bootstrap-vue
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BootstrapVue provides one of the most comprehensive implementations of Bootstrap 4 components and grid system for Vue.js and with extensive and automated WAI-ARIA accessibility markup.
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# Progress
> Use our custom progress component for displaying simple or complex progress
bars, featuring support for horizontally stacked bars, animated backgrounds, and text labels.
```html
<template>
<div>
<b-progress :value="counter" :max="max" show-progress animated></b-progress>
<b-progress class="mt-1" :max="max" show-value>
<b-progress-bar :value="counter*(6/10)" variant="success"></b-progress-bar>
<b-progress-bar :value="counter*(2.5/10)" variant="warning"></b-progress-bar>
<b-progress-bar :value="counter*(1.5/10)" variant="danger"></b-progress-bar>
</b-progress>
<b-btn class="mt-4" @click="clicked">Click me</b-btn>
</div>
</template>
<script>
export default {
data () {
return {
counter: 45,
max: 100
}
},
methods: {
clicked () {
this.counter = Math.random() * this.max
console.log('Change progress to ' +
Math.round(this.counter * 100) / 100)
}
}
}
</script>
<!-- progress-1.vue -->
```
## Value
Set the maximum value with the `max` prop (default is `100`), and the current value via the
`value` prop (default `0`).
When creating multiple bars in a sinple process, place hte value prop on the individual
`<b-progress-bar>` sub components (see the **Multiple Bars** section below for more details)
## Labels
Add labels to your progress bars by either enabling `show-progress` (percentage of max) or
`show-value`for the current absolute value. You may also set the precision (number of
digits after the decimal) via the `precision` prop (default is `0`digits after the decimal).
```html
<template>
<div>
<h5>No label</h5>
<b-progress :value="value" :max="max" class="mb-3"></b-progress>
<h5>Value label</h5>
<b-progress :value="value" :max="max" show-value class="mb-3"></b-progress>
<h5>Progress label</h5>
<b-progress :value="value" :max="max" show-progress class="mb-3"></b-progress>
<h5>Value label with precision</h5>
<b-progress :value="value" :max="max" :precision="2" show-value class="mb-3"></b-progress>
<h5>Progress label with precision</h5>
<b-progress :value="value" :max="max" :precision="2" show-progress class="mb-3"></b-progress>
</div>
</template>
<script>
export default {
data () {
return {
max: 50,
value: 33.333333333
}
}
}
</script>
<!-- progress-labels.vue -->
```
### Custom progress label
Need more control over the label? Provide your own label by using the default slot within
a `<b-progress-bar>` sub-component, or by using the `label` prop on `<b-progress-bar>`
(HTML supported):
```html
<template>
<div>
<h5>Custom Label via Default Slot</h5>
<b-progress :max="max">
<b-progress-bar :value="value">
Progress: <strong>{{ value.toFixed(3) }} / {{ max }}</strong>
</b-progress-bar>
</b-progress>
<h5 class="mt-3">Custom Label via Prop</h5>
<b-progress :max="max">
<b-progress-bar :value="value" :label="'<'+value.toFixed(0)+'>'">
</b-progress-bar>
</b-progress>
</div>
</template>
<script>
export default {
data () {
return {
max: 50,
value: 33.333333333
}
}
}
</script>
<!-- progress-custom-labels.vue -->
```
Precedence order for label methods:
- default slot of `<b-progress-bar>`
- `label` prop of `<b-progress-bar>`
- `show-progress` prop of `<b-progress-bar>`
- `show-value` prop of `<b-progress-bar>`
- `show-progress` prop of `<b-progress>`
- `show-value` prop of `<b-progress>`
- no label
## Width and Height
`<b-progress>` will always expand to the maximum with of it's parent container. To
change the width, place `<b-progress>` in a standard Bootstrap column or apply
one of the standard Bootstrap width classes.
```html
<template>
<div>
<h5>Default width</h5>
<b-progress :value="value" class="mb-3"></b-progress>
<h5>Custom widths</h5>
<b-progress :value="value" class="w-75 mb-2"></b-progress>
<b-progress :value="value" class="w-50 mb-2"></b-progress>
<b-progress :value="value" class="w-25"></b-progress>
</div>
</template>
<script>
export default {
data () {
return {
value: 75
}
}
}
</script>
<!-- progress-width.vue -->
```
The height of the progress bar can be controled with the `height` prop. The height
value should be a standard CSS dimension (`px`, `rem`, `em`, etc). The default
height is `1rem`.
```html
<template>
<div>
<h5>Default height</h5>
<b-progress :value="value" show-progress class="mb-3"></b-progress>
<h5>Custom heights</h5>
<b-progress height="2rem" :value="value" show-progress class="mb-2"></b-progress>
<b-progress height="20px" :value="value" show-progress class="mb-2"></b-progress>
<b-progress height="2px" :value="value"></b-progress>
</div>
</template>
<script>
export default {
data () {
return {
value: 75
}
}
}
</script>
<!-- progress-height.vue -->
```
## Backgrounds
Use background variants to change the appearance of individual progress bars.
