Install
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(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)
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')keyif computed thenExpressionelseIdentifier | 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)
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)
declareOpaqueType
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
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
existentialTypeParam
t.existentialTypeParam()
See also t.isExistentialTypeParam(node, opts) and t.assertExistentialTypeParam(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)
forAwaitStatement
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
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)
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)
See also t.isMemberExpression(node, opts) and t.assertMemberExpression(node, opts).
Aliases: Expression, LVal
object:Expression(required)propertyif computed thenExpressionelseIdentifier(required)computed:boolean(default:false)
metaProperty
t.metaProperty(meta, property)
See also t.isMetaProperty(node, opts) and t.assertMetaProperty(node, opts).
Aliases: Expression
meta:string(required)property:string(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)
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)
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)
numericLiteralTypeAnnotation
t.numericLiteralTypeAnnotation()
See also t.isNumericLiteralTypeAnnotation(node, opts) and t.assertNumericLiteralTypeAnnotation(node, opts).
Aliases: Flow
objectExpression
t.objectExpression(properties)
See also t.isObjectExpression(node, opts) and t.assertObjectExpression(node, opts).
Aliases: Expression
properties:Array<ObjectMethod | ObjectProperty | SpreadProperty>(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')keyif computed thenExpressionelseIdentifier | 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<RestProperty | 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
keyif computed thenExpressionelseIdentifier | 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)
opaqueType
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
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)
restProperty
t.restProperty(argument)
See also t.isRestProperty(node, opts) and t.assertRestProperty(node, opts).
Aliases: UnaryLike
argument:LVal(required)
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)
spreadProperty
t.spreadProperty(argument)
See also t.isSpreadProperty(node, opts) and t.assertSpreadProperty(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)
