v-perfect-signature

Pressure-sensitive signature drawing for Vue 2 and 3 built on top of perfect-freehand.

Demo: https://wobsoriano.github.io/v-perfect-signature

Install

yarn add v-perfect-signature

Usage

<template>
  <VPerfectSignature :stroke-options="strokeOptions" ref="signaturePad" />
</template>

<script lang="ts">
import Vue from 'vue'
import VPerfectSignature, { StrokeOptions } from 'v-perfect-signature'

export default Vue.extend({
  components: {
    VPerfectSignature
  },
  data: () => ({
    strokeOptions: {
        size: 16,
        thinning: 0.75,
        smoothing: 0.5,
        streamline: 0.5
    } as StrokeOptions
  }),
  methods: {
    toDataURL() {
        const dataURL = this.$refs.signaturePad.toDataURL()
        console.log(dataURL)
    }
  }
})
</script>

Props

Name	Type	Default	Description
width	String	100%	Set canvas width
height	String	100%	Set canvas height
backgroundColor	String	rgba(0,0,0,0)	Canvas background color
penColor	String	#000	Canvas pen color
strokeOptions	Object	Reference	Perfect freehand options

Methods

Name	Argument Type	Description
toDataURL(type)	String	Returns signature image as data URL
fromDataURL(dataUri)	String	Draws signature image from data URL
toData	-	Returns signature image as an array of array of input points
fromData(data)	Array	Draws signature image from array of array of input points
clear()	-	Clears the canvas
isEmpty()	-	Returns true if canvas is empty
resizeCanvas(shouldClear)	Boolean	Resizes and recalculate dimensions

Note: Like signature_pad, fromDataURL does not populate internal data structure. Thus, after using fromDataURL, toData won't work properly.

Events

Name	Type	Default	Description
onBegin	Function	-	Fired when stroke begin
onEnd	Function	-	Fired when stroke end

Credits

• perfect-freehand - Draw perfect pressure-sensitive freehand strokes.
• signature_pad - HTML 5 canvas based smooth signature drawing.
• vue-signature-pad - Vue wrapper of signature_pad.
• vue-demi - Creates Universal Library for Vue 2 & 3

License

MIT - Copyright (c) 2021 Robert Soriano