Angular Interview Practice

How can HTML attributes be accessed in JavaScript?

1. Using the element.propertyName method

2. Using getElementById()

3. Using getAttribute() and setAttribute() methods

4. Using the querySelectorAll() method

The correct answer is: Using getAttribute() and setAttribute() methods

Accessing HTML attributes in JavaScript is primarily done through the getAttribute() and setAttribute() methods, which directly interact with the attributes of HTML elements. These methods allow you to retrieve the value of a specific attribute on an element or to set a new value for an existing attribute, respectively. This approach is particularly useful when you need to work with attributes that do not directly correspond to a property of the DOM object. For instance, if you have an HTML element like `<input id="myInput" type="text" value="Hello">`, you can retrieve the value of the `type` attribute using `element.getAttribute('type')`, which would return `"text"`. Similarly, you can change the value of the `value` attribute by using `element.setAttribute('value', 'New Value')`, which alters the input’s value. While other methods such as accessing properties directly or using document selectors do provide ways to interact with elements, they do not specifically focus on the attributes themselves in the way that getAttribute() and setAttribute() do. This makes the correct answer clearly centered around using these two attribute methods for precise attribute manipulation.