archive/rsnext
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fix: ensure hidden iframe apps render in development mode (#39514)

Browse source
This commit is contained in:
Tim 2022-08-11 14:22:19 -07:00 committed by GitHub
parent 13a5eb2228
commit d510758b52
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

18
packages/next/client/dev/fouc.ts
View file

@ -1,12 +1,24 @@
// This wrapper function is used to avoid raising a Trusted Types violation.
const safeSetTimeout = (callback: () => void) => setTimeout(callback)
// This wrapper function is used to safely select the best available function
// to schedule removal of the no-FOUC styles workaround. requestAnimationFrame
// is the ideal choice, but when used in iframes, there are no guarantees that
// the callback will actually be called, which could stall the promise returned
// from displayContent.
//
// See: https://www.vector-logic.com/blog/posts/on-request-animation-frame-and-embedded-iframes
const safeCallbackQueue = (callback: () => void) => {
if (window.requestAnimationFrame && window.self === window.top) {
window.requestAnimationFrame(callback)
} else {
window.setTimeout(callback)
}
}
// This function is used to remove Next.js' no-FOUC styles workaround for using
// `style-loader` in development. It must be called before hydration, or else
// rendering won't have the correct computed values in effects.
export function displayContent(): Promise<void> {
return new Promise((resolve) => {
;(window.requestAnimationFrame || safeSetTimeout)(function () {
safeCallbackQueue(function () {
for (
var x = document.querySelectorAll('[data-next-hide-fouc]'),
i = x.length;