To place JavaScript in external file create an external JavaScript file with the extension .js. After creating, add it to the HTML file in the script tag. The src attribute is used to include that external JavaScript file.If you have more than one external JavaScript file, then add it to the same web page to increase the performance of the page.Let’s say the following new.js is our external JavaScript file −function display() {    alert("Hello World!"); }Now add the external JavaScript file to the HTML web page −                                      

To enhance performance, try to keep JavaScript external. The separate code makes it easier for web browsers to cache. However, use inline scripts only when you’re making single page websites. Still, it's better to use external code i.e. external JavaScript. To place JavaScript in external file create an external JavaScript file with the extension .js. After creating, add it to the HTML file in the script tag. The src attribute is used to include that external JavaScript file. If you have more than one external JavaScript file, then add it to the same web page to increase the performance of ... Read More

Create an external JavaScript file and add the jQuery code in it.ExampleLet’s say the name of the external file is demo.js. To add it in the HTML page, include it like the following −                               Hello     Above we added jQuery using Google CDN and the external file was included after that.Add jQuery code in demo.js, since you wanted to place jQuery code −$(document).ready(function(){    alert(“amit”) });

Anonymous FunctionsAnonymous, as the name suggests, allows creating a function without any names identifier. It can be used as an argument to other functions. This is how JavaScript anonymous functions can be used −var myfunc = function() {    alert(‘This is anonymous'); }Another example can be the following −setTimeout(function() {    alert('Demo'); }, 3000);Inline FunctionsAn inline function is a javascript function, which is assigned to a variable created at runtime. You can difference Inline Functions easily with Anonymous since an inline function is assigned to a variable and can be easily reused.This is how JavaScript inline functions can be used −var ... Read More

What is JavaScript? JavaScript is a client-side scripting language which is used to create a dynamic webpage. It is integrated with the HTML code. JavaScript code is inserted between and tags as shown below. document.getElementById("demoId").innerHTML = "JavaScript Example"; JavaScript is a programming language that adds rich interactivity to your website (for example: games, responses when buttons are pressed or data entered in forms, dynamic styling, animation etc..). In its most common form, JavaScript resides inside HTML documents, and can provide levels of interactivity to web pages that are not achievable ... Read More

Create external JavaScript file with the extension .js. After creating, add it to the HTML file in the script tag. The src attribute is used to include that external JavaScript file.If you have more than one external JavaScript file, then add it in the same web page to increase performance of the page.Let’s say the following new.js is our external JavaScript file −function display() {    alert("Hello World!"); }Now add the external JavaScript file to the HTML web page −                                      

You can place the tags, containing your JavaScript, anywhere within your web page, but it is normally recommended that you should keep it within the tag or tag.It’s good for performance to add JavaScript in element. Here’s an example to add under … −                               Here’s an example to add under … −                                        

With JavaScript, you can put JavaScript anywhere on the page, whether inside or tag. But, it is a good practice to add JavaScript in the footer i.e. just before closing the tag. This is because −It loads script faster.It will not block any DOM content to load.It loads the web page before loading JavaScriptImproves display speedPage loads faster

In HTML, the script tag can be inserted either in head section or in body section, generally the java script code is inserted between script open and close tags. //JavaScript code here We can insert any number of scripts in an HTML document. Scripts can be placed in , or section or in both of an HTML page. Now, let’s see if there is any difference if we insert script in body or head of HTML. It is better to place the java script before closing of the tag rather than ... Read More

To find whether the browser supports JavaScript or not, use the tag. The HTML tag is used to handle the browsers, which do recognize tag but do not support scripting. This tag is used to display an alternate text message.ExampleLive Demo           HTML noscript Tag                                                    Your browser does not support JavaScript!