Aug 4, 2015 · One of the requirements is to allow the user to upload a csv file containing a list of items to be created. This can be implemented on the front-end by parsing the file in javascript and making create API call to the server for each item.

Mar 16, 2017 · In a discussion around optimizing front-end assets, I recently had occasion to explain how browsers process <script> tags — which seemed useful enough to be reposted here.

Apr 23, 2024 · When it comes to JavaScript loading strategies, it’s all about optimizing how and when your Javascript files are downloaded and executed in the browser. This directly affects your web page’s...

For loading a script file dynamically using JavaScript, the basic steps are: This numbered list turned into code looks like the following three lines: The myScript variable stores a reference to our newly created script element. The setAttribute method allows us to set the src value for the script we'd like to load.

Sep 25, 2024 · Backend development refers to the "behind the scenes" work of a website or application. It includes managing databases, handling client requests, performing business logic, and sending responses back to the frontend.

Mar 24, 2018 · Here’s how a page loads a script without defer or async, put at the end of the body tag, just before it closes: The parsing is done without any pauses, and when it finishes, the script is fetched, and executed. Parsing is done before the script is even downloaded, so the page appears to the user way before the previous example.

If you aren't dynamically loading scripts or marking them as defer or async, then scripts are loaded in the order encountered in the page. It doesn't matter whether it's an external script or an inline script - they are executed in the order they are encountered in the page.

Jul 18, 2021 · This attribute ensures that the script file is loaded without affecting the HTML from being parsed. That is, the browser loads/ fetches the script file simultaneously while the HTML is being parsed. The HTML parse is not paused, and hence loading of script file does not block the DOM from loading.

Dynamic JavaScript file loading refers to the process of adding scripts to the document at runtime. Instead of including all scripts in the HTML file, you can load specific scripts only when they are needed. This technique improves performance, reduces …

For a Progressive Web App I wrote a script to easily load javascript files async on demand. Scripts are only loaded once. So you can call loadScript as often as you want for the same file. It wouldn't be loaded twice. This script requires JQuery to work. For example: