Tagged: javascript

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Introduction to Javascript Programming Language

Javascript is scripting language very popular among developers. Javascript is the programming language of the web. In the recents years Javascript popularity is higher than before because it gained a lot of features with new browsers technologies. There browsers, mobile devices, desktop, game consoles use Javascript. History Javascript initially designed...

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Html Text Input Allow Only Numeric Input

Applications expecting numeric values for the input is generally a pain for developers. Because we have to check given values whether they are number or alphabet. We have some text input element for html. We want to get the number of the person. How can we achieve that easily? Pure...

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How To Get Query String From Url With Javascript?

Query string is part of URL. After question mark query string begins with simple key-value pairs. Popular JavaScript frameworks provide libraries to get query string with JavaScript. But how can we get it with pure JavaScript without using any JavaScript framework? getParameterByName() Function First we create a function to to...

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How To Use Javascript Closures

What is closure? How can we use closure in our codes? etc. We can ask a lot of question about closures. Here is what are closures. Closure is a wrapper for different entities like functions. Closure Scope Closure is a block or scope of code where it has own environment...

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JavaScript “Uncaught TypeError: Cannot set property ‘…’ of null ” Error Solutions

While writing JavaScript beginners get a lot of Uncaught TypeError: Cannot set property ‘…’ of null error message so what is the problem with the code? Define Object During JavaScript Initialization Here is number one reason the object you try to access is not defined. It may define later. It is...

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