Hide or show elements in HTML using display property. The code can grow into a large decentralized mammoth with potential for conflicts, and a unified approach to doing things. JavaScript lets your web page communicate with the server, retrieve information from it and then alter your webpage without the need to refresh it. To do this, it looks something like this: When you put your JavaScript code inside Example: Read More How to append HTML code to a div using JavaScript ? We can write an inline IF statement in javascript using the methods described below. When you write inline JavaScript, what you’re doing is similar to what the script src tag is doing, except the code is right inside the HTML file, rather than having to be called externally. Method 2: In this method, we will use ternary operator to write inline if statement. How to Display Validation Message for Radio Buttons with Inline Images using Bootstrap 4 ? When you use inline JavaScript in a way that’s not endorsed by the architectural framework or library, you increase the chances of it breaking when things are required to change. close, link Proof of Inline Event Handlers in the Real World. Another common way that developers include inline JavaScript is the function, wp_localize_script(). Inline JavaScript is not evil — but there’s a time and place for everything. To facilitate it, we need to use th:inline="javascript" as an attribute in Inline scripts are often seen in spaces such as Google Analytics tracking codes, site verifications and ownerships for webmaster tools, and initializing and setting parameters of external scripts. Modern code has moved away from manual coding and into optimized structures that provide a framework for effective code creation processes. What happens here is that you are essentially putting JavaScript and DOM elements in one file, for it to be rendered by React. wha… Just because you can do it doesn’t mean that you should. How to optimize the switch statement in JavaScript ? Inline script can lead to poor separation of concerns (as described by many of the other answers here). There are better ways to import, implement, and use JavaScript. When you’ve got a single page application, your root index.html never had refreshes, unless you’ve got a special setup for it to happen with some enforced persistence for the app’s general data. You have an HTML page — with the base structure looking something like this: When you want to add an external JavaScript sheet, you use the