【纯前端】微信小程序验证码

 

index.wxml

  验证码:
  <input type='text' bindinput='makecodeInput'/>
  <view class='makecode' bindtap='getcode'>{{code}}</view>
    <button bindtap="login">登录</button>

index.js

data: {
    code: "",
    makecode:"",
  },
 //获取输入验证码
  makecodeInput:function(e){
    this.setData({
      makecode:e.detail.value
    })
  },
// 登录
  login: function() {
    if(this.data.makecode != this.data.code){
      wx.showToast({
        title: '验证码不正确',
        icon: 'none',
        duration: 2000
      })
    }
 },
 //验证码
  createCode() {
    var code;
    //首先默认code为空字符串
    code = '';
    //设置长度,这里看需求,我这里设置了4
    var codeLength = 4;
    //设置随机字符
    var random = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
    //循环codeLength 我设置的4就是循环4次
    for (var i = 0; i < codeLength; i++) {
      //设置随机数范围,这设置为0 ~ 10
      var index = Math.floor(Math.random() * 10);
      //字符串拼接 将每次随机的字符 进行拼接
      code += random[index];
    }
    //将拼接好的字符串赋值给展示的code
    this.setData({
      code: code
    })
  },
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function(options) {
    this.createCode();
  },
  getcode: function() {
    this.createCode();
  },

懒人下载链接:https://download.csdn.net/download/sanghongxv/10712868

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转载自blog.csdn.net/SangHongxv/article/details/82977874