

t.classImplements(id, typeParameters)

See also t.isClassImplements(node, opts) and t.assertClassImplements(node, opts).

Aliases: Flow

id (required)
typeParameters (required)

classMethod

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

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

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

t.continueStatement(label)

See also t.isContinueStatement(node, opts) and t.assertContinueStatement(node, opts).

Aliases: Statement, Terminatorless, CompletionStatement

label: Identifier (default: null)

debuggerStatement

t.debuggerStatement()

See also t.isDebuggerStatement(node, opts) and t.assertDebuggerStatement(node, opts).

Aliases: Statement

declareClass

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)

declareExportAllDeclaration

t.declareExportAllDeclaration(source)

See also t.isDeclareExportAllDeclaration(node, opts) and t.assertDeclareExportAllDeclaration(node, opts).

Aliases: Flow, FlowDeclaration, Statement, Declaration

source (required)

declareExportDeclaration

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

t.declareFunction(id)

See also t.isDeclareFunction(node, opts) and t.assertDeclareFunction(node, opts).

Aliases: Flow, FlowDeclaration, Statement, Declaration

id (required)

declareInterface

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

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

t.declareModuleExports(typeAnnotation)

See also t.isDeclareModuleExports(node, opts) and t.assertDeclareModuleExports(node, opts).

Aliases: Flow, FlowDeclaration, Statement, Declaration

typeAnnotation (required)

declareTypeAlias

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

t.declareVariable(id)

See also t.isDeclareVariable(node, opts) and t.assertDeclareVariable(node, opts).

Aliases: Flow, FlowDeclaration, Statement, Declaration

id (required)

decorator

t.decorator(expression)

See also t.isDecorator(node, opts) and t.assertDecorator(node, opts).

expression: Expression (required)

directive

t.directive(value)

See also t.isDirective(node, opts) and t.assertDirective(node, opts).

value: DirectiveLiteral (required)

directiveLiteral

t.directiveLiteral(value)

See also t.isDirectiveLiteral(node, opts) and t.assertDirectiveLiteral(node, opts).

value: string (required)

doExpression

t.doExpression(body)

See also t.isDoExpression(node, opts) and t.assertDoExpression(node, opts).

Aliases: Expression

body: BlockStatement (required)

doWhileStatement

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

t.emptyStatement()

See also t.isEmptyStatement(node, opts) and t.assertEmptyStatement(node, opts).

Aliases: Statement

emptyTypeAnnotation

t.emptyTypeAnnotation()

See also t.isEmptyTypeAnnotation(node, opts) and t.assertEmptyTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

existsTypeAnnotation

t.existsTypeAnnotation()

See also t.isExistsTypeAnnotation(node, opts) and t.assertExistsTypeAnnotation(node, opts).

Aliases: Flow

exportAllDeclaration

t.exportAllDeclaration(source)

See also t.isExportAllDeclaration(node, opts) and t.assertExportAllDeclaration(node, opts).

Aliases: Statement, Declaration, ModuleDeclaration, ExportDeclaration

source: StringLiteral (required)

exportDefaultDeclaration

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

t.exportDefaultSpecifier(exported)

See also t.isExportDefaultSpecifier(node, opts) and t.assertExportDefaultSpecifier(node, opts).

Aliases: ModuleSpecifier

exported: Identifier (required)

exportNamedDeclaration

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

t.exportNamespaceSpecifier(exported)

See also t.isExportNamespaceSpecifier(node, opts) and t.assertExportNamespaceSpecifier(node, opts).

Aliases: ModuleSpecifier

exported: Identifier (required)

exportSpecifier

t.exportSpecifier(local, exported)

See also t.isExportSpecifier(node, opts) and t.assertExportSpecifier(node, opts).

Aliases: ModuleSpecifier

local: Identifier (required)
exported: Identifier (required)

expressionStatement

t.expressionStatement(expression)

See also t.isExpressionStatement(node, opts) and t.assertExpressionStatement(node, opts).

Aliases: Statement, ExpressionWrapper

expression: Expression (required)

file

t.file(program, comments, tokens)

See also t.isFile(node, opts) and t.assertFile(node, opts).

program: Program (required)
comments (required)
tokens (required)

forInStatement

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

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)
await: boolean (default: false)

forStatement

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

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

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

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

t.functionTypeParam(name, typeAnnotation)

See also t.isFunctionTypeParam(node, opts) and t.assertFunctionTypeParam(node, opts).

