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promise-loader's Introduction

A sister of bundle-loader with promise API

Usage

Documentation: Using loaders

This is a ripoff of bundle-loader that uses promises instead of callbacks. It only implements so-called lazy bundle-loader mode—that is, require returns a function that, when invoked, returns a promise that resolves to the module.

require: (string) -> () -> Promise<module>

It's up to you to specify your Promise library of choice as a parameter.

// Assuming you use Bluebird
var load = require("promise?bluebird!./file.js");

// The chunk is not requested until you call the load function
load().then(function(file) {

});

If a promise library is already loaded externally you can specify 'global'.

You can optionally specify a name for your chunk after a comma:

var load = require("promise?bluebird,editor!./editor.js");

This can be useful for single-page apps because you can later extract filenames from Webpack-generated stats and pre-load specific bundles if you know user's going to hit them.

The bundle name may include [filename], which will be replaced with the filename, and [name], which omits the extension. This is useful for when you want to configure loaders in Webpack configuration without specifying precise filenames—for example, by a suffix:

{
  test: /\.i18n\.json$/,
  loader: 'promise?global,[name].i18n'
}

License

MIT (http://www.opensource.org/licenses/mit-license.php)

promise-loader's People

Contributors

alexkuz avatar gaearon avatar kurtharriger avatar sokra avatar

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promise-loader's Issues

How do I set this up with jquery promises?

I want to use this with jquery promises as I see that jquery 3 coming out in the next several months will support Promise/A+ and its just one less dependency for me within an acceptable time frame for me.

I just need a two line loader config example and one line on how to call it.

Any plan to support config globally in webpack.config.js?

According to bundle-loader, I highly recommend to support config them globally in webpack.config.js. If so, the config may looks like this:

{
  loader: 'promise-loader',
  options: {
    lib: 'bluebird',
    name: '[name]'
  }
}

I'd like to submit a PR if you agree with this.

TypeError: not a function

Using webpack 2.2.0-rc.2, I'm getting a lot of these errors:

WARNING in ./~/promise?global,intl.[name]!./~/intl/locale-data/jsonp/uz-Cyrl.js
Module build failed: TypeError: not a function
    at Object.Promise (/Users/romeovs/path/to/project/node_modules/promise/lib/core.js:59:11)
 @ ./~/intl/locale-data/jsonp ./~/promise?global,intl.[name]!^\.\/.*\.js$
 @ ./src/client.js
 @ multi main

I know supporting webpack v2 might not be a real priority for you, but any idea what this is?

When I log the thing that is not a function (at core.js line 59), I get the string contents of the module.

Handling errors

Is there a way to handle/catch errors? for example, network issues. So I can request the module again.

IE11 and global

For whatever reason, import something from 'promise?global....' does not work with IE11. I'm getting a Promise is undefined error.

I'm not sure there's anything that can be done about it, but I swapped to bluebird and it's all good. Just thought I should mention it.

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