Is there a way to traverse objects in es6?

have. Traversal method: 1. "for...in" statement, traverses the object's own and inherited enumerable properties; 2. Object.keys(), traverses the property names; 3. Object.getOwnPropertyNames(), traverses the properties Name to traverse; 4. Object.getOwnPropertySymbols(), traverse all Symbol properties; 5. Reflect.ownKeys(), traverse all properties.

The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.

es6 6 ways to traverse objects

(1) for...in

for. ..inLoop through the object's own and inherited enumerable properties (excluding Symbol properties).

const obj = {
id:1,
name:‘zhangsan’,
age:18
}
for(let key in obj){
console.log(key + ‘—’ + obj[key])
}

（2）Object.keys(obj)

Object.keysReturn An array containing the keys of all enumerable properties (excluding Symbol properties) of the object itself (excluding inherited ones).

(3) Object.getOwnPropertyNames(obj)

Object.getOwnPropertyNamesReturns an array containing The key names of all properties of the object itself (excluding Symbol properties, but including non-enumerable properties).

(4) Object.getOwnPropertySymbols(obj)

Object.getOwnPropertySymbolsReturns an array containing Key names for all Symbol properties of the object itself.

(5) Reflect.ownKeys(obj)

Reflect.ownKeysReturns an array containing All key names of the object itself (excluding inherited ones), regardless of whether the key name is a Symbol or a string, and whether it is enumerable or not.

The above 5 methods traverse the key names of the object and all follow the same order rules of attribute traversal.

• First traverse all numeric keys and arrange them in ascending order of value.
• Secondly, traverse all string keys and sort them in ascending order by joining time.

• Finally traverse all Symbol keys and sort them in ascending order according to their joining time.

(5) Reflect.enumerate(obj)

Reflect.enumerate(obj), returns an Iterator object, traverses the sum of the object itself All inherited enumerable properties (excluding Symbol properties) are the same as the for...in loop.

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