chriscavs / bounds.js Goto Github PK

Hi,
in our error logging system we've got messages complaining that
Cannot set property 'history' of undefined

This is the only place in the code where history is assigned.

This happens only in Chrome versions 51-57 which are known to have missing isIntersecting
https://caniuse.com/#feat=intersectionobserver
and this should be polyfilled correctly
https://github.com/w3c/IntersectionObserver/blob/d3eece49746574f43798d411d9fea2968251b075/polyfill/intersection-observer.js#L23-L34

I was trying to use Chromium of those old versions but nothing fails with the polyfill included.

Also the demo page
https://chriscavs.github.io/bounds-demo/
in this Chromium version (macOS 53.0.2767.0 (64-bit) to be exact) does not correctly loads lazy loading images. Top example works ok. I see that polyfill is included in the bundle.
https://chriscavs.github.io/bounds-demo/dist/bundle.js
Maybe that's somehow related. No errors in Chromium console though.

Chromium versions if someone would like to test it.
https://commondatastorage.googleapis.com/chromium-browser-snapshots/index.html

Any ideas what might be going on and why data might be undefined?

When invoking bound.js without an options parameter like ...

const windowBound = Bounds();

... I get the error bounds.js:1 Uncaught TypeError: Cannot read property 'root' of undefined.

Using an empty param (const windowBound = Bounds({});) as a workaround.