- JavaScript Where To
- Example
- JavaScript Functions and Events
- Example
- Demo JavaScript in Head
- Example
- Demo JavaScript in Body
- External JavaScript
- External file: myScript.js
- Example
- External JavaScript Advantages
- Example
- External References
- Example
- Example
- Example
- Import external JS links in HTML
- How do I link a JavaScript file to a HTML file?
- 6 Answers 6
- Test in real time
- Linking external JavaScript file to HTML
- 4 Answers 4
JavaScript Where To
In HTML, JavaScript code is inserted between tags.
Example
Old JavaScript examples may use a type attribute: .
The type attribute is not required. JavaScript is the default scripting language in HTML.
JavaScript Functions and Events
A JavaScript function is a block of JavaScript code, that can be executed when «called» for.
For example, a function can be called when an event occurs, like when the user clicks a button.
You will learn much more about functions and events in later chapters.
JavaScript in or
You can place any number of scripts in an HTML document.
Scripts can be placed in the , or in the section of an HTML page, or in both.
JavaScript in
In this example, a JavaScript function is placed in the section of an HTML page.
The function is invoked (called) when a button is clicked:
Example
Demo JavaScript in Head
JavaScript in
In this example, a JavaScript function is placed in the section of an HTML page.
The function is invoked (called) when a button is clicked:
Example
Demo JavaScript in Body
Placing scripts at the bottom of the element improves the display speed, because script interpretation slows down the display.
External JavaScript
Scripts can also be placed in external files:
External file: myScript.js
External scripts are practical when the same code is used in many different web pages.
JavaScript files have the file extension .js.
To use an external script, put the name of the script file in the src (source) attribute of a tag:
Example
You can place an external script reference in or as you like.
The script will behave as if it was located exactly where the tag is located.
External scripts cannot contain tags.
External JavaScript Advantages
Placing scripts in external files has some advantages:
- It separates HTML and code
- It makes HTML and JavaScript easier to read and maintain
- Cached JavaScript files can speed up page loads
To add several script files to one page — use several script tags:
Example
External References
An external script can be referenced in 3 different ways:
- With a full URL (a full web address)
- With a file path (like /js/)
- Without any path
This example uses a full URL to link to myScript.js:
Example
This example uses a file path to link to myScript.js:
Example
This example uses no path to link to myScript.js:
Example
You can read more about file paths in the chapter HTML File Paths.
Import external JS links in HTML
I am trying to make a Responsive Testimonial HTML File. It works on codepen (link is Here ) and is working nicely. When I transferred it on sublimetext, it doesn’t seem to work. I believe it is due to the placement of my codes. As we all know, the format of codepen is different from that of an actual code. Can someone tell me where I went wrong? I am confused on how to import or declare external JS links and the positioning. Thanks in advance Here is what I made (UPDATE, I removed the main.js and saved it separately, and called it out. I believe the format is vendor first then the main.js) HTML
What Clients Say
![Customer Feedback](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%200%200'%3E%3C/svg%3E)
Lisa Redfern
Lorem Ipsum is simply dummy text of the printing and typesetting industry. It is a long established fact that a reader will be distracted by the readable its layout.
5 ![Customer Feedback](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%200%200'%3E%3C/svg%3E)
Cassi
Lorem Ipsum is simply dummy text of the printing and typesetting industry. It is a long established fact that a reader will be distracted by the readable its layout.
4 ![Customer Feedback](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%200%200'%3E%3C/svg%3E)
Md Nahidul
Lorem Ipsum is simply dummy text of the printing and typesetting industry. It is a long established fact that a reader will be distracted by the readable its layout.
