@nkduy/babel-types
Advanced tools
This module contains methods for building ASTs manually and for checking the types of AST nodes.
npm install --save-dev @nkduy/babel-types
t.anyTypeAnnotation()
See also t.isAnyTypeAnnotation(node, opts) and t.assertAnyTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.arrayExpression(elements)
See also t.isArrayExpression(node, opts) and t.assertArrayExpression(node, opts).
Aliases: Expression
elements: Array<null | Expression | SpreadElement> (default: [])t.arrayPattern(elements, typeAnnotation)
See also t.isArrayPattern(node, opts) and t.assertArrayPattern(node, opts).
Aliases: Pattern, LVal
elements: Array<Expression> (required)typeAnnotation (required)decorators: Array<Decorator> (default: null)t.arrayTypeAnnotation(elementType)
See also t.isArrayTypeAnnotation(node, opts) and t.assertArrayTypeAnnotation(node, opts).
Aliases: Flow
elementType (required)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)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)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)t.awaitExpression(argument)
See also t.isAwaitExpression(node, opts) and t.assertAwaitExpression(node, opts).
Aliases: Expression, Terminatorless
argument: Expression (required)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)t.bindExpression(object, callee)
See also t.isBindExpression(node, opts) and t.assertBindExpression(node, opts).
Aliases: Expression
object (required)callee (required)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: [])t.booleanLiteral(value)
See also t.isBooleanLiteral(node, opts) and t.assertBooleanLiteral(node, opts).
Aliases: Expression, Pureish, Literal, Immutable
value: boolean (required)t.booleanLiteralTypeAnnotation()
See also t.isBooleanLiteralTypeAnnotation(node, opts) and t.assertBooleanLiteralTypeAnnotation(node, opts).
Aliases: Flow
t.booleanTypeAnnotation()
See also t.isBooleanTypeAnnotation(node, opts) and t.assertBooleanTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.breakStatement(label)
See also t.isBreakStatement(node, opts) and t.assertBreakStatement(node, opts).
Aliases: Statement, Terminatorless, CompletionStatement
label: Identifier (default: null)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)t.catchClause(param, body)
See also t.isCatchClause(node, opts) and t.assertCatchClause(node, opts).
Aliases: Scopable
param: Identifier (required)body: BlockStatement (required)t.classBody(body)
See also t.isClassBody(node, opts) and t.assertClassBody(node, opts).
body: Array<ClassMethod | ClassProperty> (required)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)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)t.classImplements(id, typeParameters)
See also t.isClassImplements(node, opts) and t.assertClassImplements(node, opts).
Aliases: Flow
id (required)typeParameters (required)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 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)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)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)t.continueStatement(label)
See also t.isContinueStatement(node, opts) and t.assertContinueStatement(node, opts).
Aliases: Statement, Terminatorless, CompletionStatement
label: Identifier (default: null)t.debuggerStatement()
See also t.isDebuggerStatement(node, opts) and t.assertDebuggerStatement(node, opts).
Aliases: Statement
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)t.declareFunction(id)
See also t.isDeclareFunction(node, opts) and t.assertDeclareFunction(node, opts).
Aliases: Flow, FlowDeclaration, Statement, Declaration
id (required)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)t.declareModule(id, body)
See also t.isDeclareModule(node, opts) and t.assertDeclareModule(node, opts).
Aliases: Flow, FlowDeclaration, Statement, Declaration
id (required)body (required)t.declareModuleExports(typeAnnotation)
See also t.isDeclareModuleExports(node, opts) and t.assertDeclareModuleExports(node, opts).
Aliases: Flow, FlowDeclaration, Statement, Declaration
typeAnnotation (required)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)t.declareVariable(id)
See also t.isDeclareVariable(node, opts) and t.assertDeclareVariable(node, opts).
Aliases: Flow, FlowDeclaration, Statement, Declaration
id (required)t.decorator(expression)
See also t.isDecorator(node, opts) and t.assertDecorator(node, opts).
expression: Expression (required)t.directive(value)
See also t.isDirective(node, opts) and t.assertDirective(node, opts).
value: DirectiveLiteral (required)t.directiveLiteral(value)
See also t.isDirectiveLiteral(node, opts) and t.assertDirectiveLiteral(node, opts).
value: string (required)t.doExpression(body)
See also t.isDoExpression(node, opts) and t.assertDoExpression(node, opts).
Aliases: Expression
body: BlockStatement (required)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)t.emptyStatement()
See also t.isEmptyStatement(node, opts) and t.assertEmptyStatement(node, opts).
