Ways to incorporate a dependency from an external script

Question

Ways to incorporate a dependency from an external script

Utilizing a cloud service known as Parse within a JavaScript closure implemented with require.js:

define([/*some dependencies*/], 
   function(/*some dependencies*/) {

     ...

     // utilizing Parse. For instance:
     var TestObject = Parse.Object.extend("TestObject");

     ...

}

The guide for incorporating Parse in Javascript advises including their script directly in the HTML header:

<script src="//www.parsecdn.com/js/parse-1.4.2.min.js"></script>

I'd prefer to avoid making the HTML page reliant on Parse and refrain from cluttering the HTML with external scripts. Instead, I want to require parse-1.4.2.min.js directly from the script itself. What is the correct approach to achieving this? How can I define this dependency and ensure it functions properly?

javascript dependency-injection requirejs

Answer 1

Answer №1

Just like jQuery, when Parse is loaded it becomes part of the global scope. If no other scripts require Parse, it can be included as a dependency in a module or require call.

require([
    'https://www.parsecdn.com/js/parse-1.4.2.min.js',
], function () {
    console.log(Parse);
}

If you are using non-AMD scripts that rely on Parse (or any other library), a config/shim is necessary. This configuration informs requireJS about the order in which to load the scripts based on their dependencies.

For example, with a jQuery plugin, you wouldn't want it to execute before jQuery itself.

A config/paths setup also helps in organizing your project by defining script locations in one place and referencing them from there.

Visit the requireJS docs for more information.

The following config/require successfully loads Parse and a fictional plugin:

require.config({

  // define paths to be loaded, centralizing locations
  paths: {
    parse: 'https://www.parsecdn.com/js/parse-1.4.2.min',
    plugin: 'example-non-amd-parse-plugin.js'
  },

  // define non-amd libraries and their dependencies
  shim: {
    parse: {
      exports: 'Parse'
    },
    plugin: {
      exports: 'plugin',
      deps: ['parse']
    }
  }
});

require(['parse'], function(Parse){
  console.log(Parse);
});

// note Parse is not required here
require(['plugin'], function(plugin){

  // Parse is accessible through the global scope and the dependency on plugin
  console.log(Parse, plugin);
});

Answer 2

Just like jQuery, when Parse is loaded it becomes part of the global scope. If no other scripts require Parse, it can be included as a dependency in a module or require call.

require([
    'https://www.parsecdn.com/js/parse-1.4.2.min.js',
], function () {
    console.log(Parse);
}

If you are using non-AMD scripts that rely on Parse (or any other library), a config/shim is necessary. This configuration informs requireJS about the order in which to load the scripts based on their dependencies.

For example, with a jQuery plugin, you wouldn't want it to execute before jQuery itself.

A config/paths setup also helps in organizing your project by defining script locations in one place and referencing them from there.

Visit the requireJS docs for more information.

The following config/require successfully loads Parse and a fictional plugin:

require.config({

  // define paths to be loaded, centralizing locations
  paths: {
    parse: 'https://www.parsecdn.com/js/parse-1.4.2.min',
    plugin: 'example-non-amd-parse-plugin.js'
  },

  // define non-amd libraries and their dependencies
  shim: {
    parse: {
      exports: 'Parse'
    },
    plugin: {
      exports: 'plugin',
      deps: ['parse']
    }
  }
});

require(['parse'], function(Parse){
  console.log(Parse);
});

// note Parse is not required here
require(['plugin'], function(plugin){

  // Parse is accessible through the global scope and the dependency on plugin
  console.log(Parse, plugin);
});

Answer 3

Answer №2

After carefully troubleshooting, I finally managed to write this code and it appears to be functioning correctly. The initial issue remains a mystery...

define(["https://www.cdnparse.com/js/parse-1.4.2.min.js"], 
   function () {

Answer 4

After carefully troubleshooting, I finally managed to write this code and it appears to be functioning correctly. The initial issue remains a mystery...

define(["https://www.cdnparse.com/js/parse-1.4.2.min.js"], 
   function () {

Ways to incorporate a dependency from an external script

Answer №1

Answer №2

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