Aliases: Flow

name (required)
typeAnnotation (required)

genericTypeAnnotation

t.genericTypeAnnotation(id, typeParameters)

See also t.isGenericTypeAnnotation(node, opts) and t.assertGenericTypeAnnotation(node, opts).

Aliases: Flow

id (required)
typeParameters (required)

identifier

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

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

t.import()

See also t.isImport(node, opts) and t.assertImport(node, opts).

Aliases: Expression

importDeclaration

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

t.importDefaultSpecifier(local)

See also t.isImportDefaultSpecifier(node, opts) and t.assertImportDefaultSpecifier(node, opts).

Aliases: ModuleSpecifier

local: Identifier (required)

importNamespaceSpecifier

t.importNamespaceSpecifier(local)

See also t.isImportNamespaceSpecifier(node, opts) and t.assertImportNamespaceSpecifier(node, opts).

Aliases: ModuleSpecifier

local: Identifier (required)

importSpecifier

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

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

t.interfaceExtends(id, typeParameters)

See also t.isInterfaceExtends(node, opts) and t.assertInterfaceExtends(node, opts).

Aliases: Flow

id (required)
typeParameters (required)

intersectionTypeAnnotation

t.intersectionTypeAnnotation(types)

See also t.isIntersectionTypeAnnotation(node, opts) and t.assertIntersectionTypeAnnotation(node, opts).

Aliases: Flow

types (required)

jSXAttribute

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

t.jSXClosingElement(name)

See also t.isJSXClosingElement(node, opts) and t.assertJSXClosingElement(node, opts).

Aliases: JSX, Immutable

name: JSXIdentifier | JSXMemberExpression (required)

jSXElement

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

t.jSXEmptyExpression()

See also t.isJSXEmptyExpression(node, opts) and t.assertJSXEmptyExpression(node, opts).

Aliases: JSX, Expression

jSXExpressionContainer

t.jSXExpressionContainer(expression)

See also t.isJSXExpressionContainer(node, opts) and t.assertJSXExpressionContainer(node, opts).

Aliases: JSX, Immutable

expression: Expression (required)

jSXIdentifier

t.jSXIdentifier(name)

See also t.isJSXIdentifier(node, opts) and t.assertJSXIdentifier(node, opts).

Aliases: JSX, Expression

name: string (required)

jSXMemberExpression

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

t.jSXNamespacedName(namespace, name)

See also t.isJSXNamespacedName(node, opts) and t.assertJSXNamespacedName(node, opts).

Aliases: JSX

namespace: JSXIdentifier (required)
name: JSXIdentifier (required)

jSXOpeningElement

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

t.jSXSpreadAttribute(argument)

See also t.isJSXSpreadAttribute(node, opts) and t.assertJSXSpreadAttribute(node, opts).

Aliases: JSX

argument: Expression (required)

jSXSpreadChild

t.jSXSpreadChild(expression)

See also t.isJSXSpreadChild(node, opts) and t.assertJSXSpreadChild(node, opts).

Aliases: JSX, Immutable

expression: Expression (required)

jSXText

t.jSXText(value)

See also t.isJSXText(node, opts) and t.assertJSXText(node, opts).

Aliases: JSX, Immutable

value: string (required)

labeledStatement

t.labeledStatement(label, body)

See also t.isLabeledStatement(node, opts) and t.assertLabeledStatement(node, opts).

Aliases: Statement

label: Identifier (required)
body: Statement (required)

logicalExpression

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

t.memberExpression(object, property, computed, optional)

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)
optional: true | false (default: null)

metaProperty

t.metaProperty(meta, property)

See also t.isMetaProperty(node, opts) and t.assertMetaProperty(node, opts).

Aliases: Expression

meta: Identifier (required)
property: Identifier (required)

mixedTypeAnnotation

t.mixedTypeAnnotation()

See also t.isMixedTypeAnnotation(node, opts) and t.assertMixedTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

newExpression

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)
optional: true | false (default: null)

noop

t.noop()

See also t.isNoop(node, opts) and t.assertNoop(node, opts).

nullLiteral

t.nullLiteral()

See also t.isNullLiteral(node, opts) and t.assertNullLiteral(node, opts).

Aliases: Expression, Pureish, Literal, Immutable

nullLiteralTypeAnnotation

t.nullLiteralTypeAnnotation()

See also t.isNullLiteralTypeAnnotation(node, opts) and t.assertNullLiteralTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

nullableTypeAnnotation

t.nullableTypeAnnotation(typeAnnotation)

See also t.isNullableTypeAnnotation(node, opts) and t.assertNullableTypeAnnotation(node, opts).

