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What is the best alternative to SystemJS?
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Qoopido.demand
All
16
Experiences
Pros
16
Top
Pro
Supports localStorage caching
Modules will get loaded via XHR/XDR and get cached in localStorage to prevent further requests which improves performance escpecially on mobile
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Pro
Fallback URLs
Any type of dependency can have multiple URLs defined to be used as fallback.
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Pro
Additional support for loading HTML, CSS, JSON, and text
Loading is dealt with via handlers that are themselves modules (dynamically loaded and cached). Qoopido.demand comes with support for its own module format built-in and offers handlers for css, json and text. Due to handlersbeing modules themselves it is really easy to write custom handlers.
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Pro
Optional support for SRI (sub resource integrity)
Support for SHA256, 384 and 512 identity checks for all types of loaded modules was added in version 2.0.7
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Pro
Offers internal auto-bundling to reduce the number of requests
By taking advantage of auto-bundling, it means that demand itself will combine requests without the user having to manually define a bundle.
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Pro
Supports sourcemaps
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Pro
Optional lz-string compression of localStorage cache content
Cached modules can be optionally & automatically compressed with lz-string loading a plugin (included in the distribution) either globally or on a per module or even per path/part of path base.
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Pro
Per module setting of cache parameters
Version 1.1.2 of Qoopido.demand adds the possibility to not only set global caching parameters valid for all modules but allows for fine grained cache control on a per module basis.
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Pro
Can load new modules without being recompiled
It's the one of the few modules in this category that can handle IOC-style dependency injection. The others work well for apps that have knowable dependency lists at compile time, but this is one of the few that can load new modules without being recompiled.
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Pro
Optional cookie support to communicate module caching state to the server
Cookie support within Qoopido.demand can be enabled globally or per module. Whenever the localStorage cache for a module changes an accompanying cookie gets updated/deleted so the server can handle the clients module caching state and, e.g., inline modules as long as the client das not have them in localStorage.
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Pro
Supports loading of non-module scripts
Qoopido.demand offers loading of legacy scripts as if they were modules through probe functions. These probe functions are similiar to Require.js shim, but where shim allows only string parameters, Qoopido.demand's probes are JavaScript functions that can check whatever you want.
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Pro
Promise like interface
Although not depending on native promise support it offers a promise like interface which greatly improves readability of code
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Pro
Supports nested dependencies
Dynamically loaded modules can have further dependencies that will get dynamically resolved and loaded
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Pro
localStorage caching removes the need to bundle
It enables and encourages the development of atomic modules that do not necessarily have to get bundled (manually or via build-process) to gain performance
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Pro
Support for legacy browsers
Qoopido.demand has recently added support for legacy browsers. Including IE8.
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Pro
Supports loading of bundles
From version 1.1.1 onwards Qoopido.demand is able to load multiple concatenated modules in a single request (like jsdelivr) while maintaining automatic module resolution.
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Experiences
Free
4
0
stealjs
All
10
Experiences
Pros
9
Cons
1
Top
Pro
Supports several modules types
StealJS has support for AMD, CJS and ES6 module types.
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Con
Changing the order of require statements causes unexpected behavior
Sometimes changing the order of the require statements in a JavaScript file loaded with stealjs may cause unexpected problems or even breaking the code altogether.
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Pro
Support for LESS and CSS
StealJS can also load CSS and LESS files in addition to JavaScript modules.
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Pro
Mix ES6 AMD and CommonJS
StealJS supports using all three module types, even in the same file.
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Pro
ES6 module support
StealJs supports ES6 modules and their import and export methods without having to compile them to CommonJS require.
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Pro
Support for ES6
StealJS supports transpiling of ES6 code to ES5
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Pro
Supports all systemjs based plugins
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Pro
Supports source maps for easier debugging
Source maps allow for easier debugging, because they allow you to find the problems within the origin files instead of the output file.
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Pro
Share the same modules client-side and server-side
Because StealJS allows you to use the same require() function as node.js, you can easily share modules between the client-side and server-side.
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Pro
Tap into npm's huge module ecosystem
Using StelaJS opens you up to npm, that has over 80k modules of which a great amount work both client-side and server-side. And the list is growing rapidly.
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Experiences
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12
1
JSPM
All
14
Experiences
Pros
9
Cons
5
Top
Pro
Registry agnostic
JSPM is registry agnostic, it can pull packages from npm and github and is built in such a way it can support more.
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Con
You need to be an expert to write shims
You can load any module. But that comes with the price: you need to find or write configs to load a particular rare module.
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Pro
Module style agnostic
Loads ES6, AMD, CommonJS and globals.
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Con
Doesn't hide complexity
JSPM doesn't try to hide complexity from the user. I.e. when some issue emerges you need understand a lot to be able to patch it or create a workaround.