The default variant is `primary`.
### Solid background variants
```html
<template>
<div>
<div v-for="bar in bars" class="row mb-1">
<div class="col-sm-2">{{ bar.variant }}:</div>
<div class="col-sm-10 pt-1">
<b-progress :value="bar.value"
:variant="bar.variant"
:key="bar.variant"
></b-progress>
</div>
</div>
</div>
</template>
<script>
export default {
data () {
return {
bars: [
{variant: 'success', value: 75},
{variant: 'info', value: 75},
{variant: 'warning', value: 75},
{variant: 'danger', value: 75},
{variant: 'primary', value: 75},
{variant: 'secondary', value: 75},
{variant: 'dark', value: 75}
],
timer: null
}
},
mounted () {
this.timer = setInterval(() => {
this.bars.forEach(bar => bar.value = 25 + (Math.random() * 75))
}, 2000)
},
beforeDestroy () {
clearInterval(this.timer)
this.timer = null
}
}
</script>
<!-- progress-backgrounds.vue -->
```
### Striped backgrounds
Set `striped` to apply a stripe via CSS gradient over the progress bar’s
background variant.
```html
<template>
<div>
<b-progress :value="25" variant="success" :striped="striped" class="mb-2"></b-progress>
<b-progress :value="50" variant="info" :striped="striped" class="mb-2"></b-progress>
<b-progress :value="75" variant="warning" :striped="striped" class="mb-2"></b-progress>
<b-progress :value="100" variant="danger" :striped="striped" class="mb-2"></b-progress>
<b-button variant="secondary" @click="striped = !striped">
{{ striped ? 'Remove' : 'Add'}} Striped
</b-button>
</div>
</template>
<script>
export default {
data () {
return {
striped: true
}
}
}
</script>
<!-- progress-striped.vue -->
```
### Animated backgrounds
The striped gradient can also be animated by setting the `animated`prop.
```html
<template>
<div>
<b-progress :value="25" variant="success" striped :animated="animate" class="mb-2"></b-progress>
<b-progress :value="50" variant="info" striped :animated="animate" class="mb-2"></b-progress>
<b-progress :value="75" variant="warning" striped :animated="animate" class="mb-2"></b-progress>
<b-progress :value="100" variant="danger" :animated="animate" class="mb-3"></b-progress>
<b-button variant="secondary" @click="animate = !animate">
{{ animate ? 'Stop' : 'Start'}} Animation
</b-button>
</div>
</template>
<script>
export default {
data () {
return {
animate: true
}
}
}
</script>
<!-- progress-animated.vue -->
```
Notes:
- if `animated` is true, `striped` will automatically be enabled.
- Animated progress bars don’t work in Opera 12 — as they don’t support CSS3 animations.
## Multiple bars
Include multiple `<b-progress-bar>` sub-components in a `<b-progress>` component to build
a horizontally stacked set of progress bars.
```html
<template>
<div>
<b-progress :max="max" class="mb-3">
<b-progress-bar variant="primary" :value="values[0]"></b-progress-bar>
<b-progress-bar variant="success" :value="values[1]"></b-progress-bar>
<b-progress-bar variant="info" :value="values[2]"></b-progress-bar>
</b-progress>
<b-progress show-progress :max="max" class="mb-3"></b-progress-bar>
<b-progress-bar variant="primary" :value="values[0]"></b-progress-bar>
<b-progress-bar variant="success" :value="values[1]"></b-progress-bar>
<b-progress-bar variant="info" :value="values[2]"></b-progress-bar>
</b-progress>
<b-progress show-value striped :max="max" class="mb-3"></b-progress-bar>
<b-progress-bar variant="primary" :value="values[0]"></b-progress-bar>
<b-progress-bar variant="success" :value="values[1]"></b-progress-bar>
<b-progress-bar variant="info" :value="values[2]"></b-progress-bar>
</b-progress>
<b-progress :max="max" class="mb-3">
<b-progress-bar variant="primary" :value="values[0]" show-progress></b-progress-bar>
<b-progress-bar variant="success" :value="values[1]" animated show-progress></b-progress-bar>
<b-progress-bar variant="info" :value="values[2]" striped show-progress></b-progress-bar>
</b-progress>
</div>
</template>
<script>
export default {
data () {
return {
max: 100,
values: [ 15, 30, 20 ]
}
}
}
</script>
<!-- progress-multiple.vue -->
```
`<b-prgress-bar>` will inherit most of the props from the `<b-progress>` parent component,
but you can override any of the props by setting them on the `<b-progress-bar>`
Notes:
- `height`, if specified, should always set on the `<b-progress>` component.
- `<b-progress-bar>` will not inherit `value` from `<b-progress>`.
## Component Reference