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javascript - How I can set property of object properties?(js)

问题描述

I using js and i want set property of object properties 

var a=42
Object.defineProperty(this,"a",{value:43} )//Error

How I can set property of object properties after defining.

标签： javascriptobjectdefineproperty

解决方案

这对于诸如以下的对象是可能的Number：

var a = new Number(42)

a.value = 43

console.log( a.value )

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