In this short tip post, we will learn how to validate an email address in JavaScript using Regular expressions. Objective Validate the input email address using Regular expression in plain JavaScript. Approach Email addresses are consists of two parts: Local part Domain part Local part can be a combination of strings, numbers and alphanumeric and …
In this short tip post, we will learn how to encode a URL using JavaScript native function. Encoding a URL is a very important security aspect. Objective To encode and decode the given URL address. Approach We can use JavaScript native encodeURI() and encodeURIComponent() function to encode the URL’s. encodeURI() cannot encode the ~!@#$&*()=:/,;?+ characters. …
In this short tip post, we will learn how to remove a particular element from an array in JavaScript. Objective For a given array and an element, our code should find and delete that element (if exists) from an array and returns us new array. Approach We need to first find the position of an …
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In this short tip post, we will learn how to capitalize (change it to Uppercase) the first letter of a string using JavaScript. Objective To change the first letter of a string to uppercase using JavaScript. Approach We can use charAt and slice() function to change the first letter case to uppercase. We can use …
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In this short tip post, we will learn how to replace all occurrence of a string in JavaScript. Objective Finding the occurrences of a given string and replacing them with the given word. Approach There are two approaches: Using RegEx Using JavaScript Split() and Join() method Code We can use Regular expression to this task. …
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In this short tip post, we will learn how to clone the existing array in JavaScript. Objective Create a copy of the array using JavaScript function. Approach Generally, people do the iteration over the existing array and copy each element to new array to create a clone. We can use slice() function to create the …
In this short tip post, we will learn how to perform redirection to another webpage using JavaScript. Objective We need to redirect the user to another webpage on a particular event, say when user clicks on a button. Approach We can use window.location.href function of JavaScript to achieve the same. Code Here is the code. …
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In this short tip post, we will learn how to check if a string contains a substring using JavaScript. Objective We need to check whether the given word is present in the string as a substring. Approach We can use JavaScript indexOf() method to achieve the same. We can also use ES6 includes() method. Code …
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In this short tip post, we will learn how to find out if a Date object represents a today DateTime. Objective To determine if a JavaScript Date object instance is a representation of a date/time that is “today”. Approach By using a JavaScript Date instance, we can use the getDate(), getMonth() and getFullYear() methods, which …
We all love Ajax, don’t we? And there is an obvious reason. Ajax is great for user experience. In this tutorial, I am going to build an application using Node.js that will let the user upload files using Ajax instead of conventional upload that requires a browser refresh action to see the change. LIVE DEMO …