How to include custom JavaScript in Magento 2?

How to include custom JavaScript in Magento 2?

JavaScript is considered the best tool for including such elements. Magento 2 allows to connect custom scripts for the entire site, certain pages, or even for specified blocks and parts of a page. What options exist to include custom JavaScript on a page? What are the advantages and disadvantages of inline JavaScript?

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.

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.

How to add JavaScript to the head of a page?

The easiest way is to just place your js code into one of yours .phtml templates, but more likely you’ll want to place it into html head of your page code, especially if the same script will be used on different pages. You can achieve it by adding your custom blocks to head layout block or by overriding head.phtml template.

How to create new CMS block in Magento 2?

1. Navigate to Admin Panel > Content > Configuration. 2. Choose the store view you want the head tag to be changed on or select Global in order to change it on every store view. ✔ How to Create New CMS Block in Magento 2?

Which is an example URL generated by Magento?

For example url paths generated by Magento or JSON encoded settings or objects for your javascript code. For this mission we have some approaches too.

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.

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:

Where can I ask a question about Magento?

Magento Stack Exchange is a question and answer site for users of the Magento e-Commerce platform. It only takes a minute to sign up. Sign up to join this community Anybody can ask a question

How to run a direct script in Magento 2?

You can run the direct script from Magento 2 root using below code. Create a new file in Magento 2 root directory and add this code and after this add your script in the file. Here is what I did to bring initialize Magento into my custom script outside of the magento directory.

Why is JavaScript excluded from page headers 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. RequireJS improves the perceived page load time because it allows JavaScript to load in the background; in particular, it enables asynchronous JavaScript loading.

When to run installschema.php in Magento 2?

As the names suggest, the InstallSchema.php and InstallData.php scripts run when the module is first installed in Magento 2. These scripts are used to modify the data and structure of the database respectively. It means, if InstallSchema.php and InstallData.php are created after the installation of the module, they will never be executed.

How to update cart using Ajax in Magento 2?

1. Create MageMonkey/AutoUpdateCartAjax directories in app/code. 2. Create registration.php file at app/code/MageMonkey/AutoUpdateCartAjax and add following code: 3. Create module.xml file at app/code/MageMonkey/AutoUpdateCartAjax/etc/ and add following code:

Where do I find automatic testing in Magento?

JavaScript automatic testing is described in a separate JavaScript unit testing topic. Any separate .js file decorated as AMD module. JS component located in the Magento_Ui module, in the app/code/Magento/Ui/view directory, or JS component that extends files from this module. A JS component/widget provided by the jQuery UI library used in Magento.

What are content security policies in Magento 2?

Content Security Policies (CSP) are a powerful tool to mitigate against Cross Site Scripting (XSS) and related attacks, including card skimmers, session hijacking, clickjacking, and more.

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!

Where can I download JavaScript for html2canvas?

In your index.html, add the following javascript files: You can download the last two from: https://github.com/downloads/niklasvh/html2canvas/v0.34.zip In your Javascript, you can then code (replace #myObjectId with a valid JQuery selector):

Why is my JavaScript not working with html2canvas?

If it isn’t working for you, it may be that you’re specifying an incorrect parent DOM element — you can try $ (‘body’) instead of $ (‘#myObj’) and see if anything comes up. In your index.html, add the following javascript files: You can download the last two from: https://github.com/downloads/niklasvh/html2canvas/v0.34.zip

How to make HTML Canvas work in JavaScript?

In your Javascript, you can then code (replace #myObjectId with a valid JQuery selector): Not the answer you’re looking for? Browse other questions tagged javascript html canvas screenshot html2canvas or ask your own question.

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.

Why do I need Min CSS in Magento?

In Magento we simply add min.css to head.phtml: Once you get everything setup it’s important to test your site in different browsers to make sure it looks OK. Having unused CSS can really slow down your applications and just makes your web page longer, which also makes it take longer to load.

How to extract critical path CSS in Magento 2?

Download the html code of homepage, cms page etc and store it inside src/html folder: Create src/css folder and download main css file from which we extract critical-path css

When to use declarative notation in Magento 2?

Use declarative notation if your JavaScript component requires initialization. In Magento 2, you have two options for specifying declarative notation: This is used to target a specific HTML element.

How to load custom JS file on all pages?

To load a custom main.js file on all pages (in the RequireJS-way) this is a good way: In short: we declare dependencies at the start, e.g. “jquery”. We define as function’s parameter the variable name for using the dependency within the function, e.g. “jquery” –> $.