Function watchSelector

Watches an element by CSS selector, and executes code when it appears or disappears.

Example

const watcher = watchSelector(ctx, '.selector', {
  async enter: (el: ElementHandle) => {
    // do something with matched el when appeared
  },
  async leave: (el: ElementHandle) => {
    // do something with matched el when disappeared
  },
});
// ...
watcher.stop()
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