How to get index of object by its property in JavaScript?

Since the sort part is already answered. I'm just going to propose another elegant way to get the indexOf of a property in your array

Your example is:

var Data = [
    {id_list:1, name:'Nick',token:'312312'},
    {id_list:2,name:'John',token:'123123'}
]

You can do:

var index = Data.map(function(e) { return e.name; }).indexOf('Nick');

Array.prototype.map is not available on IE7 or IE8. ES5 Compatibility

And here it is with ES6 and arrow syntax, which is even simpler:

const index = Data.map(e => e.name).indexOf('Nick');

If you're fine with using ES6. Arrays now have the findIndex function. Which means you can do something like this:

const index = Data.findIndex(item => item.name === 'John');

As the other answers suggest, looping through the array is probably the best way. But I would put it in it's own function, and make it a little more abstract:

function findWithAttr(array, attr, value) {
    for(var i = 0; i < array.length; i += 1) {
        if(array[i][attr] === value) {
            return i;
        }
    }
    return -1;
}

var Data = [
    {id_list: 2, name: 'John', token: '123123'},
    {id_list: 1, name: 'Nick', token: '312312'}
];

With this, not only can you find which one contains 'John' but you can find which contains the token '312312':

findWithAttr(Data, 'name', 'John'); // returns 0
findWithAttr(Data, 'token', '312312'); // returns 1
findWithAttr(Data, 'id_list', '10'); // returns -1

EDIT: Updated function to return -1 when not found so it follows the same construct as Array.prototype.indexOf()