fix: stop leaking event listeners #1059
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These static methods were storing the event listener callbacks on `this`, which refers to the (singleton) class itself. This meant that if multiple plugin instances existed at the same time (multiple editors on the same page), the second one would overwrite the stored event listeners for the first one, preventing the first one from actually removing the event listeners (and making it remove the second plugin's event listeners, potentially breaking its functionality). So instead, associate the event listeners with their target via a `Map` so multiple plugin instances can coexist. Also, at least in the CKEditor5 plugin, `Util.addElementEvents` was getting called twice during initialization, so make sure `Util.addElementEvents` removes any existing event handlers before adding the "new" ones.
bendemboski
requested review from
carla-at-wiris,
jgonzalez-at-wiris,
ncornaglia-at-wiris,
usantos-at-wiris and
xjiang-at-wiris
as code owners
carla-at-wiris
approved these changes
Sep 10, 2025
xjiang-at-wiris
approved these changes
Sep 10, 2025
usantos-at-wiris
approved these changes
Sep 12, 2025
ncornaglia-at-wiris
approved these changes
Sep 16, 2025
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Closes #1111 |
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Description
These static methods were storing the event listener callbacks on
this, which refers to the (singleton) class itself. This meant that if multiple plugin instances existed at the same time (multiple editors on the same page), the second one would overwrite the stored event listeners for the first one, preventing the first one from actually removing the event listeners (and making it remove the second plugin's event listeners, potentially breaking its functionality).So instead, associate the event listeners with their target via a
Mapso multiple plugin instances can coexist.Also, at least in the CKEditor5 plugin,
Util.addElementEventswas getting called twice during initialization, so make sureUtil.addElementEventsremoves any existing event handlers before adding the "new" ones.Type of Change
Checklist
yarn lintto check)How should be tested? (Manual or Automated Tests)