Introduction to loader.js

Loader.js is a powerful JavaScript library that simplifies the process of loading and managing scripting assets in your web applications. In this guide, we will explore numerous useful APIs provided by loader.js along with practical code snippets to help you get started.

Basic Usage

The load API is used to load a single script file.

  loader.load('/path/to/script.js', function() {
      console.log('Script loaded successfully!');
  });

Loading Multiple Scripts

You can load multiple scripts sequentially using the loadSequential API.

  loader.loadSequential(['/path/to/script1.js', '/path/to/script2.js'], function() {
      console.log('All scripts loaded in sequence!');
  });

Loading Scripts in Parallel

The loadParallel API allows multiple scripts to be loaded in parallel.

  loader.loadParallel(['/path/to/script1.js', '/path/to/script2.js'], function() {
      console.log('All scripts loaded in parallel!');
  });

Caching Scripts

Enable script caching using the enableCache API for faster subsequent loads.

  loader.enableCache(true);
  loader.load('/path/to/script.js', function() {
      console.log('Cached script loaded successfully!');
  });

Handling Errors

Use the onError API to handle script loading errors gracefully.

  loader.onError(function(error) {
      console.error('Failed to load script:', error);
  });
  loader.load('/path/to/script.js');

Advanced Example: App Initialization

Below is an example of how to initialize a small app using loader.js APIs.

  loader.enableCache(true);
  loader.loadSequential(['/path/to/library.js', '/path/to/app.js'], function() {
      console.log('All libraries loaded, initializing app.');
      initApp();
  });

  function initApp() {
      console.log('App initialized successfully.');
      // Initialize app components here
  }

In this example, we load necessary libraries and the application script sequentially, enable caching for performance benefits, and then initialize the application upon successful loading of all scripts.

Loader.js provides an easy and efficient way to manage script loading, making it an essential tool for modern web development.

Conclusion

We covered the basic and advanced uses of loader.js. Utilizing these APIs can significantly streamline and optimize the script loading process in your web applications.

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