From 1fc6cb499742c1a872ad717a689c58a80aeb714d Mon Sep 17 00:00:00 2001 From: alpaca-tc Date: Wed, 21 Jun 2017 03:37:09 +0900 Subject: [PATCH] Do not call setState from unmounted component (#3853) Stop an executing task if the component already unmounted. --- app/javascript/mastodon/components/status.js | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/app/javascript/mastodon/components/status.js b/app/javascript/mastodon/components/status.js index 17f2eb9d30..8c44439674 100644 --- a/app/javascript/mastodon/components/status.js +++ b/app/javascript/mastodon/components/status.js @@ -86,6 +86,8 @@ class Status extends ImmutablePureComponent { this.node, this.handleIntersection ); + + this.componentMounted = true; } componentWillUnmount () { @@ -96,6 +98,8 @@ class Status extends ImmutablePureComponent { } this.props.intersectionObserverWrapper.unobserve(this.props.id, this.node); + + this.componentMounted = false; } handleIntersection = (entry) => { @@ -116,6 +120,10 @@ class Status extends ImmutablePureComponent { } hideIfNotIntersecting = () => { + if (!this.componentMounted) { + return; + } + // When the browser gets a chance, test if we're still not intersecting, // and if so, set our isHidden to true to trigger an unrender. The point of // this is to save DOM nodes and avoid using up too much memory.