Question

Let’s say I have the following object:

var VariableName = {
    firstProperty: 1,
    secondProperty: 2
}

Do I have to wrap the object properties in quotes like this?

var VariableName = {
    'firstProperty': 1,
    'secondProperty': 2
}

Is this Single quotes in JavaScript object literal the correct answer?

Answer 1

No, you don’t need to do that.

The only reasons to quote object-keys are

• the property name is reserved/used by the browser/js engine (eg. “class” in IE)
• you have special characters or white spaces in your key

so for instance

var VariableName = {
    "some-prop": 42,  // needs quotation because of `-`
    "class": 'foobar' // doesn't syntatically require quotes, but it will fail on some IEs
    valid: 'yay' // no quotes required
};