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HOW TO ADD A JAVASCRIPT LIBRARY TO YOUR WORDPRESS SITE?

The most effective method to ADD A JAVASCRIPT LIBRARY TO YOUR WORDPRESS SITE 
1. Discover THE JAVASCRIPT LIBRARY YOU NEED 
The best spot to discover open-source JavaScript libraries is GitHub. State, you need to add a picture lightbox to your site that enables clients to zoom pictures. GitHub has a very propelled pursuit usefulness. Simply type the inquiry "JavaScript lightbox" into the pursuit box and locate the one that best suits your requirements. 
In this article, we will utilize the Intense Images JavaScript library for instance. Yet, you can pursue similar strides to include some other outsider JavaScript (or jQuery) library to your WordPress site. 

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Extreme Images on GitHub Pages 
Note that JavaScript libraries are once in a while called JavaScript modules. These are unique in relation to WordPress modules. JavaScript modules (libraries) keep running toward the front, while WordPress modules keep running toward the back. 
You can introduce WordPress modules from the Plugins menu inside your WordPress administrator region. Be that as it may, JavaScript (or jQuery) modules should be transferred to your server into your topic's envelope (for the most part/wp-content/subjects/your-topic/). 

2. Make A CHILD THEME 
As Intense Images is a JavaScript library that will keep running toward the front, you have to add it to your subject's envelope. Along these lines, the outer library will be bound to the subject. In the event that you actuate another topic and still need to utilize the usefulness, you should add the library to the new topic too. 
In any case, it's not the best plan to add customizations straightforwardly to a WordPress topic, as when you refresh the subject, you lose your customizations. The arrangement is to make a kid subject and add the outer JavaScript library to it (rather than the parent topic). We have an entire article about how to make a WordPress youngster subject. Here, we'll simply specify the most imperative advances. 
To start with, interface with your server and make another organizer inside your topics envelope (in the event that you haven't adjusted the way, it's/wp-content/subjects) for the youngster topic. You can name it whatever you like yet it's a decent practice to by one way or another demonstrate its connection to the parent topic. In the model, we'll make an organizer called twentyseventeen-tyke. It will be the youngster topic of the Twenty Seventeen subject. 
Inside the new envelope, make two documents: style.css and functions.php. Open the style.css document in your code manager and include the accompanying code: 
/* 
Topic Name: Twenty Seventeen Child 
Topic URI: https://wordpress.org/subjects/twentyseventeen/ 
Creator: the WordPress Theme 
Creator URI: https://wordpress.org/ 
Depiction: Twenty Seventeen Child Theme 
Format: twentyseventeen 
Rendition: 1.7 
Permit: GNU General Public License v2 or later 
Permit URI: http://www.gnu.org/licenses/gpl-2.0.html 
Content Domain: twentyseventeen-tyke 
*/ 
This CSS code ties the tyke topic to the parent topic. Note that the parent subject (Twenty Seventeen in the precedent) likewise must be available inside the topics envelope, as this is the place WordPress pulls the kid topic's default styles from. 
At that point, add the accompanying PHP code to the functions.php record: 
<?php 
/* Adds tyke topic */ 
add_action( 'wp_enqueue_scripts', 'enqueue_parent_styles' ); 
work enqueue_parent_styles() { 
wp_enqueue_style( 'parent-style', get_template_directory_uri().'/style.css' ); 
This PHP code registers and enqueues the tyke topic with the goal that the WordPress backend can get to it. Presently, in the event that you click the Appearance > Themes menu in your WordPress administrator, you will see that the kid topic has showed up among your subjects: 
WordPress Child Theme Activated 

