* If you want to update / add single style in DOM Element style attribute you can use this function:

Now, we’ll be using a small JavaScript snippet to add custom CSS and check if we can hide the pop-up. In this example, the iframe element with ID wallIframe contains the pop-up with some fading background in the back. Open your Chrome developer tools by pressing F12, then identify the element with the pop-up. Locating DOM Elements and Creating the Injection Code For this tutorial, I am using The Washington Post’s website: Screenshot showing The Washington Post’s website with an article mentioning Andrew Yang, also Chrome’s developer tools. This small extension allows you to run JavaScript on any website automatically, and it saves the code for future visits in your web browser.įirst, visit the website with annoying pop-ups that you use often.

Install the extension custom JavaScript for websites. The following only applies if you use Google Chrome. Installing the Extension to Inject the Code We'll go through to the process step by step in this small guide. Many times, we use those websites daily for all kinds of things, and seeing those pop-ups over and over gets old!ĭevelopers can get around these by going to the console and finding selectors to manipulate the website's document object model (DOM) by adding or modifying CSS or JavaScript.īut now, thanks to Google Chrome and its extension store, anyone can inject code into any website automatically. As developers and users of the internet, we often come across websites that display many pop-ups, from subscription requests to paywalls, advertisements to notifications, and so on.

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