When comparing RequireJS vs Qoopido.demand, the Slant community recommends RequireJS for most people. In the question“What are the best client-side JavaScript module loaders?” RequireJS is ranked 3rd while Qoopido.demand is ranked 5th. The most important reason people chose RequireJS is:
RequireJS supports IE6+, FF2+, Safari3.2+, Chrome3+ & Opera 10+.
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Pros
Pro Works with basically every desktop browser, even IE6
RequireJS supports IE6+, FF2+, Safari3.2+, Chrome3+ & Opera 10+.
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.
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.
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.
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.
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.
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.
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.
Pro AMD & CJS support
While RequireJS is mainly an AMD implementation, it can, with rare exceptions, implement CJS as well.
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.
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.
Pro Supports hot RE-loading
Persistent console logging, generational statefulness, promotes stateless DOM development.
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
Pro Fallback URLs
Any type of dependency can have multiple URLs defined to be used as fallback.
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 handlers
being modules themselves it is really easy to write custom handlers.
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
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.
Pro Supports sourcemaps
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.
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.
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.
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.
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.
Pro Promise like interface
Although not depending on native promise support it offers a promise like interface which greatly improves readability of code
Pro Supports nested dependencies
Dynamically loaded modules can have further dependencies that will get dynamically resolved and loaded
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
Pro Support for legacy browsers
Qoopido.demand has recently added support for legacy browsers. Including IE8.
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.
Cons
Con On its way out
Latest stable release is 2 months old with little development occurring on Github.
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.
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.