load-script

What is load-script?

The load-script npm package is a utility for dynamically loading external JavaScript files into a web page. It provides a simple and efficient way to include scripts on the fly, which can be useful for various purposes such as loading third-party libraries, modularizing code, or conditionally loading scripts based on user interactions or other conditions.

What are load-script's main functionalities?

Basic Script Loading

This feature allows you to load an external JavaScript file by providing its URL. The callback function handles the success or failure of the script loading process.

const loadScript = require('load-script');

loadScript('https://example.com/script.js', function (err, script) {
  if (err) {
    console.error('Script loading failed:', err);
  } else {
    console.log('Script loaded successfully:', script.src);
  }
});

Loading Scripts with Attributes

This feature allows you to load a script with additional attributes such as 'async' and 'defer'. These attributes can control the script's loading behavior and execution timing.

const loadScript = require('load-script');

loadScript('https://example.com/script.js', { async: true, defer: true }, function (err, script) {
  if (err) {
    console.error('Script loading failed:', err);
  } else {
    console.log('Script loaded successfully with attributes:', script.src);
  }
});

Error Handling

This feature demonstrates how to handle errors when a script fails to load. The callback function receives an error object that can be used to log or handle the error appropriately.

const loadScript = require('load-script');

loadScript('https://example.com/nonexistent.js', function (err, script) {
  if (err) {
    console.error('Failed to load script:', err.message);
  } else {
    console.log('Script loaded successfully:', script.src);
  }
});

Other packages similar to load-script

scriptjs

Script.js is a lightweight library for dynamically loading JavaScript. It offers similar functionality to load-script but with a slightly different API. Script.js allows for chaining multiple script loads and provides a more fluent interface.

requirejs

RequireJS is a JavaScript file and module loader. While it is more complex and feature-rich compared to load-script, it provides advanced capabilities for managing dependencies and modularizing code. It is suitable for larger projects that require a robust module loading system.

headjs

Head.js is a script loader that focuses on optimizing the loading of JavaScript and CSS files. It provides features for parallel loading and execution order control, making it a powerful tool for improving page load performance.

README

load-script

Dynamic script loading.

Installation

via component

$ component install eldargab/load-script

via npm

$ npm install load-script

API

var load = require('load-script')
load('foo.js', function (err) {
  if (err) {
    // print useful message
  else {
    // use script
    // note that in IE8 and below loading error wouldn't be reported
  }
})

License

MIT