Aliases: Flow

typeAnnotation (required)

numberLiteralTypeAnnotation

t.numberLiteralTypeAnnotation()

See also t.isNumberLiteralTypeAnnotation(node, opts) and t.assertNumberLiteralTypeAnnotation(node, opts).

Aliases: Flow

numberTypeAnnotation

t.numberTypeAnnotation()

See also t.isNumberTypeAnnotation(node, opts) and t.assertNumberTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

numericLiteral

t.numericLiteral(value)

See also t.isNumericLiteral(node, opts) and t.assertNumericLiteral(node, opts).

Aliases: Expression, Pureish, Literal, Immutable

value: number (required)

objectExpression

t.objectExpression(properties)

See also t.isObjectExpression(node, opts) and t.assertObjectExpression(node, opts).

Aliases: Expression

properties: Array<ObjectMethod | ObjectProperty | SpreadElement> (required)

objectMethod

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

t.objectPattern(properties, typeAnnotation)

See also t.isObjectPattern(node, opts) and t.assertObjectPattern(node, opts).

Aliases: Pattern, LVal

properties: Array<RestElement | Property> (required)
typeAnnotation (required)
decorators: Array<Decorator> (default: null)

objectProperty

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

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

t.objectTypeCallProperty(value)

See also t.isObjectTypeCallProperty(node, opts) and t.assertObjectTypeCallProperty(node, opts).

Aliases: Flow, UserWhitespacable

value (required)

objectTypeIndexer

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

t.objectTypeProperty(key, value)

See also t.isObjectTypeProperty(node, opts) and t.assertObjectTypeProperty(node, opts).

Aliases: Flow, UserWhitespacable

key (required)
value (required)

objectTypeSpreadProperty

t.objectTypeSpreadProperty(argument)

See also t.isObjectTypeSpreadProperty(node, opts) and t.assertObjectTypeSpreadProperty(node, opts).

Aliases: Flow, UserWhitespacable

argument (required)

parenthesizedExpression

t.parenthesizedExpression(expression)

See also t.isParenthesizedExpression(node, opts) and t.assertParenthesizedExpression(node, opts).

Aliases: Expression, ExpressionWrapper

expression: Expression (required)

program

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

t.qualifiedTypeIdentifier(id, qualification)

See also t.isQualifiedTypeIdentifier(node, opts) and t.assertQualifiedTypeIdentifier(node, opts).

Aliases: Flow

id (required)
qualification (required)

regExpLiteral

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

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)

returnStatement

t.returnStatement(argument)

See also t.isReturnStatement(node, opts) and t.assertReturnStatement(node, opts).

Aliases: Statement, Terminatorless, CompletionStatement

argument: Expression (default: null)

sequenceExpression

t.sequenceExpression(expressions)

See also t.isSequenceExpression(node, opts) and t.assertSequenceExpression(node, opts).

Aliases: Expression

expressions: Array<Expression> (required)

spreadElement

t.spreadElement(argument)

See also t.isSpreadElement(node, opts) and t.assertSpreadElement(node, opts).

Aliases: UnaryLike

argument: Expression (required)

stringLiteral

t.stringLiteral(value)

See also t.isStringLiteral(node, opts) and t.assertStringLiteral(node, opts).

Aliases: Expression, Pureish, Literal, Immutable

value: string (required)

stringLiteralTypeAnnotation

t.stringLiteralTypeAnnotation()

See also t.isStringLiteralTypeAnnotation(node, opts) and t.assertStringLiteralTypeAnnotation(node, opts).

Aliases: Flow

stringTypeAnnotation

t.stringTypeAnnotation()

See also t.isStringTypeAnnotation(node, opts) and t.assertStringTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

super

t.super()

See also t.isSuper(node, opts) and t.assertSuper(node, opts).

Aliases: Expression

switchCase

t.switchCase(test, consequent)

See also t.isSwitchCase(node, opts) and t.assertSwitchCase(node, opts).

test: Expression (default: null)
consequent: Array<Statement> (required)

switchStatement

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

t.taggedTemplateExpression(tag, quasi)

See also t.isTaggedTemplateExpression(node, opts) and t.assertTaggedTemplateExpression(node, opts).

Aliases: Expression

tag: Expression (required)
quasi: TemplateLiteral (required)

templateElement

t.templateElement(value, tail)

See also t.isTemplateElement(node, opts) and t.assertTemplateElement(node, opts).

value (required)
tail: boolean (default: false)

templateLiteral

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

t.thisExpression()

See also t.isThisExpression(node, opts) and t.assertThisExpression(node, opts).