Aliases: Statement
t.emptyTypeAnnotation()
See also t.isEmptyTypeAnnotation(node, opts) and t.assertEmptyTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.existentialTypeParam()
See also t.isExistentialTypeParam(node, opts) and t.assertExistentialTypeParam(node, opts).
Aliases: Flow
t.exportAllDeclaration(source)
See also t.isExportAllDeclaration(node, opts) and t.assertExportAllDeclaration(node, opts).
Aliases: Statement, Declaration, ModuleDeclaration, ExportDeclaration
source: StringLiteral (required)t.exportDefaultDeclaration(declaration)
See also t.isExportDefaultDeclaration(node, opts) and t.assertExportDefaultDeclaration(node, opts).
Aliases: Statement, Declaration, ModuleDeclaration, ExportDeclaration
declaration: FunctionDeclaration | ClassDeclaration | Expression (required)t.exportDefaultSpecifier(exported)
See also t.isExportDefaultSpecifier(node, opts) and t.assertExportDefaultSpecifier(node, opts).
Aliases: ModuleSpecifier
exported: Identifier (required)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)t.exportNamespaceSpecifier(exported)
See also t.isExportNamespaceSpecifier(node, opts) and t.assertExportNamespaceSpecifier(node, opts).
Aliases: ModuleSpecifier
exported: Identifier (required)t.exportSpecifier(local, exported)
See also t.isExportSpecifier(node, opts) and t.assertExportSpecifier(node, opts).
Aliases: ModuleSpecifier
local: Identifier (required)exported: Identifier (required)t.expressionStatement(expression)
See also t.isExpressionStatement(node, opts) and t.assertExpressionStatement(node, opts).
Aliases: Statement, ExpressionWrapper
expression: Expression (required)t.file(program, comments, tokens)
See also t.isFile(node, opts) and t.assertFile(node, opts).
program: Program (required)comments (required)tokens (required)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)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)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)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)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)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)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)t.functionTypeParam(name, typeAnnotation)
See also t.isFunctionTypeParam(node, opts) and t.assertFunctionTypeParam(node, opts).
Aliases: Flow
name (required)typeAnnotation (required)t.genericTypeAnnotation(id, typeParameters)
See also t.isGenericTypeAnnotation(node, opts) and t.assertGenericTypeAnnotation(node, opts).
Aliases: Flow
id (required)typeParameters (required)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)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)t.import()
See also t.isImport(node, opts) and t.assertImport(node, opts).
Aliases: Expression
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)t.importDefaultSpecifier(local)
See also t.isImportDefaultSpecifier(node, opts) and t.assertImportDefaultSpecifier(node, opts).
Aliases: ModuleSpecifier
local: Identifier (required)t.importNamespaceSpecifier(local)
See also t.isImportNamespaceSpecifier(node, opts) and t.assertImportNamespaceSpecifier(node, opts).
Aliases: ModuleSpecifier
local: Identifier (required)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)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)t.interfaceExtends(id, typeParameters)
See also t.isInterfaceExtends(node, opts) and t.assertInterfaceExtends(node, opts).
Aliases: Flow
id (required)typeParameters (required)t.intersectionTypeAnnotation(types)
See also t.isIntersectionTypeAnnotation(node, opts) and t.assertIntersectionTypeAnnotation(node, opts).
Aliases: Flow
types (required)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)t.jSXClosingElement(name)
See also t.isJSXClosingElement(node, opts) and t.assertJSXClosingElement(node, opts).
Aliases: JSX, Immutable
name: JSXIdentifier | JSXMemberExpression (required)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)t.jSXEmptyExpression()
See also t.isJSXEmptyExpression(node, opts) and t.assertJSXEmptyExpression(node, opts).
Aliases: JSX, Expression
t.jSXExpressionContainer(expression)
See also t.isJSXExpressionContainer(node, opts) and t.assertJSXExpressionContainer(node, opts).
Aliases: JSX, Immutable
expression: Expression (required)t.jSXIdentifier(name)
See also t.isJSXIdentifier(node, opts) and t.assertJSXIdentifier(node, opts).
Aliases: JSX, Expression
name: string (required)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)t.jSXNamespacedName(namespace, name)
See also t.isJSXNamespacedName(node, opts) and t.assertJSXNamespacedName(node, opts).
Aliases: JSX
namespace: JSXIdentifier (required)name: JSXIdentifier (required)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)t.jSXSpreadAttribute(argument)
See also t.isJSXSpreadAttribute(node, opts) and t.assertJSXSpreadAttribute(node, opts).
Aliases: JSX
argument: Expression (required)t.jSXSpreadChild(expression)
See also t.isJSXSpreadChild(node, opts) and t.assertJSXSpreadChild(node, opts).
