Backbone 101: Model Methods

by kyllle

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0-alpha1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.2.2/backbone-min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/3.0.3/normalize.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone-localstorage.js/1.1.16/backbone.localStorage-min.js"></script>
<h2 class="pg-heading">Model methods</h2>
<p>This example simply toggles the watchlist boolean by directly referencing toggleWatchlist from the model.</p>

<h3>Output</h3>
<pre class="js-logs"></pre>

CSS

@import url(http://fonts.googleapis.com/css?family=Roboto:300,400,500);

* {
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
    font-family: Roboto;
    padding: 16px;
    line-height: 1.5;
    font-weight: normal;
    color: #ccc;
    background: #292929;
    font-size: 18px;
}

h1, h2, h3 {
    font-weight: normal;
}

.pg-heading {
    margin-bottom: 0;
}

a {
    color: #95baf6;
    transition: opacity .3s;
}

a:hover {
    opacity: 0.75;
}

input {
    border: none;
    height: 40px;
    outline: none;
    padding: 0 8px;
}



input[type=submit] {
    padding: 0 16px;
    background: #2196F3;
    color: white;
    transition: background .3s;
}

input[type=submit]:hover {
    background: #1E88E5;
}

input[type=submit]:active {
    background: #1976D2;
}

input[type=text] {
    transition: border-color .3s;
    border: 1px solid white;    
}

input.error {
    border: 1px solid #F44336;
}

pre {
    display: block;
    padding: 9.5px;
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.428571429;
    color: #333;
    word-break: break-all;
    word-wrap: break-word;
    background-color: #f5f5f5;
    border: 1px solid #ccc;
    border-radius: 4px;
}

JavaScript

console.clear();

// Set up contact model
var Movie = Backbone.Model.extend({
    
    defaults: {
        watchlist: false,
        rated: false
    },
    
    toggleWatchlist: function() {
        return this.set('watchlist', !this.get('watchlist'));
    }
});

// Create some instances
var movie = new Movie();

$('.js-logs').append('1) Movie watchlist = '+movie.get('watchlist')).append('<br>');

// Run model.toggleWatchlist
movie.toggleWatchlist();

$('.js-logs').append('2) Movie watchlist = '+movie.get('watchlist'));