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osr-discourse-src/plugins/chat/assets/javascripts/discourse/modifiers/chat/track-message-visibility.js
Roman Rizzi 0a5f548635
DEV: Move discourse-chat to the core repo. (#18776)
As part of this move, we are also renaming `discourse-chat` to `chat`.
2022-11-02 10:41:30 -03:00

24 lines
590 B
JavaScript

import Modifier from "ember-modifier";
import { inject as service } from "@ember/service";
import { registerDestructor } from "@ember/destroyable";
export default class TrackMessageVisibility extends Modifier {
@service chatMessageVisibilityObserver;
element = null;
constructor(owner, args) {
super(owner, args);
registerDestructor(this, (instance) => instance.cleanup());
}
modify(element) {
this.element = element;
this.chatMessageVisibilityObserver.observe(element);
}
cleanup() {
this.chatMessageVisibilityObserver.unobserve(this.element);
}
}