Aliases: JSX, Immutable
expression: Expression (required)t.jSXText(value)
See also t.isJSXText(node, opts) and t.assertJSXText(node, opts).
Aliases: JSX, Immutable
value: string (required)t.labeledStatement(label, body)
See also t.isLabeledStatement(node, opts) and t.assertLabeledStatement(node, opts).
Aliases: Statement
label: Identifier (required)body: Statement (required)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)t.memberExpression(object, property, computed)
See also t.isMemberExpression(node, opts) and t.assertMemberExpression(node, opts).
Aliases: Expression, LVal
object: Expression (required)propertyif computed then Expression else Identifier (required)computed: boolean (default: false)t.metaProperty(meta, property)
See also t.isMetaProperty(node, opts) and t.assertMetaProperty(node, opts).
Aliases: Expression
meta: string (required)property: string (required)t.mixedTypeAnnotation()
See also t.isMixedTypeAnnotation(node, opts) and t.assertMixedTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
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)t.noop()
See also t.isNoop(node, opts) and t.assertNoop(node, opts).
t.nullLiteral()
See also t.isNullLiteral(node, opts) and t.assertNullLiteral(node, opts).
Aliases: Expression, Pureish, Literal, Immutable
t.nullLiteralTypeAnnotation()
See also t.isNullLiteralTypeAnnotation(node, opts) and t.assertNullLiteralTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.nullableTypeAnnotation(typeAnnotation)
See also t.isNullableTypeAnnotation(node, opts) and t.assertNullableTypeAnnotation(node, opts).
Aliases: Flow
typeAnnotation (required)t.numberTypeAnnotation()
See also t.isNumberTypeAnnotation(node, opts) and t.assertNumberTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.numericLiteral(value)
See also t.isNumericLiteral(node, opts) and t.assertNumericLiteral(node, opts).
Aliases: Expression, Pureish, Literal, Immutable
value: number (required)t.numericLiteralTypeAnnotation()
See also t.isNumericLiteralTypeAnnotation(node, opts) and t.assertNumericLiteralTypeAnnotation(node, opts).
Aliases: Flow
t.objectExpression(properties)
See also t.isObjectExpression(node, opts) and t.assertObjectExpression(node, opts).
Aliases: Expression
properties: Array<ObjectMethod | ObjectProperty | SpreadProperty> (required)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 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)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)t.objectProperty(key, value, computed, shorthand, decorators)
See also t.isObjectProperty(node, opts) and t.assertObjectProperty(node, opts).
Aliases: UserWhitespacable, Property, ObjectMember
keyif computed then Expression else Identifier | Literal (required)value: Expression (required)computed: boolean (default: false)shorthand: boolean (default: false)decorators: Array<Decorator> (default: null)t.objectTypeAnnotation(properties, indexers, callProperties)
See also t.isObjectTypeAnnotation(node, opts) and t.assertObjectTypeAnnotation(node, opts).
Aliases: Flow
properties (required)indexers (required)callProperties (required)t.objectTypeCallProperty(value)
See also t.isObjectTypeCallProperty(node, opts) and t.assertObjectTypeCallProperty(node, opts).
Aliases: Flow, UserWhitespacable
value (required)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)t.objectTypeProperty(key, value)
See also t.isObjectTypeProperty(node, opts) and t.assertObjectTypeProperty(node, opts).
Aliases: Flow, UserWhitespacable
key (required)value (required)t.parenthesizedExpression(expression)
See also t.isParenthesizedExpression(node, opts) and t.assertParenthesizedExpression(node, opts).
Aliases: Expression, ExpressionWrapper
expression: Expression (required)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: [])t.qualifiedTypeIdentifier(id, qualification)
See also t.isQualifiedTypeIdentifier(node, opts) and t.assertQualifiedTypeIdentifier(node, opts).
Aliases: Flow
id (required)qualification (required)t.regExpLiteral(pattern, flags)
See also t.isRegExpLiteral(node, opts) and t.assertRegExpLiteral(node, opts).
Aliases: Expression, Literal
pattern: string (required)flags: string (default: '')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)t.restProperty(argument)
See also t.isRestProperty(node, opts) and t.assertRestProperty(node, opts).
Aliases: UnaryLike
argument: LVal (required)t.returnStatement(argument)
See also t.isReturnStatement(node, opts) and t.assertReturnStatement(node, opts).
Aliases: Statement, Terminatorless, CompletionStatement
argument: Expression (default: null)t.sequenceExpression(expressions)
See also t.isSequenceExpression(node, opts) and t.assertSequenceExpression(node, opts).
Aliases: Expression
expressions: Array<Expression> (required)t.spreadElement(argument)
See also t.isSpreadElement(node, opts) and t.assertSpreadElement(node, opts).