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Pro
Can transcompile ES6, JSX and Typescript
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Con
Watcher has bugs
Watching would benefit from improvements
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Pro
Much faster than Webpack or Browserify
While Webpack and Browserify recompile the source code using Babel, jspm is the only packager that can load prebuild/minified code downloaded from the npm registry.
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Con
Unstable API
0.17 is still in beta. 0.16 is lacking features.
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Pro
Bundled based on imported modules without any config
Create the bundle file without config and add only the modules imported.
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Con
Poor bundler performance
Bundling performance is slow, though offset by the fact that bundling is not required during development, since it can load dependencies asynchronously.
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Pro
Switch between async or sync load
With a simple command you could change between load the modules async by systemjs or sync with a bundle file.
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Pro
Easy install packages from npm, github or any git repository
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Pro
Versioned package urls
It creates a packages folders which are versioned. This makes it future proof for a time where we stop bundling all the code. In the following presentation Guy Bedford calls bundling an anti-pattern.
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Pro
Very easy to start with
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Experiences
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39
8
RequireJS
All
16
Experiences
Pros
12
Cons
4
Top
Pro
Works with basically every desktop browser, even IE6
RequireJS supports IE6+, FF2+, Safari3.2+, Chrome3+ & Opera 10+.
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Con
On its way out
Latest stable release is 2 months old with little development occurring on Github.
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Pro
Well documented
The RequireJS module loader is extremely well documented. So no matter whether you're a pro at JS based web development or just a newbie, you will find the documentation very helpful whenever you're stuck or just starting out. Everything is well-defined and logically placed in proper sections in a manner such that it is very easy to understand.
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Con
Poor handling of circular references
If you create a circular reference between two files, it will typically quietly break - the reference on one side will end up undefined.
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Pro
You don't need a server to get started
One of the best advantages of RequireJS over Browserify is that you don't need a nodejs environment to get started. Just "require" your dependencies and it takes care of loading them. By contrast, Browserify requires a running NodeJS implementation so you can build your one monolithic file, then you can push the file to your static web server.
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Con
AMD spec uses globals
The global ‘require’ and ‘define’ methods make namespace collisions likely if building a 3rd party plugin. AMD loaders line require are best if you control the site.
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Pro
Has a RequireJS optimizer
After building all the modules to be loaded, the built files can be optimized as well (minified and concatenated), even though this is a completely optional step, but doing so could be a lot beneficial for your site's performance.
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Con
Can't handle CSS dependencies
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Pro
Lazily-loaded JS can access already loaded modules by name
Yet its run-time is still competitive if not better than Webpack's at higher density levels of modules.
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Pro
Always running site unbundled
With other loaders, aka browserify, it isn't possible to run your site without first bundling. Require.js can load everything async which is pretty powerful.
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Pro
Supports nested dependencies
If your project has nested dependencies, you won't have to worry about resolving them at all. Because RequireJS will do that for you.
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Pro
Well tested
Since the RequireJS is quite popular among the dev community, that automatically means that problems get sorted out very quickly and most of the core code has already been tested.
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Pro
AMD & CJS support
While RequireJS is mainly an AMD implementation, it can, with rare exceptions, implement CJS as well.
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Pro
Simple
Because of its easy to understand documentation, the RequireJS module loader is super simple to use; module definitions are as easy as defining just a key/value pair.
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Pro
Can load new modules without being recompiled
It's the one of the few modules in this category that can handle IOC-style dependency injection. The others work well for apps that have knowable dependency lists at compile time, but this is the only one that can load new modules without being recompiled.
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Pro
Supports hot RE-loading
Persistent console logging, generational statefulness, promotes stateless DOM development.
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Experiences
Free
47
26
Curl.js
All
5
Experiences
Pros
4
Cons
1
Top
Pro
Size ~4KB (gzipped)
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Con
Development has stopped
The maintainers have announced that all development for CurlJS has stopped, at least for the foreseeable future.
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Pro
Async loading on demand
Async loading on demand including loadings from cdns. For example it is easy to load jquery from cdn as a module. The same thing is not that easy to achieve in Webpack
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Pro
Provides legacy loader
Legacy loader supports loading of plain js files and exporting globals or even expressions.
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Pro
AMD & CJS module support
Supports both AMD and CommonJS modules.
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1
1
Gourmet
All
8
Experiences
Pros
4
Cons
4
Top
Con
Feature set is unclear
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Pro
Friendly asset handling
Auto-asset inclusion, native CSS support, and flexible bundling make handling your assets simple.
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Con
Not available yet
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Pro
ES6 support
Supports ES6 syntax by default.
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Con
Zero documentation
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Pro
Easy configuration
Declarative configuration makes project setup easy.
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Con
Browser support unknown
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Pro
Isomorphic rendering by default
The runtime environment allows for isomorphic rendering of React applications by default.
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1
4
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