140 lines
No EOL
5.6 KiB
HTML
140 lines
No EOL
5.6 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Mithril</title>
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<link href="http://fonts.googleapis.com/css?family=Open+Sans:300italic" rel="stylesheet" />
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<link href="lib/prism/prism.css" rel="stylesheet" />
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<link href="style.css" rel="stylesheet" />
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</head>
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<body>
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<header>
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<nav class="container">
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<a href="index.html" class="logo"><span>○</span> Mithril</a>
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<a href="getting-started.html">Guide</a>
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<a href="mithril.html">API</a>
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<a href="mithril.min.zip">Download</a>
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<a href="http://github.com/lhorie/mithril.js" target="_blank">Github</a>
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</nav>
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</header>
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<main>
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<section class="content">
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<div class="container">
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<div class="row">
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<div class="col(3,3,12)">
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<h2 id="api">API (v0.1.3)</h2>
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<h3 id="core">Core</h3>
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<ul>
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<li><a href="mithril.html">m</a></li>
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<li><a href="mithril.prop.html">m.prop</a></li>
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<li><a href="mithril.withAttr.html">m.withAttr</a></li>
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<li><a href="mithril.module.html">m.module</a></li>
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<li><a href="mithril.trust.html">m.trust</a></li>
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<li><a href="mithril.render.html">m.render</a></li>
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<li><a href="mithril.redraw.html">m.redraw</a></li>
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</ul>
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<h3 id="routing">Routing</h3>
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<ul>
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<li><a href="mithril.route.html">m.route</a>
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<ul>
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<li><a href="mithril.route.html#defining-routes">m.route(rootElement, defaultRoute, routes)</a></li>
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<li><a href="mithril.route.html#redirecting">m.route(path)</a></li>
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<li><a href="mithril.route.html#mode-abstraction">m.route(element)</a></li>
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<li><a href="mithril.route.html#mode">m.route.mode</a></li>
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<li><a href="mithril.route.html#param">m.route.param</a></li>
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</ul>
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</li>
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</ul>
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<h3 id="data">Data</h3>
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<ul>
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<li><a href="mithril.request.html">m.request</a></li>
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<li><a href="mithril.deferred.html">m.deferred</a></li>
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<li><a href="mithril.sync.html">m.sync</a></li>
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<li><a href="mithril.computation.html">m.startComputation / m.endComputation</a></li>
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</ul>
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<h2 id="archive">History</h2>
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<ul>
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<li><a href="roadmap.html">Roadmap</a></li>
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<li><a href="change-log.html">Change log</a></li>
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</ul>
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</div>
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<div class="col(9,9,12)">
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<h2 id="m-prop">m.prop</h2>
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<p>This is a getter-setter factory utility. It returns a function that stores information</p>
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<hr>
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<h3 id="usage">Usage</h3>
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<pre><code class="lang-javascript">//define a getter-setter with initial value `John`
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var name = m.prop("John");
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//read the value
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var a = name(); //a == "John"
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//set the value to `Mary`
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name("Mary"); //Mary
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//read the value
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var b = name(); //b == "Mary"</code></pre>
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<p>It can be used in conjunction with <a href="mithril.withattr"><code>m.withAttr</code></a> to implement data binding in the view-to-model direction and to provide uniform data access for model entity properties.</p>
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<pre><code class="lang-javascript">//a contrived example of bi-directional data binding
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var user = {
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model: function(name) {
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this.name = m.prop(name);
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},
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controller: function() {
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this.user = new user.model("John Doe");
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},
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view: function(controller) {
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m.render("body", [
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m("input", {onchange: m.withAttr("value", controller.user.name), value: controller.user.name()})
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]);
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}
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};</code></pre>
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<p>In the example above, the usage of <code>m.prop</code> allows the developer to change the implementation of the user name getter/setter without the need for code changes in the controller and view.</p>
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<p><code>m.prop</code> can also be used in conjunction with <a href="mithril.request"><code>m.request</code></a> and <a href="mithril.deferred"><code>m.deferred</code></a> to bind data on completion of an asynchronous operation.</p>
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<pre><code class="lang-javascript">var users = m.prop([]);
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var error = m.prop("");
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m.request({method: "GET", url: "/users"})
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.then(users, error); //on success, `users` will be populated, otherwise `error` will be populated
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//assuming the response contains the following data: `[{name: "John"}, {name: "Mary"}]`
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//then when resolved (e.g. in a view), the `users` getter-setter will contain a list of User instances
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//i.e. users()[0].name() == "John"</code></pre>
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<hr>
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<h3 id="signature">Signature</h3>
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<p><a href="how-to-read-signatures.html">How to read signatures</a></p>
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<pre><code class="lang-clike">GetterSetter prop([any initialValue])
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where:
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GetterSetter :: any getterSetter([any value])</code></pre>
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<ul>
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<li><p><strong>any initialValue</strong> (optional)</p>
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<p>An initialization value. If not provided, the value of the getter-setter's internal store defaults to <code>undefined</code>.</p>
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</li>
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<li><p><strong>returns any getterSetter([any value])</strong></p>
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<p>A getter-setter method.</p>
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<ul>
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<li><p><strong>any value</strong> (optional)</p>
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<p>If provided, it updates the getter-setter's internal store to the provided value.</p>
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<p>If not provided, return the current internally stored value.</p>
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</li>
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<li><p><strong>returns any value</strong></p>
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<p>This method always returns the value of the internal store, regardless of whether it was updated or not.</p>
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</li>
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</ul>
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</li>
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</ul>
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</div>
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</div>
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</div>
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</section>
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</main>
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<footer>
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<div class="container">
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Released under the <a href="http://opensource.org/licenses/MIT" target="_blank">MIT license</a>
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<br />© 2014 Leo Horie
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</div>
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</footer>
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