About

Show a ProgressBar in React whenever a fetch request is in progress.

You can view a demo here.

Features

1. Only shows the ProgressBar when requests take more than 150 milliseconds. This way users are not looking at a progress bar needlessly.

2. When the requests finishes it will always show a nice 100% complete animation. This way users will always see the progress bar complete the animation.

3. The ProgressBar can be styled to your liking.

Installation

npm install react-fetch-progressbar --save

Usage

First you must override window.fetch with the progressbarFetch so the ProgressBar can knows whenever fetch is called:

import { progressBarFetch, setOriginalFetch } from 'react-fetch-progressbar';

// Let react-fetch-progressbar know what the original fetch is.
setOriginalFetch(window.fetch);

/* 
  Now override the fetch with progressBarFetch, so the ProgressBar
  knows how many requests are currently active.
*/
window.fetch = progressBarFetch;

Next you simply display the ProgressBar somewhere:

import { ProgressBar } from 'react-fetch-progressbar';

// Then somewhere in a render method:
<ProgressBar />

WARNING: only render one ProgressBar at a time, otherwise the two progressBars will interfere with each other.

Styling the ProgressBar

You have a two options, either provide a style object or create a CSS rule.

First these are the default styles, which are applied:

{
  position: 'absolute',
  top: '0',
  zIndex: '9000',
  backgroundColor: '#f0ad4e',
  height: '4px',
}

It is important that you never override the transition and the width property, otherwise the animation will not work.

Via style

Say you want a different height and backgroundColor you simply override the styles using:

<ProgressBar style={{ backgroundColor: 'red', height: '10px' }}/>

Via CSS

The class which is added on the progress bar is called .react-fetch-progress-bar you can extend that class and override properties like so:

.react-fetch-progress-bar {
  backgroundColor: red !important;
  height: 10px;
}