ion-progress-bar

Progress bars inform users about the status of ongoing processes, such as loading an app, submitting a form, or saving updates. There are two types of progress bars: determinate and indeterminate.

Progress Type

Determinate

Determinate is the default type. It should be used when the percentage of an operation is known. The progress is represented by setting the value property. This can be used to show the progress increasing from 0 to 100% of the track.

If the buffer property is set, a buffer stream will show with animated circles to indicate activity. The value of the buffer property will also be represented by how much visible track there is. If the value of buffer is less than the value property, there will be no visible track. If buffer is equal to 1 then the buffer stream will be hidden.

Indeterminate

The indeterminate type should be used when it is unknown how long the process will take. The progress bar is not tied to the value, instead it continually slides along the track until the process is complete.

Usage

Angular

<!-- Default Progressbar -->
<ion-progress-bar></ion-progress-bar>

<!-- Default Progressbar with 50 percent -->
<ion-progress-bar value="0.5"></ion-progress-bar>

<!-- Colorize Progressbar -->
<ion-progress-bar color="primary" value="0.5"></ion-progress-bar>
<ion-progress-bar color="secondary" value="0.5"></ion-progress-bar>

<!-- Other types -->
<ion-progress-bar value="0.25" buffer="0.5"></ion-progress-bar>
<ion-progress-bar type="indeterminate"></ion-progress-bar>
<ion-progress-bar type="indeterminate" reversed="true"></ion-progress-bar>

Javascript

<!-- Default Progressbar -->
<ion-progress-bar></ion-progress-bar>

<!-- Default Progressbar with 50 percent -->
<ion-progress-bar value="0.5"></ion-progress-bar>

<!-- Colorize Progressbar -->
<ion-progress-bar color="primary" value="0.5"></ion-progress-bar>
<ion-progress-bar color="secondary" value="0.5"></ion-progress-bar>

<!-- Other types -->
<ion-progress-bar value="0.25" buffer="0.5"></ion-progress-bar>
<ion-progress-bar type="indeterminate"></ion-progress-bar>
<ion-progress-bar type="indeterminate" reversed="true"></ion-progress-bar>

React

import React from 'react';
import { IonProgressBar, IonContent } from '@ionic/react';

export const ProgressbarExample: React.FC = () => (
  <IonContent>
    {/*-- Default Progressbar --*/}
    <IonProgressBar></IonProgressBar>
    <br />

    {/*-- Default Progressbar with 50 percent --*/}
    <IonProgressBar value={0.5}></IonProgressBar>
    <br />

    {/*-- Colorize Progressbar --*/}
    <IonProgressBar color="primary" value={0.5}></IonProgressBar>
    <br />
    <IonProgressBar color="secondary" value={0.5}></IonProgressBar>
    <br />

    {/*-- Other types --*/}
    <IonProgressBar value={0.25} buffer={0.5}></IonProgressBar>
    <br />
    <IonProgressBar type="indeterminate"></IonProgressBar>
    <br />
    <IonProgressBar type="indeterminate" reversed={true}></IonProgressBar>
    <br />
  </IonContent>
);

Stencil

import { Component, h } from '@stencil/core';

@Component({
  tag: 'progress-bar-example',
  styleUrl: 'progress-bar-example.css',
})
export class ProgressBarExample {
  render() {
    return [
      // Default Progressbar
      <ion-progress-bar></ion-progress-bar>,

      // Default Progressbar with 50 percent
      <ion-progress-bar value={0.5}></ion-progress-bar>,

      // Colorize Progressbar
      <ion-progress-bar color="primary" value={0.5}></ion-progress-bar>,
      <ion-progress-bar color="secondary" value={0.5}></ion-progress-bar>,

      // Other types
      <ion-progress-bar value={0.25} buffer={0.5}></ion-progress-bar>,
      <ion-progress-bar type="indeterminate"></ion-progress-bar>,
      <ion-progress-bar type="indeterminate" reversed={true}></ion-progress-bar>,
    ];
  }
}

Vue

<template>
  <!-- Default Progressbar -->
  <ion-progress-bar></ion-progress-bar>

  <!-- Default Progressbar with 50 percent -->
  <ion-progress-bar value="0.5"></ion-progress-bar>

  <!-- Colorize Progressbar -->
  <ion-progress-bar color="primary" value="0.5"></ion-progress-bar>
  <ion-progress-bar color="secondary" value="0.5"></ion-progress-bar>

  <!-- Other types -->
  <ion-progress-bar value="0.25" buffer="0.5"></ion-progress-bar>
  <ion-progress-bar type="indeterminate"></ion-progress-bar>
  <ion-progress-bar type="indeterminate" reversed="true"></ion-progress-bar>
</template>

<script>
  import { IonProgressBar } from '@ionic/vue';
  import { defineComponent } from 'vue';

  export default defineComponent({
    components: { IonProgressBar },
  });
</script>

Properties

buffer

Description	If the buffer and value are smaller than 1, the buffer circles will show. The buffer should be between [0, 1].
Attribute	buffer
Type	number
Default	1

color

Description	The color to use from your application's color palette. Default options are: "primary", "secondary", "tertiary", "success", "warning", "danger", "light", "medium", and "dark". For more information on colors, see theming.
Attribute	color
Type	string \| undefined
Default	undefined

mode

Description	The mode determines which platform styles to use.
Attribute	mode
Type	"ios" \| "md"
Default	undefined

reversed

Description	If true, reverse the progress bar direction.
Attribute	reversed
Type	boolean
Default	false

type

Description	The state of the progress bar, based on if the time the process takes is known or not. Default options are: "determinate" (no animation), "indeterminate" (animate from left to right).
Attribute	type
Type	"determinate" \| "indeterminate"
Default	'determinate'

value

Description	The value determines how much of the active bar should display when the type is "determinate". The value should be between [0, 1].
Attribute	value
Type	number
Default	0

CSS Shadow Parts

Name	Description
progress	The progress bar that shows the current value when type is "determinate" and slides back and forth when type is "indeterminate".
stream	The animated circles that appear while buffering. This only shows when buffer is set and type is "determinate".
track	The track bar behind the progress bar. If the buffer property is set and type is "determinate" the track will be the
width of the buffer value.

CSS Custom Properties

Name	Description
--background	Background of the progress track, or the buffer bar if buffer is set
--buffer-background	DEPRECATED, use --background instead
--progress-background	Background of the progress bar representing the current value