svelte-knob

Knob control for Svelte.js

Install

npm install svelte-knob --save

Demo

https://svelte.dev/repl/609b8f2e4540442197fc12cbc4165d55?version=3.31.1

Usage

import Knob from 'svelte-knob'

Examples

Most basic usage:

<Knob value={50} />
<Knob value={30} step={10} strokeWidth={8} primaryColor="#E844C3" secondaryColor="#E7B6DC" textColor="#E844C3"/>
<Knob value={45} min={-10} max={100} />

Responsive

Set the component responsive.

Size property is always available, be careful if size is more than 100, size is expressed in % in this mode

<Knob
    responsive={true}
/>

Animation:

Disabled by default

animated true|false
This will disable/enable knob animation but not value one.

animateValue true|false
Same as animation expect for the value.

animationDuration integer, in milliseconds
set the duration of both animation.

animationFunction string
CSS animation function, all CSS animations are available (eg: linear, ease-in, ease-out, ...).

Examples

Only animate knob itself

<Knob
    animation="{
        animated: true
    }"
/>

Only animate knob value

<Knob
    animation="{
        animateValue: true
    }"
/>

animated and animateValue can be set at the same time

This animation use CSS linear function during 5 sec

<Knob
    animation="{
        animated: true,
        animateValue: true,
        animationDuration: '5000',
        animationFunction: 'linear'
    }"
/>

animationDuration should be expressed in ms (you can use multiplication if you prefer eg: "5 * 1000")

Properties

The only required property is value.

Option Type Description Default
value Number Use the value attribute to set the value of the control none
max Number Maximum value of the control 100
min Number Minimum value of the control 0
step Number Smallest increment the value can change by 1
disabled Boolean Set to true to disable the knob false
size Number Visual size of the control in px (or % if responsive is true) 100
primaryColor String Color of the value arc #409eff
secondaryColor String Color of the rest of the control #dcdfe6
textColor String Color of the value text #000000
strokeWidth Number Thickness of the arcs 17
valueDisplayFunction Function Custom function to alter the display text (v) => v
responsive Boolean Use % instead of px false
animation Object Optional animation config object: { animated: false, animateValue: false, animationDuration: 2000 (in ms), animationFunction: 'ease-in-out' } null

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