Comments (5)
This version of Safari doesn't support Promises. You can use a Promise polyfill.
from greenlet.
So, the caveat here is just including a Promise polyfill in your code won't help. It has to go within the greenlet
'd function, correct?
from greenlet.
@rubencodes Good point, code inside the function is executing in it's own context inside a Web Worker. So you would need Promise
to be available in your code context too.
One possible workaround is passing a Promise polyfill down to your Web Worker code via simple dependency injection:
// Include greenlet and global Promise polyfill before this...
const resolveOnTruthy = greenlet((Promise, value) => {
return new Promise((resolve, reject) => {
value ? resolve() : reject('Sorry, not truthy...')
})
})
resolveOnTruthy(Promise, 1).then(() => console.log('Resolved!'))
Note that the polyfill inside the worker is not needed if you are using synchronous code.
You do need the global/main polyfill anyways because greenlet
use Promises internally.
from greenlet.
from greenlet.
2 other options:
greenlet(async function(value) {
importScripts('https://unpkg.com/[email protected]/dist/es6-promise.auto.min.js')
return await fetch('/foo')
})
greenlet(function(value) {
// promise stand-in
function callback(err, value) {setTimeout(()=>{callback[err?0:1](err || value)})}
callback.then=r=>{callback[0]=r}
callback.catch=r=>{callback[1]=r}
callback(null, value ? true : false)
return callback
})
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