makeClassES5Compatible() function makeClassES5Compatible() function makeClassES5Compatible() function This API is provided as a preview for developers and may change based on ...
Migrating to TypeScript Migrating to TypeScript TypeScript is a superset of ES6 and, as its name suggests, uses a type system.This can have an enormous impact on developer tool...
Duplicate Object Literal Properties Duplicate Object Literal Properties ECMAScript 5 strict mode introduced a check for duplicate object literal properties that would throw an ...
14. Symbol Symbol 是一种新的数据类型,它的值是唯一的,不可变的。ES6 中提出 symbol 的目的是为了生成一个唯一的标识符,不过你访问不到这个标识符: var sym = Symbol ( "some optional description" ); console . log ( typeof sym )...