Angular Interview Practice

Can JavaScript remove an HTML attribute and still retain its DOM property?

1. No, it will remove both

2. Yes, using removeAttribute() keeps the DOM property

3. Only if the attribute is conditional

4. Yes, but only for input elements

The correct answer is: Yes, using removeAttribute() keeps the DOM property

The correct answer highlights an important distinction between HTML attributes and DOM properties in JavaScript. When using the `removeAttribute()` method in JavaScript to remove an HTML attribute, the associated DOM property may still remain intact in the JavaScript object that represents the element. In practical terms, attributes are the original HTML properties when the page is loaded, while properties are the JavaScript representation of those attributes in the DOM. For example, if you have an input element with a `value` attribute in your HTML and then use JavaScript to remove this attribute, the associated `value` property can still be accessed and retains its current state. This means that the DOM will continue to function with the last value set before the attribute was removed, allowing the application to work as expected in many cases. The understanding of this behavior is particularly significant when developers need to manipulate DOM elements dynamically, as it enables them to control presentation and behavior without losing existing states. Understanding this distinction allows for more nuanced interactions with the DOM where the manipulation of attributes and properties does not always lead to the same outcome.