ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge pull request #10032 from ahocevar/safe-listener-removal

Browse Source 
Do not remove listeners that do not exist
This commit is contained in:
Andreas Hocevar
2019-09-26 19:35:02 +02:00
committed by GitHub
parent 596c9617ed fd594c2001
commit 8b7d68676b
2 changed files with 14 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/ol/events/Target.js
View File

@@ -149,20 +149,19 @@ class Target extends Disposable {
* @param {import("../events.js").ListenerFunction} listener Listener.
*/
removeEventListener(type, listener) {
if (!type || !listener) {
return;
}
const listeners = this.listeners_[type];
if (listeners) {
const index = listeners.indexOf(listener);
if (type in this.pendingRemovals_) {
// make listener a no-op, and remove later in #dispatchEvent()
listeners[index] = VOID;
++this.pendingRemovals_[type];
} else {
listeners.splice(index, 1);
if (listeners.length === 0) {
delete this.listeners_[type];
if (index !== -1) {
if (type in this.pendingRemovals_) {
// make listener a no-op, and remove later in #dispatchEvent()
listeners[index] = VOID;
++this.pendingRemovals_[type];
} else {
listeners.splice(index, 1);
if (listeners.length === 0) {
delete this.listeners_[type];
}
}
}
}

5
test/spec/ol/events/eventtarget.test.js
View File

@@ -64,9 +64,12 @@ describe('ol.events.EventTarget', function() {
eventTarget.removeEventListener('foo', spy1, false);
expect(eventTarget.listeners_['foo']).to.have.length(1);
});
it('does nothing when called with undefined listener', function() {
it('does not remove listeners when the specified listener is not found', function() {
eventTarget.addEventListener('foo', spy1);
eventTarget.addEventListener('foo', spy2);
eventTarget.removeEventListener('foo', undefined);
eventTarget.removeEventListener('foo', spy2);
eventTarget.removeEventListener('foo', spy2);
expect(eventTarget.listeners_['foo']).to.eql([spy1]);
});
});