Quasar 
Ajax Bar
Ajax Bar is a component which displays a loading bar (like Youtube) whenever an Ajax call (regardless of Ajax library used) is in progress. It can be manually triggered as well.
Installation
Edit /quasar.conf.js:framework: {
components: ['QAjaxBar']
}
Basic Usage
As long as this component is rendered by Vue it will capture all Ajax calls.<q-ajax-bar />
Best way is to place it in your App root component (App.vue if you are using the default Quasar template):<template>
<div id="q-app">
<router-view></router-view>
<q-ajax-bar />
</div>
</template>
IMPORTANT
Do not simultaneously use more than one Ajax Bar component in your App.
Vue Properties
| Vue Property | Type | Default Value | Description |
|---|---|---|---|
position | String | ‘top’ | Where to place the loading bar: ‘top’, ‘bottom’, ‘left’ or ‘right’. |
size | String | ‘4px’ | Thickness of loading bar. |
color | String | ‘red’ | One from Quasar Color Palette. |
speed | Number | 250 | How fast should loading bar update its value (in milliseconds). |
delay | Number | 1000 | How much should loading bar wait before showing loading bar after it’s triggered (in milliseconds). |
reverse | Boolean | false | Reverse direction of loading bar. |
Vue Methods
Only if you want to also trigger it manually. Ajax calls trigger these methods automatically.
| Vue Method | Description |
|---|---|
start() | Trigger loading bar. |
stop() | Notify one event has finished. |
Vue Events
| Vue Event | Description |
|---|---|
@start | Triggered when loading bar has been triggered to be displayed. |
@stop | Triggered when loading bar finished its work and goes hidden. |
If multiple events are captured by Ajax Bar simultaneously,
@startand@stopwill still be triggered only once: when loading bar starts showing up and when it goes hidden.
How start/stop works
Each Ajax call makes a start() call when it is triggered. When it ends, it calls stop(). So yes, if you also manually trigger Ajax Bar you must call start() each time a new event is starting and stop() each time an event finished. Ajax Bar knows to handle multiple events simultaneously.