How to delete object attributes in javascript

JS method to delete object properties: 1. Use the deleteProperty method, the syntax "Reflect.deleteProperty (array name, "name of the element object")"; 2. Use the delete keyword, the syntax "delete array name. Attributes".

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, Dell G3 computer.

Method 1: Use the deleteProperty static method of the Reflect object in ES6

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var a = {aa: 1,bb:2}
Reflect.deleteProperty(a, 'aa')

method 2: Using the delete keyword

delete obj.age
console.log(obj) // { name: 'xiaoming', id: 2 }

delete can only delete the attributes on the object, but not the defined variables, and this Operator/behavior is very slow

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