This component receives one input, the CSS selector of the DOM element you want to make sure is on the page.
Only after it is detected an event will be triggered, so that you can run your action then. Additionally, the event will pass as an input the detected element, so you can modified it right away. You can also ignore this input if you don't have use for it.
Added the possibility to cancel the search for an element;
Added OnDestroy behavior;