Add below line to declare a variable: declare var name: any; Use below line to call the function: new name (); At this point it is ready for use. src/app/app.component.html. One way is to include the code internally, known as the inline method. External JavaScript file The src attribute of script tag is used to add or include external JavaScript file into any number of html files. <main src="external.html" id="containerMain"></main> 4. How to add JavaScript file in Angular project - Websparrow Definition and Usage. 2. <header src="external.html"></header> 3. The included script is inserted into the DOM and not using document.write. How To Include JavaScript Files In SharePoint Framework Solutions? In this tutorial you have learn how to add external js file and custom JavaScript code in specific component in your angular application with help of example of add jquery and bootstrap library and custom JavaScript file. Syntax <script type="text/javascript" src="external.js"></script> First create a JavaScript file and then save the file with .js extension. And inside the 'src' attribute of the script tag, we can include the URL of the external JavaScript library. How to import & export external scripts in Javascript - Codez Up How to use jQuery.getScript() method to load external js files? Including Javascript in XHTML: external, DOM created, CDATA & comments It increases the code re usability. CSS-in-JS is a fairly broad topic. javascript include external js Code Example - Grepper It provides code re usability because single JavaScript file can be used in several html pages. Here is the sample for using external file in Lightning Component:-<ltng:require For example: function loadScript (url, callback) { // Adding the script tag to the head as suggested before var head = document.head; var script = document.createElement ('script'); script.type = 'text/javascript'; script.src = url; // Then bind the event to the . <script src="./dist/es5/alt-iframe.min.js"></script> 2. When you include HTML snippets in a web page, you must secure that other functions that depends on the included HTML do not execute before the HTML is properly included. Using External JavaScript Libraries | Lightning Aura Components ... In HTML documents and web pages, there are two ways to include JavaScript code. var . That covers the quick basics, but there are more things to take note of. Read on for more examples! Include the alt-iframe library on the page. 4 Ways to Add External JavaScript Files in React - Medium