"Optimize your website by selectively loading only the necessary files with this JavaScript library

We are in the process of developing a JavaScript component for integration into a JSF application, utilizing Dojo framework. Our aim is to streamline our code by incorporating only the necessary parts of the library required to achieve our objectives.

While manual inclusion of files and folders is an option, we anticipate future requirements that may involve additional Dojo functionalities, prompting the need for a more efficient approach. Admittedly, our expertise with Dojo and JavaScript is limited at this point.

Essentially, we are seeking a method to automate the selection of relevant resources. One idea is to compile a list of dependencies and devise a script to accurately filter the files accordingly.

Is this feasible? Has anyone else embarked on a similar endeavor before? Appreciate any insights or advice. Thank you.

javascriptweb-applicationsdojo

Answer №1

It's possible that I may not fully understand your request, but as far as I know, Dojo provides the functionality you are looking for right out of the box. With the latest versions of Dojo following the Asynchronous Module Definition (AMD) format, you can utilize the global require function to specify the dependencies for a particular block of code, ensuring that only those specific modules are loaded. An illustration from the Dojo introductory guide on SitePen:

require(["dojo/dom", "dojo/domReady!"], function(dom){
    var greeting = dom.byId("greeting");
    greeting.innerHTML += " from Dojo!";
});

If your goal is to minimize the number of <script/> tags needed for loading, then you should explore the Dojo builder tool. By using the online build tool, you have the ability to select the packages you want included in the dojo.js layer, resulting in a zip file containing both dojo.js and dojo.js.uncompressed.js files. These files encompass the Dojo core along with the modules you have chosen.

Answer №2

Here is a step-by-step guide on how we accomplished this task for future reference:

    * Start by declaring a JSF filter and mapping it to /js/* (assuming all dojo resources are located under the /js folder, adjust as needed for your own folder structure). This setup ensures that any requests for dojo resources will be filtered.
    * Within the filter class, retrieve all requested files using HttpServletRequest.getRequestURI() and write them line by line to a file - now you have all the necessary resources saved.
    * Next, parse this file with a script tocopy the files to another location while maintaining the folder structure intact.
    * Finally, utilize these created files in your WebContent folder or any other desired location, ensuring a streamlined library deployment where only necessary resources are included.

Answer №3

Across the vast expanse of the internet, there are numerous JavaScript libraries vying for your attention, promising to simplify your web development tasks and save you time. These libraries claim to be a one-stop solution for all your needs, boasting about their small file size and ability to make your website practically function on its own. Personally, I am not a fan of these bloated JavaScript libraries, as they often contain unnecessary code. This led me to create a minimalistic library called EJ – Essential JavaScript.

EJ is a collection of essential functions that I frequently use in my projects, helping me write JavaScript code more efficiently and quickly. Instead of constantly rewriting the same code for each new project, EJ allows me to have everything I need in one compact file. This way, I can focus on implementing new features and addressing unique challenges in my web development endeavors.

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