no-useless-computed-key.md

Disallow unnecessary computed property keys on objects (no-useless-computed-key)

It's unnecessary to use computed properties with literals such as:

var foo = {["a"]: "b"};

The code can be rewritten as:

var foo = {"a": "b"};

Rule Details

This rule disallows unnecessary usage of computed property keys.

Examples of incorrect code for this rule:

/*eslint no-useless-computed-key: "error"*/
/*eslint-env es6*/

var a = { ['0']: 0 };
var a = { ['0+1,234']: 0 };
var a = { [0]: 0 };
var a = { ['x']: 0 };
var a = { ['x']() {} };

Examples of correct code for this rule:

/*eslint no-useless-computed-key: "error"*/

var c = { 'a': 0 };
var c = { 0: 0 };
var a = { x() {} };
var c = { a: 0 };
var c = { '0+1,234': 0 };

When Not To Use It

If you don't want to be notified about unnecessary computed property keys, you can safely disable this rule.