How to add custom JavaScript to Magento 2?

How to add custom JavaScript to Magento 2?

I have experience with Magento 1, and there adding a custom javascript file was very straightforward and logical. But when it comes to Magento 2, I can’t figure out how to add a new js file, where I would put little code snippets that affect different places around the page.

Which is the path to the JS file in Magento?

“js/main” is the path to our custom main.js. The “.js” extension is not required. Our requirejs-config.js will be merged with other requirejs-config.js defined in Magento. RequireJS will load our main.js file, on each page, resolving dependencies and loading files in an async way.

How to add dotdotdot library in magento2?

This is how I add dotdotdot library in my magento2 custom theme. 1. Download and add Js Library in your theme following the path: 2. Create a theme’s requirejs file as follow and let the requirejs know newly added library. 3. Use the added library in your theme’s main js file as follow:

How to add JS file in frontend for all pages?

I’d suggest simple way that requires no coding and no editing – go to Admin->Content->Configuration-> Select Website and Edit -> HTML Head and include or tag here, you can insert CSS also here. Thanks for contributing an answer to Magento Stack Exchange!

How to create custom event and observer in Magento 2?

First of all, to create a custom event in Magento 2, you will need to create a file called events.xml at app/code/MD/Helloworld/etc/frontend directory. Now, copy the below code into the file. name: The name attribute indicates the observer’s name. It must be unique per event definition.

How to extend a default jQuery widget in Magento?

To extend a default Magento jQuery widget, create .js with contents similar to the following: Where the following notation is used: . – the name of your custom widget. According to the jQuery widgets naming convention, this value must contain a namespace and name.

Where to find jQuery UI components in Magento?

Additional dependencies demand more web requests, which can slow rendering. All jQuery UI components for frontend and base areas are located in lib/web/jquery/ui-modules dir. They can be used in JS widgets by jquery-ui-modules path mapping like jquery-ui-modules/widget and jquery-ui-modules/slider .

What should be the name of the Magento widget?

According to the jQuery widgets naming convention, this value must contain a namespace and name. mage. – the name of the Magento widget that you extend. When using custom JS, try to keep dependencies to a minimum. Additional dependencies demand more web requests, which can slow rendering.

Is it recommended to use imperative approach in Magento 2?

It is also worth to mention here the so-called imperative approach in connecting JS modules. You can often find it in the Magento 2 code. However, it is recommended in the Magento 2 official documentation not to use it. Here is what the connection looks like:

How to inject JavaScript in data-Magento-init?

If you need to determine the loading order of JS files, you can use the shim option. Now let’s consider injecting dynamic content and executing JavaScript in data-mage-init and x-magento-init. In order to do it, you can just insert the content in DOM and after that trigger the event ‘ contentUpdated ’.

How are the JS components organized in Magento?

This topic describes general concepts of how JavaScript (JS) components are organized in Magento. To address the problem of slow page loads, we exclude JavaScript from the page headers and we added the ability to use the RequireJS library.

How does RequireJS improve page load time in Magento?

RequireJS improves the perceived page load time because it allows JavaScript to load in the background; in particular, it enables asynchronous JavaScript loading. In Magento, you can find Javascript components on the following levels:

How to customize phtml templates in Magento 2?

In default Magento, ‘Add to Wishlist’ is the first element and ‘Add to Compare’ the second. We propose to invert the position of these 2 buttons by making a Product Page .phtml adjustment. Copy .phtml file TO: app/design/frontend/Pearl/weltpixel_custom/WeltPixel_ProductPage/templates/product/view/addto.phtml

How to add to wishlist and add to compare in Magento?

Let’s suppose we need to invert the default position for Add to Wishlist and Add to Compare from Product Page. In default Magento, ‘Add to Wishlist’ is the first element and ‘Add to Compare’ the second. We propose to invert the position of these 2 buttons by making a Product Page .phtml adjustment.

How to include custom JS file in phtml file?

You’ll call js using the below code in .phtml file if your condition is fulfilled. Add the below code in your .phtml file. Also, create js file name with ko_template.js at app/code/Vendor/Modulename/view/frontend/web/js/ko_template.js And write code as per your need. See the below code for your reference.

How to add JavaScript to the head of a page?

You can do this three ways: by connecting scripts to the head of a page, through a special engine framework, or with the help of RequireJS (the most preferred option). Let’s consider the first way – the connection of scripts to the head of a page.

Where do I find the modal popup in Magento?

They will be located in vendor/vendor-name/module-name/view/frontend/templates/ or vendor/vendor-name/theme-name/module-name/templates/ where “ vendor-name “, “ theme-name ” and “ module-name ” needs to be replaced with your name of vendor, theme and module name. If you are not creating a new module, you can use Magento_Theme module for this case.

How to exclude a JavaScript file in Magento?

The node in the etc/view.xml file for a theme specifies the files to exclude from the Magento JavaScript bundling process. JavaScript files excluded from bundling are loaded asynchronously by RequireJS as needed. As such, you should exclude the JavaScript files you use for testing or development so that they are not loaded on every page.

How does bundling of JavaScript work in Magento?

Bundling accomplishes this by merging multiple JavaScript files together into one file to reduce the number of page requests. JavaScript bundling does not work unless Magento is in production mode. Once in production mode, JavaScript bundling can only be enabled using the CLI. Follow these steps to setup JavaScript bundling from the CLI.

What to do when Magento is in production mode?

Modifying the settings above when Magento is in production mode will require static view files deployment: Finally, clear the cache: For example, when Sign Static Files is disabled (which is the default: config:set dev/static/sign 0 ), the URL to a static file might look like this: /static/frontend/Magento/luma/en_US/mage/dataPost.js.

What are the new features of Magento 2?

Magento 2 brings some new features in javascript. One of them is “ requireJS ” (javascript file loader) and second is “ jQuery “, a very popular js library. One of the biggest benefits is using requireJS which means that Magento 2 is ready for the upcoming HTTP2 protocol.

How to create plugin ( interceptor ) in Magento 2?

Following steps to create plugin in Magento 2: 1 Create the etc/di.xml file in your module folder and add the following code there:

What are the different types of Magento 2 plugins?

As mentioned, there are three types of Magento 2 plugins: before, after, and around. 1. Before plugin Before method is used to change arguments of a method or add some behaviors before method is called.

How are before around and after plugins executed in Magento?

You must be careful to match the default parameters and type hints of the original signature of the method. A plugin has execution order as before method, around method, origin method, and after method. If plugins apply to the same method, Magento executes before method from lowest to highest sortOrder.