Consider the following situation where a bulb is present and there are two buttons to turn on and off the bulb which functions the same as a switch of an actual bulb. Which feature in Javascript allows the user to do so?

The feature in Javascript that allows a user to turn on and off a bulb (or any similar action) is called Event Handling.

Here's a step-by-step explanation:

1. Event Handling: This is a procedure or function in a computer program that waits for specific events to occur, like clicking a button.

2. In the context of the bulb and two buttons, you would use event handlers on the buttons. These event handlers would be functions that are called when the 'click' event is fired on the buttons.

3. For the 'Turn On' button, you would have a function that changes the state of the bulb to 'On'. This could involve changing the color of the bulb, changing a text label from 'Off' to 'On', etc.

4. For the 'Turn Off' button, you would have a similar function that changes the state of the bulb to 'Off'.

5. These functions would be attached to the buttons using event listeners. An event listener is a procedure in JavaScript that waits for an event to occur. The simple syntax for creating an event listener is: element.addEventListener(event, function, useCapture);

6. In this case, the 'event' would be 'click', the 'function' would be the function to turn the bulb on or off, and 'useCapture' is optional.

This is a basic explanation and the actual implementation could vary based on the specifics of the situation.