What is @fluentui/react-utilities?
@fluentui/react-utilities is a utility library for React that provides a set of helper functions and hooks to simplify common tasks when building Fluent UI components. It includes utilities for handling accessibility, styling, and other common React patterns.
What are @fluentui/react-utilities's main functionalities?
Accessibility Utilities
The `useId` hook generates a unique ID that can be used for accessibility purposes, such as associating labels with form elements.
import { useId } from '@fluentui/react-utilities';
function AccessibleComponent() {
const id = useId('example');
return <div id={id}>Accessible Content</div>;
}
Styling Utilities
The `mergeClasses` function allows you to combine multiple class names into a single string, which is useful for applying multiple styles to a component.
import { mergeClasses } from '@fluentui/react-utilities';
const className = mergeClasses('class1', 'class2');
function StyledComponent() {
return <div className={className}>Styled Content</div>;
}
Event Handling Utilities
The `useEventCallback` hook creates a stable callback function that can be used in event handlers, ensuring that the function reference does not change between renders.
import { useEventCallback } from '@fluentui/react-utilities';
function EventComponent() {
const handleClick = useEventCallback((event) => {
console.log('Button clicked', event);
});
return <button onClick={handleClick}>Click Me</button>;
}
Other packages similar to @fluentui/react-utilities
classnames
The `classnames` package provides a simple utility for conditionally joining class names together. It is similar to the `mergeClasses` function in @fluentui/react-utilities but focuses solely on class name manipulation.
react-aria
The `react-aria` package provides a collection of React hooks for building accessible components. It offers more comprehensive accessibility utilities compared to @fluentui/react-utilities, which includes only basic accessibility hooks.
emotion
The `emotion` package is a library designed for writing CSS styles with JavaScript. It offers more advanced styling capabilities compared to the basic styling utilities in @fluentui/react-utilities.
@fluentui/react-utilities
React Utilities for Fluent UI React components
API
childrenExist(children)
Tests if children are nil in React and Preact. React children
can be one many types. See the tests for all the covered cases.
Example:
if (childrenExist(props.children)) {
}