restore scroll state when timeline resizes using ResizeObserver

(only where supported, polyfill doesn't give good results)
This commit is contained in:
Bruno Windels 2019-02-21 18:51:18 +01:00
parent 68ba14909b
commit b3e6cbfddd

View file

@ -160,6 +160,13 @@ module.exports = React.createClass({
componentDidMount: function() {
this.checkScroll();
if (typeof ResizeObserver !== "undefined") {
this._timelineSizeObserver = new ResizeObserver(() => {
this._restoreSavedScrollState();
});
this._timelineSizeObserver.observe(this.refs.itemlist);
}
},
componentDidUpdate: function() {
@ -181,6 +188,10 @@ module.exports = React.createClass({
//
// (We could use isMounted(), but facebook have deprecated that.)
this.unmounted = true;
if (this._timelineSizeObserver) {
this._timelineSizeObserver.disconnect();
this._timelineSizeObserver = null;
}
},
onScroll: function(ev) {