Function watchXpath

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

Example

const watcher = watchXpath(ctx, '//div', {
  async enter: (el: ElementHandle) => {
    // Do something with the matched el when it appears
  },
  async leave: (el: ElementHandle) => {
    // Do something with the matched el when it disappears
  },
});
// ...
watcher.stop()
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