5
5
4
jQuery(document).ready(function($) ", " "], responsive: < // breakpoint from 767 up 767:< nav: true, dots: false >> >); feedbackSlider.on("translate.owl.carousel", function()< $(".feedback-slider-item h3").removeClass("animated fadeIn").css("opacity", "0"); $(".feedback-slider-item img, .feedback-slider-thumb img, .customer-rating").removeClass("animated zoomIn").css("opacity", "0"); >); feedbackSlider.on("translated.owl.carousel", function()< $(".feedback-slider-item h3").addClass("animated fadeIn").css("opacity", "1"); $(".feedback-slider-item img, .feedback-slider-thumb img, .customer-rating").addClass("animated zoomIn").css("opacity", "1"); >); feedbackSlider.on('changed.owl.carousel', function(property) '); $('.thumb-next').find('span').next().html(nextRating + ' '); >); $('.thumb-next').on('click', function() < feedbackSlider.trigger('next.owl.carousel', [300]); return false; >); $('.thumb-prev').on('click', function() < feedbackSlider.trigger('prev.owl.carousel', [300]); return false; >); >); //end ready
Below is the OUTPUT that is showing our what I have right now. I believe it has something to do on how I declare the css and js external codes My Current Output
How do I link a JavaScript file to a HTML file?
How do you properly link a JavaScript file to a HTML document? Secondly, how do you use jQuery within a JavaScript file?
@caramba But what if I need the JS to do something more complicated? I’m trying to have it write a file so I call const fs = require(‘fs’); from node.
6 Answers 6
First you need to download JQuery library from http://jquery.com/ then load the jquery library the following way within your html head tags
then you can test whether the jquery is working by coding your jquery code after the jquery loading script
If you want to use your jquery scripts file seperately you must define the external .js file this way after the jquery library loading.
Test in real time
Thank you SO MUCH. This is exactly the answer that I finally figured out! I know that the question was elementary but I thank you for taking the time to show me this! What I was missing was placing the jQuery library before the javascript file!
Why can’t we put the library after the script? I can place the js script after the HTML element I need to interact though
That’s a great detailed explanation. Just would like to add that you should avoid this Legacy JavaScript MIME types
This is how you link a JS file in HTML
— tag is used to define a client-side script, such as a JavaScript.
type — specify the type of the script
src — script file name and path
To include an external Javascript file you use the tag. The src attribute points to the location of your Javascript file within your web project.
JQuery is simply a Javascript file, so if you download a copy of the file you can include it within your page using a script tag. You can also include Jquery from a content distribution network such as the one hosted by Google.
You can add script tags in your HTML document, ideally inside the which points to your javascript files. Order of the script tags are important. Load the jQuery before your script files if you want to use jQuery from your script.
Then in your javascript file you can refer to jQuery either using $ sign or jQuery . Example:
Below you have some VALID html5 example document. The type attribute in script tag is not mandatory in HTML5.
You use jquery by $ charater. Put libraries (like jquery) in tag — but your script put allways at the bottom of document ( tag) — due this you will be sure that all libraries and html document will be loaded when your script execution starts. You can also use src attribute in bottom script tag to include you script file instead of putting direct js code like above.
Im the content
Linking external JavaScript file to HTML
I am new to JavaScript and trying to link my JavaScript code to HTML. Along with the code mentioned below I have also tried below variations in script tag in HTML but none of them worked. Kindly let me know how to link my external file to HTML. Here is my folder structure: Examples of what I have tried —
function loadMovies() < document.getElementById("p1").innerHTML = ' ' >
Small note to G:\path: the path is loaded by the browser so the path needs to be absolute to the browsers view so always protocol://yourserver.com/path/to/file
4 Answers 4
Also, put your function loadMovies() inside script tag
I tried the above code and to run the program in chrome and edge browser but it still shows a blank screen.
It looks like you are trying to adapt code that you copied since your loadMovies() function has nothing to do with movies. It’s okay to borrow code and adapt it to fit your situation, but you should change names to fit functionality. It makes your code easier to read.
If your JavaScript file was in the same directory as your HTML file, you could just use , but it’s not which means that you have to follow the directory tree to the location of the .js file. In your case, that means going up two levels, and then down two levels like this. . I’m also assuming that the JavaScript that you are showing after your closing