Aliases: Expression

thisTypeAnnotation

t.thisTypeAnnotation()

See also t.isThisTypeAnnotation(node, opts) and t.assertThisTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

throwStatement

t.throwStatement(argument)

See also t.isThrowStatement(node, opts) and t.assertThrowStatement(node, opts).

Aliases: Statement, Terminatorless, CompletionStatement

argument: Expression (required)

tryStatement

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

t.tupleTypeAnnotation(types)

See also t.isTupleTypeAnnotation(node, opts) and t.assertTupleTypeAnnotation(node, opts).

Aliases: Flow

types (required)

typeAlias

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

t.typeAnnotation(typeAnnotation)

See also t.isTypeAnnotation(node, opts) and t.assertTypeAnnotation(node, opts).

Aliases: Flow

typeAnnotation (required)

typeCastExpression

t.typeCastExpression(expression, typeAnnotation)

See also t.isTypeCastExpression(node, opts) and t.assertTypeCastExpression(node, opts).

Aliases: Flow, ExpressionWrapper, Expression

expression (required)
typeAnnotation (required)

typeParameter

t.typeParameter(bound)

See also t.isTypeParameter(node, opts) and t.assertTypeParameter(node, opts).

Aliases: Flow

bound (required)

typeParameterDeclaration

t.typeParameterDeclaration(params)

See also t.isTypeParameterDeclaration(node, opts) and t.assertTypeParameterDeclaration(node, opts).

Aliases: Flow

params (required)

typeParameterInstantiation

t.typeParameterInstantiation(params)

See also t.isTypeParameterInstantiation(node, opts) and t.assertTypeParameterInstantiation(node, opts).

Aliases: Flow

params (required)

typeofTypeAnnotation

t.typeofTypeAnnotation(argument)

See also t.isTypeofTypeAnnotation(node, opts) and t.assertTypeofTypeAnnotation(node, opts).

Aliases: Flow

argument (required)

unaryExpression

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

t.unionTypeAnnotation(types)

See also t.isUnionTypeAnnotation(node, opts) and t.assertUnionTypeAnnotation(node, opts).

Aliases: Flow

types (required)

updateExpression

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

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

t.variableDeclarator(id, init)

See also t.isVariableDeclarator(node, opts) and t.assertVariableDeclarator(node, opts).

id: LVal (required)
init: Expression (default: null)

voidTypeAnnotation

t.voidTypeAnnotation()

See also t.isVoidTypeAnnotation(node, opts) and t.assertVoidTypeAnnotation(node, opts).

Aliases: Flow, FlowBaseAnnotation

whileStatement

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

t.withStatement(object, body)

See also t.isWithStatement(node, opts) and t.assertWithStatement(node, opts).

Aliases: Statement

object (required)
body: BlockStatement | Statement (required)

yieldExpression

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)

Files

README.md

Latest commit

History

README.md

File metadata and controls

babel-types

Install

API

anyTypeAnnotation

arrayExpression

arrayPattern

arrayTypeAnnotation

arrowFunctionExpression

assignmentExpression

assignmentPattern

awaitExpression

binaryExpression

bindExpression

blockStatement

booleanLiteral

booleanLiteralTypeAnnotation

booleanTypeAnnotation

breakStatement

callExpression

catchClause

classBody

classDeclaration

classExpression

classImplements

classMethod

classProperty

conditionalExpression

continueStatement

debuggerStatement

declareClass

declareExportAllDeclaration

declareExportDeclaration

declareFunction

declareInterface

declareModule

declareModuleExports

declareTypeAlias

declareVariable

decorator

directive

directiveLiteral

doExpression

doWhileStatement

emptyStatement

emptyTypeAnnotation

existsTypeAnnotation

exportAllDeclaration

exportDefaultDeclaration

exportDefaultSpecifier

exportNamedDeclaration

exportNamespaceSpecifier

exportSpecifier

expressionStatement

file

forInStatement

forOfStatement

forStatement

functionDeclaration

functionExpression

functionTypeAnnotation

functionTypeParam

genericTypeAnnotation

identifier

ifStatement

import

importDeclaration

importDefaultSpecifier

importNamespaceSpecifier

importSpecifier

interfaceDeclaration

interfaceExtends

intersectionTypeAnnotation

jSXAttribute

jSXClosingElement