React Js Get Element by ClassName

How can I use ReactJS to access a single element by its class name?

In this React.js code snippet, we are using the useEffect hook to access and manipulate a single element with a specific class name. First, we select all elements with the class name 'my-class' using the document.querySelectorAll method.

Then, we assign the second matched element to the variable element by indexing the resulting NodeList. Finally, we modify the style of the element by setting its color to red.

The code renders a container with three div elements, and the second div element will be styled with the color red.

How do you select elements by class name in React.js using document.getElementsByClassName?

This React Js code snippet utilizes React and the useEffect hook to apply a font size incrementally to paragraphs with the class name 'myClassName'. It starts with a base font size of 14 pixels and increases by 2 pixels for each subsequent paragraph. The useEffect runs once, emulating componentDidMount. The selected elements are obtained using getElementsByClassName, converted to an array, and their font sizes are set dynamically. The React component, wrapped in a div with class 'container', renders five paragraphs with the specified class name.

How can I access multiple elements with a specific class name in React.js?

In the given code, React is used to access multiple elements by their class name using the document.querySelectorAll() method. The useEffect() hook is used to execute the code inside it after the component has rendered.

Within the useEffect() callback, all elements with the class name "my-class" are selected using document.querySelectorAll('.my-class').

Then, each element is iterated over using the forEach() method, and its text color is set to green. The elements are logged to the console for demonstration purposes.