It can be useful to import a module for a single session without saving it as a scratchpad, or to be able to use it against a webpage.
Browsers support top-level await and ESM URL import, which are the keys to this. JSPM is a CDN that allows you to import any library as an ESM.
Suppose you want to import the latest version of
var request = await import('https://jspm.dev/request')
You can then extract the core
request.default. You can import a particular version by changing the url – e.g.
https://email@example.com for 2.27.0.
You can also import ESMs from other CDNs, such as Skypack.
This isn’t yet possible in Node (14) – while ESMs are supported with the
--experimental-modules flag, they can only be imported if already saved or as data URIs, not by URLs. Top-level await is supported with the