vue+element 登录密码显示隐藏

<template>
    <div id='test'>
        <el-form :model="formPassword" labelWidth="80px" label-position="left">
        <el-form-item label="旧密码">
          <el-input type="password" v-model="formPassword.oldPassword" placeholder="请输入旧密码"></el-input>
        </el-form-item>
        <el-form-item v-if="visible" label="新密码">
          <el-input type="password" v-model="formPassword.newPassword" placeholder="请输入新密码">
            <i slot="suffix" title="显示密码" @click="changePass('show')" style="cursor:pointer;"
               class="el-input__icon iconfont icon-xianshi"></i>
          </el-input>
        </el-form-item>
        <el-form-item v-else label="新密码">
          <el-input type="text" v-model="formPassword.newPassword" placeholder="请输入新密码">
            <i slot="suffix" title="隐藏密码" @click="changePass('hide')" style="cursor:pointer;"
               class="el-input__icon iconfont icon-yincang"></i>
          </el-input>
        </el-form-item>
      </el-form>
    </div>
</template>
<script>
    export default {
    data() {
      return {
        formPassword: {
          oldPassword: '',
          newPassword: ''
        },
        visible: true      
      }
    },
    methods: {
      changePass(value) {
        this.visible = !(value === 'show');
      }    //判断渲染，true:暗文显示，false:明文显示
    }
  }
</script>