JQuery Hello World Example

How to Include jQuery and JavaScript Files in HTML: Tips and Best Practices

Learn how to include jQuery and JavaScript files in an HTML document efficiently and effectively with tips and best practices. Download jQuery, create a JavaScript file, and add script tags to link the files. Avoid common issues and simplify programming with jQuery.

  • Downloading jQuery
  • Creating a JavaScript file
  • 2: How to add jQuery to your website
  • Adding jQuery script to an HTML file
  • Including JavaScript in an HTML document
  • Other ways to include jQuery in a webpage
  • Other code samples for including jQuery and JavaScript files in HTML
  • Conclusion
  • Is it possible to include JavaScript and jQuery in HTML?
  • How to include jQuery in JavaScript file?
  • How to add jQuery plugin in HTML?
  • How to include JavaScript in HTML?
Читайте также:  Python добавить перевод строки

As a web developer, you might have come across the need to include jQuery and JavaScript files in an HTML document. Including these files is a common practice in web development and is essential for creating dynamic and interactive web pages. However, there are several ways to include these files, each with its own advantages and disadvantages. In this guide, we will provide you with a comprehensive overview of how to include jQuery and JavaScript files in an HTML document, along with tips and best practices to follow.

Downloading jQuery

jQuery is a popular JavaScript library that simplifies the process of writing JavaScript code. To include jQuery in your HTML document, you need to download it from the official website or include it from a Content Delivery Network (CDN) like Google. When downloading jQuery, you will have two versions to choose from: compressed and uncompressed. The compressed version is smaller in size and loads faster, while the uncompressed version is larger in size but easier to read and debug.

It’s crucial to use the latest version of jQuery as it includes bug fixes and new features. Best practice is to include jQuery from a CDN for faster loading times. A CDN allows you to use a copy of jQuery that is hosted on a server closer to your user, which reduces the time it takes to download the file.

Creating a JavaScript file

To include jQuery code in an HTML document, you need to create a new JavaScript file and write the code in it. Good coding practice is to separate JavaScript and jQuery code from HTML and include them as external files. This makes it easier to maintain and debug code, especially for larger projects.

Читайте также:  Forum krasmama ru viewtopic php

The script tag is used to link a JavaScript or jQuery file to an HTML document. To include a JavaScript file, you need to add the script tag with the source attribute pointing to the JavaScript file. A jQuery plugin can be included in an HTML document by adding the plugin file after the jQuery source file.

2: How to add jQuery to your website

How to add jQuery to your website | Learn jQuery | jQuery tutorial. Today you will learn how Duration: 4:38

Adding jQuery script to an HTML file

To add jQuery script to an HTML file, you need to download the jQuery file from the official website and move it into the HTML file. To link jQuery in an HTML page, you need to add the script tag with the source attribute pointing to the jQuery file. It’s essential to ensure that the file path is correct, or else the jQuery script will not work.

Common issues when including jQuery in an HTML document include conflicting versions of jQuery or other JavaScript libraries and missing or incorrect file paths. To avoid these issues, it’s best to use a CDN to include jQuery.

Including JavaScript in an HTML document

JavaScript can be included in an HTML document by adding it as an external file or within the script tags. The load() method in jQuery can be used to load an external HTML file into an existing HTML document. However, including JavaScript and jQuery code in an HTML document can make it harder to maintain and debug code.

To avoid cluttering the HTML document, it’s best to include JavaScript and jQuery code in external files. This makes it easier to maintain and debug code, especially for larger projects.

Other ways to include jQuery in a webpage

Other ways to include jquery in a webpage include creating a script element in JavaScript with the src attribute pointing to the jQuery file, or using the jQuery load() method to add an external HTML file into an existing HTML document. jQuery simplifies JavaScript programming by providing a set of pre-written functions and methods. The jQuery API documentation provides a wealth of information on how to use jQuery.

Other code samples for including jQuery and JavaScript files in HTML

In Html , for example, html include jquery code example

In Html case in point, jQuery script tag to include into HTML code example

In Javascript case in point, jquery external script code example

In Html as proof, add jquery script in html code example

In Javascript case in point, js jquery include external script code sample

// jQuery $.getScript('/path/to/imported/script.js', function() < // script is now loaded and executed. // put your dependent JS here. >); 

Conclusion

In conclusion, including jQuery and JavaScript files in an HTML document is crucial for web development. There are several ways to include these files, and it’s essential to choose the method that best suits your needs. By following the tips and best practices outlined in this guide, developers can ensure that their jQuery and JavaScript code is included in an HTML document efficiently and effectively.

Remember to always use the latest version of jQuery, include JavaScript and jQuery code in external files, and use a CDN to include jQuery. By doing so, you can create dynamic and interactive web pages that provide an excellent user experience.

Источник

jQuery is a JavaScript framework that runs very fast with a very small size of JavaScript library code. It can easily implement a lot of JavaScript animation effects by operating DOM objects, processing events, and handling Ajax interactions. jQuery can simplify your JavaScript source code to improve your development speed and JavaScript code execution performance. In this article, I will tell you how to add jQuery links in both Html files and javascript files, and how to use jQuery to implement some basic animations with examples.

