The interaction between JavaScript and HTML is handled via events that occur when the user or the browser manipulates a page. An event occurs when a webpage loads. When a user hits a button, it triggers an event. Other instances include pressing any key, closing or resizing a window, and so on.
You can use an HTML attribute with the name of the event handler to attach an event handler to an event connected with an HTML element. For example, when a button is clicked, you can use the following code: onclick="alert('Clicked!')" input type="button" value="Save"
The Event Loop's sole purpose is to keep track of the Call Stack and Callback Queue. If the Call Stack is empty, the Event Loop will push the first event from the queue to the Call Stack, essentially running it. In the Event Loop, such an iteration is known as a tick.
The runtime model of JavaScript is based on an event loop, which executes the code, collects and processes events, and executes queued sub-tasks. This model is distinct from models written in other languages such as C and Java.
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