@material/linear-progress

What is @material/linear-progress?

@material/linear-progress is a Material Design component for displaying linear progress indicators. It provides a visual representation of the progress of a task, making it easy to integrate with React applications and ensuring a consistent look and feel with other Material Design components.

What are @material/linear-progress's main functionalities?

Indeterminate Progress

This feature allows you to display an indeterminate progress bar, which is useful when the duration of the task is unknown.

import React from 'react';
import { LinearProgress } from '@material-ui/core';

function IndeterminateProgress() {
  return <LinearProgress />;
}

export default IndeterminateProgress;

Determinate Progress

This feature allows you to display a determinate progress bar, which is useful when you can track the progress of a task.

import React, { useState } from 'react';
import { LinearProgress } from '@material-ui/core';

function DeterminateProgress() {
  const [progress, setProgress] = useState(0);

  React.useEffect(() => {
    const timer = setInterval(() => {
      setProgress((oldProgress) => {
        if (oldProgress === 100) {
          return 0;
        }
        const diff = Math.random() * 10;
        return Math.min(oldProgress + diff, 100);
      });
    }, 500);

    return () => {
      clearInterval(timer);
    };
  }, []);

  return <LinearProgress variant="determinate" value={progress} />;
}

export default DeterminateProgress;

Buffer Progress

This feature allows you to display a buffer progress bar, which is useful when you want to show both the progress and the buffer of a task.

import React, { useState } from 'react';
import { LinearProgress } from '@material-ui/core';

function BufferProgress() {
  const [progress, setProgress] = useState(0);
  const [buffer, setBuffer] = useState(10);

  React.useEffect(() => {
    const timer = setInterval(() => {
      setProgress((oldProgress) => {
        if (oldProgress === 100) {
          return 0;
        }
        const diff = Math.random() * 10;
        return Math.min(oldProgress + diff, 100);
      });
      setBuffer((oldBuffer) => {
        if (oldBuffer === 100) {
          return 10;
        }
        const diff = Math.random() * 10;
        return Math.min(oldBuffer + diff, 100);
      });
    }, 500);

    return () => {
      clearInterval(timer);
    };
  }, []);

  return <LinearProgress variant="buffer" value={progress} valueBuffer={buffer} />;
}

export default BufferProgress;

Query Progress

This feature allows you to display a query progress bar, which is useful when you want to indicate that a task is being queried.

import React from 'react';
import { LinearProgress } from '@material-ui/core';

function QueryProgress() {
  return <LinearProgress variant="query" />;
}

export default QueryProgress;

Other packages similar to @material/linear-progress

react-loader-spinner

react-loader-spinner provides a collection of customizable loading spinners for React applications. It offers a variety of spinner types, including linear progress bars, and is highly customizable in terms of size, color, and animation speed. Compared to @material/linear-progress, it provides more variety in loading indicators but may not adhere strictly to Material Design guidelines.

react-progressbar.js

react-progressbar.js is a React wrapper for ProgressBar.js, a library for creating animated progress bars. It supports linear and circular progress bars with customizable animations and styles. While it offers more animation options compared to @material/linear-progress, it may require more effort to integrate seamlessly with Material Design components.

nprogress

nprogress is a simple and lightweight progress bar library for web applications. It is often used for indicating page load progress and can be easily integrated with React. However, it lacks the variety of progress bar types and customization options available in @material/linear-progress.

README

Linear Progress

The MDC Linear Progress component is a spec-aligned linear progress indicator component adhering to the Material Design progress & activity requirements.

Design & API Documentation

• Guidelines
• Demo

Installation

npm install --save @material/linear-progress

Usage

<div role="progressbar" class="mdc-linear-progress">
  <div class="mdc-linear-progress__buffering-dots"></div>
  <div class="mdc-linear-progress__buffer"></div>
  <div class="mdc-linear-progress__bar mdc-linear-progress__primary-bar">
    <span class="mdc-linear-progress__bar-inner"></span>
  </div>
  <div class="mdc-linear-progress__bar mdc-linear-progress__secondary-bar">
    <span class="mdc-linear-progress__bar-inner"></span>
  </div>
</div>

CSS Modifiers

The provided modifiers are:

Class	Description
mdc-linear-progress--indeterminate	Puts the linear progress indicator in an indeterminate state.
mdc-linear-progress--reversed	Reverses the direction of the linear progress indicator.
mdc-linear-progress--accent	Colors the linear progress indicator with the secondary color.

Using the Foundation Class

MDC Linear Progress ships with an MDCLinearProgressFoundation class that external frameworks and libraries can use to integrate the component. As with all foundation classes, an adapter object must be provided. The adapter for linear progress must provide the following functions, with correct signatures:

Method Signature	Description
addClass(className: string) => void	Adds a class to the root element.
removeClass(className: string) => void	Removes a class from the root element.
hasClass(className: string) => boolean	Returns boolean indicating whether the root element has a given class.
getPrimaryBar() => Element	Returns the primary bar element.
getBuffer() => Element	Returns the buffer element.
setTransform(el: Element, value: string) => void	Sets the css transform property on the given element.

MDCLinearProgressFoundation API

MDC Linear Progress Foundation exposes the following methods:

Method Signature	Description
setDeterminate(value: boolean) => void	Toggles the component between the determinate and indeterminate state.
setProgress(value: number) => void	Sets the progress bar to this value. Value should be between [0, 1].
setBuffer(value: number) => void	Sets the buffer bar to this value. Value should be between [0, 1].
setReverse(value: boolean) => void	Reverses the direction of the linear progress indicator.
open() => void	Puts the component in the open state.
close() => void	Puts the component in the closed state.

MDCLinearProgress API

MDC Linear Progress exposes the following methods:

Method Signature	Description
set determinate(value: boolean) => void	Toggles the component between the determinate and indeterminate state.
set progress(value: number) => void	Sets the progress bar to this value. Value should be between [0, 1].
set buffer(value: number) => void	Sets the buffer bar to this value. Value should be between [0, 1].
set reverse(value: boolean) => void	Reverses the direction of the linear progress indicator.
open() => void	Puts the component in the open state.
close() => void	Puts the component in the closed state.