  1. The first thing you need to do is to download the jQuery library js file and add it into your Html file.
  2. Open a web browser and go to the jQuery library js file download page http://jquery.com/download/. Find the jQuery library js file download link, right-click it, in the popup menu list click Save Link As menu.
  3. The above action will save the jQuery library js file in a local folder, you can save it to any folder( for example your project lib folder).
  4. Next, you need to add the jQuery link in your Html page file like below source code. Below source code should be added in the head section of the target Html file.
  1. If you add the jQuery link in the Html source code, you must add the below code in every Html file head section. The disadvantage of this method is that if you want to use a new jQuery version you must update all Html files one by one manually, this is not a good method.

If you can not watch the above video, you can see it on the youtube URL https://youtu.be/OvyqoKL97Y0

2.1 Use document.writeln() Function To Add jQuery Link In JavaScript File.

  1. Add below js code in the include-jquery.js file, and then import the include-jquery.js file in test.html.
  2. include-jquery.js
// invoke javascript document object's writeln function to write 'import jquery lib js file string' in html page source code. document.writeln('');
/* Use $ to use jQuery object when the document load ready, then execute the anonymous funcion() */ $(document).ready(function() < // Register click event to all html a tag, the callback function will be triggered when user click a link in the html page. $('a').click(function(event) < // Prevent the link default behaviour, then click it will not open a target url. event.preventDefault(); // Popup an alert dialog. alert('The link will fade out.') // Fade out the link in the html page. $(this).hide("slow"); >); >);

2.2 Add jQuery By Create Script Element In Another JavaScript File.

// When the window load process complete then invoke load jquery lib js file function. window.load = load_jquery_lib_js_file(); function load_jquery_lib_js_file() < // Create a html script element. var script = document.createElement('script'); // Set the html script element's type to 'text/javascript'. script.type = 'text/javascript'; // Set the html script element's src attribute value to google online jquery lib js file. script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js'; // When the jquery script load complete then invoke the handler function for different browsers. script.onreadystatechange = handler; script.onload = handler; // Append the html script element to the end of html page head section. document.getElementsByTagName('head')[0].appendChild(script); >// This function will be executed after jquery lib file has been loaded successfully. function handler()< // Write an message in browser console. console.log('jquery added :)'); // Create a html script element. var script = document.createElement('script'); // Set the html script element's type to 'text/javascript'. script.type = 'text/javascript'; // Set the html script element's src attribute value to the js file which will use jQuery object( it is use-jquery-when-jquery-is-loaded.js in this example ). script.src = './use-jquery-when-jquery-is-loaded.js'; // Append the html script element to the end of html page head section. document.getElementsByTagName('head')[0].appendChild(script); >
/* Use $ to use jQuery object when the document load ready, then execute the anonymous funcion() */ $(document).ready(function() < // Register click event to all html a tag, the callback function will be triggered when user click a link in the html page. $('a').click(function(event) < // Prevent the link default behaviour, then click it will not open a target url. event.preventDefault(); // Popup an alert dialog. alert('The link will fade out.') // Fade out the link in the html page. $(this).hide("slow"); >); >);

3. jQuery Example.

  1. This example contains two html files, hellow-world-alert.html and hello-world-add-number.html.

3.1 jQuery Hello World Alert Example.

  1. In the first example, it will display an alert dialog when the page is loaded.
  2. There is also a button with text “Welcome to JQuery world” in the page, when the button is clicked, it will show two alert dialog, the first alert dialog’s text is ‘You click the button’, the second alert dialog’s text is the button original text, then it will set button text to ‘Wish you like JQuery 🙂‘ and change the button’s text and background color.
  3. hello-world-alert.html
         

3.2 jQuery Hello World Add Number Example.

If you can not watch the above video, you can see it on the youtube URL https://youtu.be/u-x9_IQssaU

  1. This example uses jQuery to set the Html p tag css style. It also bind the mouse move event of the div tag, when your mouse moves in the div tag, the number will increase.
  2. hello-world-add-number.html
     -->    

Hello World From JQuery!

4.1 Question.

  1. I get some jQuery code from the internet, and it meets my requirements, so I want to add those jQuery codes to my Html page. I tried some methods, but failed, can anyone give me some help? Thanks a lot.

4.2 Answer1.

  1. You can create a new javascript file such as common-function.js and then paste your jQuery code into it.
  2. You can save this file in your js project home-directory/js folder. Then you can follow this article to add both the jQuery library js file and the common-function.js file into your Html page ( refer to sections 1, 2 at the beginning of this article ).
  3. And then you can use the jQuery code that you get from the internet. But you also need to make sure the web element id or name in the jQuery code matches the web element in your Html web page.

5. How To Use jQuery To Include Html File Content.

5.1 Question.

  1. My Html page (index.html) contains several other Html pages using the tag like below.

5.2 Answer1.

  1. You can use jQuery’s load() method to load the Html page content (menu.html, detail.html) into the DOM tree of the index.html page.
  2. Then the jQuery object that is created in the index.html page can access and manipulate the content of the menu.html, detail.html.
  3. Below is the example source code.

Источник

Оцените статью