Emerging Best Practices for Block Bindings Emerging Best Practices for Block Bindings While ECMAScript 6 was in development, there was widespread belief you should use let by ...
Sets and Maps Sets and Maps JavaScript only had one type of collection, represented by the Array type, for most of its history (though some may argue all non-array objects are...
Duplicate Object Literal Properties Duplicate Object Literal Properties ECMAScript 5 strict mode introduced a check for duplicate object literal properties that would throw an ...
Retrieving Symbol Properties Retrieving Symbol Properties The Object.keys() and Object.getOwnPropertyNames() methods can retrieve all property names in an object. The former ...
4.5 The global environment 4.5.1 Script scope and module scopes 4.5.2 Creating variables: declarative record vs. object record 4.5.3 Getting or setting variables 4.5.4 Global EC...
Set 与 Map(Sets and Maps) 本章小结 ECMAScript 5 中的 set 与 map(Sets and Maps in ECMAScript 5) " level="3"> ECMAScript 5 中的 set 与 map(Sets and Maps in ECMAScript 5) 使用对象模拟的问题(Problem...