Created
February 3, 2020 04:09
-
-
Save sstur/a47a69394375e6d5cd2838a19061dbf0 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import { useEffect, useState } from 'react'; | |
let loadedScripts: Map<string, Promise<null>> = new Map(); | |
export default function useScript(src: string) { | |
let [isLoaded, setLoaded] = useState(false); | |
useEffect(() => { | |
let promise = loadedScripts.get(src) || loadScript(src); | |
promise.then(() => { | |
setLoaded(true); | |
}); | |
}, []); | |
return isLoaded; | |
} | |
function loadScript(src: string) { | |
let promise: Promise<null> = new Promise((resolve, reject) => { | |
let script = document.createElement('script'); | |
script.src = src; | |
script.async = true; | |
script.addEventListener('load', () => { | |
resolve(null); | |
}); | |
script.addEventListener('error', (event: Event) => { | |
script.parentNode && script.parentNode.removeChild(script); | |
reject(event); | |
}); | |
document.head && document.head.appendChild(script); | |
}); | |
loadedScripts.set(src, promise); | |
return promise; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment