Quasar is a popular Vue UI library for developing good looking Vue apps.
In this article, we’ll take a look at how to create Vue apps with the Quasar UI library.
Knob
We can add the q-knob component to show a circular loading indicator.
For instance, we can write:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
<style>
.example-item {
height: 200px;
width: 200px;
}
</style>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<q-layout
view="lHh Lpr lFf"
container
style="height: 100vh;"
class="shadow-2 rounded-borders"
>
<div class="q-pa-md">
<q-knob
v-model="value"
size="90px"
:thickness="0.2"
color="purple-3"
center-color="purple"
track-color="purple-1"
class="q-ma-md"
>
</q-knob>
</div>
</q-layout>
</div>
<script>
new Vue({
el: "#q-app",
data: {
value: 75
}
});
</script>
</body>
</html>
to add the loading indicator.
size is the diameter.
color has the color of the ring that’s not filled.
center-color has the center part’s color.
track-color has the outer ring’s color.
thickness has the thickness of the ring.
We can populate the default slot to add content inside the loading indicator:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
<style>
.example-item {
height: 200px;
width: 200px;
}
</style>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<q-layout
view="lHh Lpr lFf"
container
style="height: 100vh;"
class="shadow-2 rounded-borders"
>
<div class="q-pa-md">
<q-knob
show-value
font-size="16px"
class="text-red q-ma-md"
v-model="value"
size="60px"
:thickness="0.05"
color="red"
track-color="grey-3"
>
<q-icon name="volume_up" class="q-mr-xs"></q-icon>
{{ value }}
</q-knob>
</div>
</q-layout>
</div>
<script>
new Vue({
el: "#q-app",
data: {
value: 75
}
});
</script>
</body>
</html>
We can also add the min and max props to add min and max values for the loading indicator.
The ring’s perimeter is display proportional to the min and max values:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
<style>
.example-item {
height: 200px;
width: 200px;
}
</style>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<q-layout
view="lHh Lpr lFf"
container
style="height: 100vh;"
class="shadow-2 rounded-borders"
>
<div class="q-pa-md">
<q-knob
show-value
font-size="16px"
class="text-red q-ma-md"
v-model="value"
size="60px"
:thickness="0.05"
color="red"
track-color="grey-3"
:min="5"
:max="10"
>
<q-icon name="volume_up" class="q-mr-xs"></q-icon>
{{ value }}
</q-knob>
</div>
</q-layout>
</div>
<script>
new Vue({
el: "#q-app",
data: {
value: 8
}
});
</script>
</body>
</html>
We can add the step prop to make the knob’s ring snap to the nearest multiple of the step value:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
<style>
.example-item {
height: 200px;
width: 200px;
}
</style>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<q-layout
view="lHh Lpr lFf"
container
style="height: 100vh;"
class="shadow-2 rounded-borders"
>
<div class="q-pa-md">
<q-knob
show-value
font-size="16px"
class="text-red q-ma-md"
v-model="value"
size="60px"
:thickness="0.05"
color="red"
track-color="grey-3"
:min="5"
:max="10"
:step="2"
>
<q-icon name="volume_up" class="q-mr-xs"></q-icon>
{{ value }}
</q-knob>
</div>
</q-layout>
</div>
<script>
new Vue({
el: "#q-app",
data: {
value: 9
}
});
</script>
</body>
</html>
Conclusion
We can add a knob component with Quasar to add a circular loading indicator into our Vue app.