Aliases: UnaryLike
argument: Expression (required)t.spreadProperty(argument)
See also t.isSpreadProperty(node, opts) and t.assertSpreadProperty(node, opts).
Aliases: UnaryLike
argument: Expression (required)t.stringLiteral(value)
See also t.isStringLiteral(node, opts) and t.assertStringLiteral(node, opts).
Aliases: Expression, Pureish, Literal, Immutable
value: string (required)t.stringLiteralTypeAnnotation()
See also t.isStringLiteralTypeAnnotation(node, opts) and t.assertStringLiteralTypeAnnotation(node, opts).
Aliases: Flow
t.stringTypeAnnotation()
See also t.isStringTypeAnnotation(node, opts) and t.assertStringTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.super()
See also t.isSuper(node, opts) and t.assertSuper(node, opts).
Aliases: Expression
t.switchCase(test, consequent)
See also t.isSwitchCase(node, opts) and t.assertSwitchCase(node, opts).
test: Expression (default: null)consequent: Array<Statement> (required)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)t.taggedTemplateExpression(tag, quasi)
See also t.isTaggedTemplateExpression(node, opts) and t.assertTaggedTemplateExpression(node, opts).
Aliases: Expression
tag: Expression (required)quasi: TemplateLiteral (required)t.templateElement(value, tail)
See also t.isTemplateElement(node, opts) and t.assertTemplateElement(node, opts).
value (required)tail: boolean (default: false)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)t.thisExpression()
See also t.isThisExpression(node, opts) and t.assertThisExpression(node, opts).
Aliases: Expression
t.thisTypeAnnotation()
See also t.isThisTypeAnnotation(node, opts) and t.assertThisTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
t.throwStatement(argument)
See also t.isThrowStatement(node, opts) and t.assertThrowStatement(node, opts).
Aliases: Statement, Terminatorless, CompletionStatement
argument: Expression (required)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)t.tupleTypeAnnotation(types)
See also t.isTupleTypeAnnotation(node, opts) and t.assertTupleTypeAnnotation(node, opts).
Aliases: Flow
types (required)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)t.typeAnnotation(typeAnnotation)
See also t.isTypeAnnotation(node, opts) and t.assertTypeAnnotation(node, opts).
Aliases: Flow
typeAnnotation (required)t.typeCastExpression(expression, typeAnnotation)
See also t.isTypeCastExpression(node, opts) and t.assertTypeCastExpression(node, opts).
Aliases: Flow, ExpressionWrapper, Expression
expression (required)typeAnnotation (required)t.typeParameter(bound)
See also t.isTypeParameter(node, opts) and t.assertTypeParameter(node, opts).
Aliases: Flow
bound (required)t.typeParameterDeclaration(params)
See also t.isTypeParameterDeclaration(node, opts) and t.assertTypeParameterDeclaration(node, opts).
Aliases: Flow
params (required)t.typeParameterInstantiation(params)
See also t.isTypeParameterInstantiation(node, opts) and t.assertTypeParameterInstantiation(node, opts).
Aliases: Flow
params (required)t.typeofTypeAnnotation(argument)
See also t.isTypeofTypeAnnotation(node, opts) and t.assertTypeofTypeAnnotation(node, opts).
Aliases: Flow
argument (required)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)t.unionTypeAnnotation(types)
See also t.isUnionTypeAnnotation(node, opts) and t.assertUnionTypeAnnotation(node, opts).
Aliases: Flow
types (required)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)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)t.variableDeclarator(id, init)
See also t.isVariableDeclarator(node, opts) and t.assertVariableDeclarator(node, opts).
id: LVal (required)init: Expression (default: null)t.voidTypeAnnotation()
See also t.isVoidTypeAnnotation(node, opts) and t.assertVoidTypeAnnotation(node, opts).
Aliases: Flow, FlowBaseAnnotation
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)t.withStatement(object, body)
See also t.isWithStatement(node, opts) and t.assertWithStatement(node, opts).
Aliases: Statement
object (required)body: BlockStatement | Statement (required)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)FAQs
Babel Types is a Lodash-esque utility library for AST nodes
We found that @nkduy/babel-types demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Research
The Socket Research Team breaks down a malicious wrapper package that uses obfuscation to harvest credentials and exfiltrate sensitive data.
Research
Security News
Attackers used a malicious npm package typosquatting a popular ESLint plugin to steal sensitive data, execute commands, and exploit developer systems.
Security News
The Ultralytics' PyPI Package was compromised four times in one weekend through GitHub Actions cache poisoning and failure to rotate previously compromised API tokens.