Get Query Parameters by Name in JavaScript

Here’s a utility function to get URL’s query parameters by name. function getParameterByName(name, url) { if (!url) url = window.location.href; name = name.replace(/[\[\]]/g, ‘\\$&’); var regex = new RegExp(‘[?&]’ + name + ‘(=([^&#]*)|&|#|$)’), results = regex.exec(url); if (!results) return null; if (!results[2]) return ”; return decodeURIComponent(results[2].replace(/\+/g, ‘ ‘)); } The url parameter is optional if […]

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Set Focus to End of Text Input using Javascript and jQuery

If the text input already has some text and you wish to set the cursor to the end of the text input then here’s how it can be done. Using JavaScript In javascript simply add a onfocus event handler in the text input. <input type=”text” onfocus=”this.value = this.value;” value=”Some text”/> Using jQuery Define a function […]

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How to get Base64 image from an URL or Image tag

You might need to convert a png/jpeg image to a base64 encoding. The following function does that for you. function getBase64FromImageUrl(url) { var img = new Image(); img.setAttribute(‘crossOrigin’, ‘anonymous’); img.onload = function () { var canvas = document.createElement(“canvas”); canvas.width =this.width; canvas.height =this.height; var ctx = canvas.getContext(“2d”); ctx.drawImage(this, 0, 0); var dataURL = canvas.toDataURL(“image/png”); var url= […]

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