The Quasar LoadingBar plugin offers an easy way to set up your app with a QAjaxBar in case you don’t want to handle a QAjaxBar component yourself.

For a demo, please visit the QAjaxBar documentation page.

// quasar.config.js

return {
  framework: {
    plugins: [
      'LoadingBar'
    ],
    config: {
      loadingBar: { /* look at QuasarConfOptions from the API card */ }
    }
  }
}

LoadingBar options are same as when configuring a QAjaxBar.

Usage

Inside Vue components:

import { useQuasar } from 'quasar'

setup () {
  const $q = useQuasar()

  $q.loadingBar.start()
  $q.loadingBar.stop()
  $q.loadingBar.increment(value)
}

Outside of Vue components:

import { LoadingBar } from 'quasar'

LoadingBar.start()
LoadingBar.stop()
LoadingBar.increment(value)

Setting Up Defaults

Should you wish to set up some defaults, rather than specifying them each time, you can do so by using quasar.config.js > framework > config > loadingBar: {…} or by calling LoadingBar.setDefaults({...}) or $q.loadingBar.setDefaults({...}). Supports all QAjaxBar properties.

Inside Vue components:

import { useQuasar } from 'quasar'

setup () {
  const $q = useQuasar()

  $q.loadingBar.setDefaults({
    color: 'purple',
    size: '15px',
    position: 'bottom'
  })
}

Outside of Vue components (includes boot files):

import { LoadingBar } from 'quasar'

LoadingBar.setDefaults({
  color: 'purple',
  size: '15px',
  position: 'bottom'
})

Using an Ajax filter

v2.4.5+

Should you want to trigger LoadingBar only for some URLs, then you can use the setDefaults() method (described above) to configure the hijackFilter property:

import { LoadingBar } from 'quasar'

LoadingBar.setDefaults({
  // return a Boolean which has the meaning of
  // "does this URL should trigger LoadingBar?"
  hijackFilter (url) {
    // example (only https://my-service.com/* should trigger)
    return /^https:\/\/my-service\.com/.test(url)
  }
})