3. DOWNLOAD THE JAVASCRIPT LIBRARY 
Make another organizer inside the youngster subject's envelope and call it contents. This is the place the custom contents having a place with the tyke subject will live. Right now, this is the manner by which the document structure of our model subjects organizer resembles: 
subjects/ 
- twentyseventeen/ 
- twentyseventeen-youngster/ 
- contents/ 
- functions.php 
- style.css 
Presently, download the outsider JavaScript library (Intense Images in our model) from GitHub into the contents/envelope. You can either download the ZIP document from GitHub or clone the storehouse utilizing the accompanying direction: 
git clone https://github.com/tholman/extraordinary images.git 
When you complete the download, your document structure should resemble this: 
subjects/ 
- twentyseventeen/ 
- twentyseventeen-kid/ 
- contents/ 
- extraordinary pictures/ 
- functions.php 
- style.css 

4. CALL THE SCRIPT 
In this way, the outer JavaScript library is as of now transferred to your server. Notwithstanding, when your site stacks in the client's program, it additionally needs to call the outsider content. You have to add this code to a different JavaScript record. 
Inside the contents/envelope make another content document and call it loader.js. You can utilize an alternate name with the .js augmentation too. Here's the manner by which your document structure should be adjusted: 
topics/ 
- twentyseventeen/ 
- twentyseventeen-youngster/ 
- contents/ 
- serious pictures/ 
- loader.js 
- functions.php 
- style.css 
Open the loader.js record in your code editorial manager and include the accompanying code: 
window.onload = work() { 
/Intensify all pictures on the page. 
var component = document.querySelectorAll( 'img' ); 
Extraordinary( component ); 
This code stacks the Intense Images JavaScript module on page load. Be that as it may, how would you realize what code to use to call the content? All things considered, the library's GitHub docs (nearly) dependably incorporate the guest content you have to utilize. 
For example, Intense Images furnishes clients with three choices. In the code scrap above, we have utilized the first that adds the library to all pictures, yet the other two alternatives work similarly also. 

5. ENQUEUE THE SCRIPTS IN FUNCTIONS.PHP 
In the past advances, the JavaScript module (serious pictures/) and the guest content (loader.js) has been added to the front-end of your youngster subject. Be that as it may, you additionally need to enroll and enqueue the contents on the backend (in Step 2, we just enlisted and enqueued the kid topic however not the contents). 
You can do that by adding the accompanying code to your functions.php document you made in Step 2. Open it again in your code supervisor and add the accompanying code as far as possible of the record: 
/* Adds contents */ 
add_action( 'wp_enqueue_scripts', 'add_scripts' ); 
work add_scripts() { 
wp_enqueue_script('intense-pictures', get_theme_file_uri( '/contents/extreme pictures/intense.min.js')); 
wp_enqueue_script('loader', get_theme_file_uri( '/contents/loader.js'), array('intense-images')); 
This PHP code includes both the Intense Images library and loader.js to the tyke subject. It makes utilization of the wp_enqueue_script() work that is a piece of the WordPress API and registers and enqueues outer contents. 
We don't need to include the entire Intense Images library, simply the intense.min.js minified content document. On account of loader.js, we additionally need to include exceptional pictures (inside an exhibit) as a contention, as loader.js is a reliance of the Intense Images library. (Note that on the off chance that you include a jQuery module you likewise need to include jQuery as a reliance.) 
Additionally focus on the best possible record way you add to the get_theme_file_uri() work. This capacity is a piece of the WordPress API also. It recovers the URL of your subject's envelope (in the model twentyseventeen-kid). Here, we use it to powerfully add the document ways having a place with the outer contents. 

6. TEST THE JAVASCRIPT LIBRARY 
The outsider JavaScript library is going at this point. It's an ideal opportunity to test in the event that it appropriately works. It relies upon the library how you should test it. In our precedent, Intense Images essentially includes itself to all pictures the site, as this is the manner by which we set it up in loader.js. 
In this way, to test it, it's sufficient to reload the WordPress site, click on any picture and look at if it's increased or not. For example, here's a picture on our test site: 
Testing JavaScript Library Before Click 
On snap, the picture gets full-screen, and on a second snap, it comes back to its unique size: 
Testing JavaScript Library After Click 
This unmistakably demonstrates the outsider JavaScript module has been legitimately set up and added to the WordPress topic.
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