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Merge pull request #3659 from matrix-org/dbkr/matchmedia_conditional_events_rel

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Make addEventListener conditional
This commit is contained in:
David Baker
2019-11-22 13:20:50 +00:00
committed by GitHub
parent 9bb486781b 521cbbac74
commit cc79afb99d
1 changed files with 8 additions and 4 deletions
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4
src/theme.js
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@@ -41,14 +41,18 @@ export class ThemeWatcher {
start() {
this._themeWatchRef = SettingsStore.watchSetting("theme", null, this._onChange);
this._systemThemeWatchRef = SettingsStore.watchSetting("use_system_theme", null, this._onChange);
if (this._preferDark.addEventListener) {
this._preferDark.addEventListener('change', this._onChange);
this._preferLight.addEventListener('change', this._onChange);
}
this._dispatcherRef = dis.register(this._onAction);
}
stop() {
if (this._preferDark.addEventListener) {
this._preferDark.removeEventListener('change', this._onChange);
this._preferLight.removeEventListener('change', this._onChange);
}
SettingsStore.unwatchSetting(this._systemThemeWatchRef);
SettingsStore.unwatchSetting(this._themeWatchRef);
dis.unregister(this._dispatcherRef);