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    <p>To rotate a DIV we can add some CSS that, well, rotates the DIV using CSS transform rotate.</p> <p>To toggle the rotation we can keep a flag, a simple variable with a boolean value that tells us what way to rotate.</p> <pre><code>var rotated = false; document.getElementById('button').onclick = function() { var div = document.getElementById('div'), deg = rotated ? 0 : 66; div.style.webkitTransform = 'rotate('+deg+'deg)'; div.style.mozTransform = 'rotate('+deg+'deg)'; div.style.msTransform = 'rotate('+deg+'deg)'; div.style.oTransform = 'rotate('+deg+'deg)'; div.style.transform = 'rotate('+deg+'deg)'; rotated = !rotated; } </code></pre> <p><div class="snippet" data-lang="js" data-hide="true" data-console="false" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-js lang-js prettyprint-override"><code>var rotated = false; document.getElementById('button').onclick = function() { var div = document.getElementById('div'), deg = rotated ? 0 : 66; div.style.webkitTransform = 'rotate('+deg+'deg)'; div.style.mozTransform = 'rotate('+deg+'deg)'; div.style.msTransform = 'rotate('+deg+'deg)'; div.style.oTransform = 'rotate('+deg+'deg)'; div.style.transform = 'rotate('+deg+'deg)'; rotated = !rotated; }</code></pre> <pre class="snippet-code-css lang-css prettyprint-override"><code>#div { position:relative; height: 200px; width: 200px; margin: 30px; background: red; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;button id="button"&gt;rotate&lt;/button&gt; &lt;br /&gt;&lt;br /&gt; &lt;div id="div"&gt;&lt;/div&gt;</code></pre> </div> </div> </p> <p>To add some animation to the rotation all we have to do is add CSS transitions</p> <pre><code>div { -webkit-transition: all 0.5s ease-in-out; -moz-transition: all 0.5s ease-in-out; -o-transition: all 0.5s ease-in-out; transition: all 0.5s ease-in-out; } </code></pre> <p><div class="snippet" data-lang="js" data-hide="true" data-console="false" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-js lang-js prettyprint-override"><code>var rotated = false; document.getElementById('button').onclick = function() { var div = document.getElementById('div'), deg = rotated ? 0 : 66; div.style.webkitTransform = 'rotate('+deg+'deg)'; div.style.mozTransform = 'rotate('+deg+'deg)'; div.style.msTransform = 'rotate('+deg+'deg)'; div.style.oTransform = 'rotate('+deg+'deg)'; div.style.transform = 'rotate('+deg+'deg)'; rotated = !rotated; }</code></pre> <pre class="snippet-code-css lang-css prettyprint-override"><code>#div { position:relative; height: 200px; width: 200px; margin: 30px; background: red; -webkit-transition: all 0.5s ease-in-out; -moz-transition: all 0.5s ease-in-out; -o-transition: all 0.5s ease-in-out; transition: all 0.5s ease-in-out; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;button id="button"&gt;rotate&lt;/button&gt; &lt;br /&gt;&lt;br /&gt; &lt;div id="div"&gt;&lt;/div&gt;</code></pre> </div> </div> </p> <p>Another way to do it is using classes, and setting all the styles in a stylesheet, thus keeping them out of the javascript</p> <pre><code>document.getElementById('button').onclick = function() { document.getElementById('div').classList.toggle('rotated'); } </code></pre> <p><div class="snippet" data-lang="js" data-hide="true" data-console="false" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-js lang-js prettyprint-override"><code>document.getElementById('button').onclick = function() { document.getElementById('div').classList.toggle('rotated'); }</code></pre> <pre class="snippet-code-css lang-css prettyprint-override"><code>#div { position:relative; height: 200px; width: 200px; margin: 30px; background: red; -webkit-transition: all 0.5s ease-in-out; -moz-transition: all 0.5s ease-in-out; -o-transition: all 0.5s ease-in-out; transition: all 0.5s ease-in-out; } #div.rotated { -webkit-transform : rotate(66deg); -moz-transform : rotate(66deg); -ms-transform : rotate(66deg); -o-transform : rotate(66deg); transform : rotate(66deg); }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;button id="button"&gt;rotate&lt;/button&gt; &lt;br /&gt;&lt;br /&gt; &lt;div id="div"&gt;&lt;/div&gt;</code></pre> </div> </div> </p>
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    1. COPerfect! Is there a way to add some easing to the rotation?
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    2. COjQuery's animate() will animate the rotation, and the solution above could also be done by simply swapping classes and using css transitions.
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    3. CO@user2078845 -> http://jsfiddle.net/WurNc/1/
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