js Object key All In One

// 字面符号 / 初始化符号
obj  = {};

obj[0] = 'a';
// 'a'
obj;
// {0: 'a'}0: "a"[[Prototype]]: Object

obj[false] = true;
// true
obj;
// {0: 'a', false: true}0: "a"false: true[[Prototype]]: Object

obj[0];
// 'a'

obj[false];
// true

Object literal syntax vs JSON

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Object_initializer#object_literal_syntax_vs._json

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/Object

refs

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From： https://www.cnblogs.com/xgqfrms/p/16721225.html