npm i vue2-verify

npm install --save vue-monoplasty-slide-verify

<template>
  <div>
  <canvas
      id="s-canvas"
      :width="contentWidth"
      :height="contentHeight"></canvas>
  </div>
</template>
<script>
export default {
  name: "identify",
  props: {
    identifyCode: {
      type: String,
      default: ''
    },
    fontSizeMin: {
      type: Number,
      default: 28
    },
    fontSizeMax: {
      type: Number,
      default: 40
    },
    backgroundColorMin: {
      type: Number,
      default: 180
    },
    backgroundColorMax: {
      type: Number,
      default: 240
    },
    colorMin: {
      type: Number,
      default: 50
    },
    colorMax: {
      type: Number,
      default: 160
    },
    lineColorMin: {
      type: Number,
      default: 40
    },
    lineColorMax: {
      type: Number,
      default: 180
    },
    dotColorMin: {
      type: Number,
      default: 0
    },
    dotColorMax: {
      type: Number,
      default: 255
    },
    contentWidth: {
      type: Number,
      default: 130
    },
    contentHeight: {
      type: Number,
      default: 40
    }
  },
  methods:{
    // 生成一個(gè)隨機(jī)數(shù)
    randomNum (min, max) {
      return Math.floor(Math.random() * (max - min) + min)
    },
    // 生成一個(gè)隨機(jī)的顏色
    randomColor (min, max) {
      let r = this.randomNum(min, max)
      let g = this.randomNum(min, max)
      let b = this.randomNum(min, max)
      return 'rgb(' + r + ',' + g + ',' + b + ')'
    },
    drawPic () {
      let canvas = document.getElementById('s-canvas')
      let ctx = canvas.getContext('2d')
      ctx.textBaseline = 'bottom'
      // 繪制背景
      ctx.fillStyle = this.randomColor(
          this.backgroundColorMin,
          this.backgroundColorMax
      )
      ctx.fillRect(0, 0, this.contentWidth, this.contentHeight)
      // 繪制文字
      for (let i = 0; i < this.identifyCode.length; i++) {
        this.drawText(ctx, this.identifyCode[i], i)
      }
      this.drawLine(ctx)
      this.drawDot(ctx)
    },
    drawText (ctx, txt, i) {
      ctx.fillStyle = this.randomColor(this.colorMin, this.colorMax)
      ctx.font =
          this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei'
      let x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
      let y = this.randomNum(this.fontSizeMax, this.contentHeight - 5)
      let deg = this.randomNum(-30, 30)
      // 修改坐標(biāo)原點(diǎn)和旋轉(zhuǎn)角度
      ctx.translate(x, y)
      ctx.rotate(deg * Math.PI / 270)
      ctx.fillText(txt, 0, 0)
      // 恢復(fù)坐標(biāo)原點(diǎn)和旋轉(zhuǎn)角度
      ctx.rotate(-deg * Math.PI / 270)
      ctx.translate(-x, -y)
    },
    drawLine (ctx) {
      // 繪制干擾線
      for (let i = 0; i < 2; i++) {
        ctx.strokeStyle = this.randomColor(
            this.lineColorMin,
            this.lineColorMax
        )
        ctx.beginPath()
        ctx.moveTo(
            this.randomNum(0, this.contentWidth),
            this.randomNum(0, this.contentHeight)
        )
        ctx.lineTo(
            this.randomNum(0, this.contentWidth),
            this.randomNum(0, this.contentHeight)
        )
        ctx.stroke()
      }
    },
    drawDot (ctx) {
      // 繪制干擾點(diǎn)
      for (let i = 0; i < 20; i++) {
        ctx.fillStyle = this.randomColor(0, 255)
        ctx.beginPath()
        ctx.arc(
            this.randomNum(0, this.contentWidth),
            this.randomNum(0, this.contentHeight),
            1,
            0,
            2 * Math.PI
        )
        ctx.fill()
      }
    }
  },
  watch: {
    identifyCode () {
      this.drawPic()
    }
  },
  mounted () {
    this.drawPic()
  }
}
</script>
<style lang="scss" scoped>
#s-canvas {
  height: 38px;
}
</style>

<template>
    <div @click="refreshCode" style="cursor: pointer;">
        <Identify :identifyCode="identifyCode" ></Identify>
    </div>
</template>
<script>
import Identify from '@/components/test/identify'
export default {
  name: "index",
  components:{
   Identify 
  },
  data(){
      return {
         identifyCode: '',
      // 驗(yàn)證碼規(guī)則
      identifyCodes: '123456789ABCDEFGHGKMNPQRSTUVWXYZ',
    } 
  },
  methods:{
    // 切換驗(yàn)證碼
    refreshCode() {
      this.identifyCode = ''
      this.makeCode(this.identifyCodes, 4)
      console.log(this.identifyCode)
    },
    // 生成隨機(jī)驗(yàn)證碼
    makeCode(o, l) {
      for (let i = 0; i<l; i++) {
        this.identifyCode += this.identifyCodes[
            Math.floor(Math.random() * (this.identifyCodes.length - 0) + 0)
            ]
      }
    },
    mounted() {
        this.refreshCode()
  }
}
</script>
<style scoped>
</style>