How can I attach a window resize event listener in JavaScript?
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<span>2020-12-05 10:36</span>
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<p>You don't resize the document but the window. This works :</p>
<pre><code>window.addEventListener("resize", function(){console.log('resize!')}, true);
</code></pre>
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<span>2020-12-05 10:43</span>
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<p>Since you are trying to call this function on the resize of the window, you will want to bind the function to the window and not to the document. To support versions of IE that are less than 9, you will want to use <code>attachEvent</code>. Please note that <code>attachEvent</code> requires you to specify the <code>on</code> keyword. Here is an example:</p>
<pre><code>if(window.attachEvent) {
window.attachEvent('onresize', function() {
alert('attachEvent - resize');
});
}
else if(window.addEventListener) {
window.addEventListener('resize', function() {
console.log('addEventListener - resize');
}, true);
}
else {
//The browser does not support Javascript event binding
}
</code></pre>
<p>Similarly, you can remove events in the same way. When using <code>removeEventListener</code>, make sure that you pass the same value of <code>useCapture</code> as you did when calling <code>addEventListener</code>. This is the third parameter which is the <code>true/false</code> value.</p>
<pre><code>if(window.detachEvent) {
window.detachEvent('onresize', theFunction);
}
else if(window.removeEventListener) {
window.removeEventListener('resize', theFunction, true);
}
else {
//The browser does not support Javascript event binding
}
</code></pre>
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