vue使用响应式API和页面组件ref相同名称问题

最近在使用vue3+vite学习前端的东西。在学习form表单时发现，<el-form>里面的<el-input>绑定数据时，页面输入框在键盘输入之后没有反应，每次只能输入一各字母。

<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" autocomplete="on" label-position="left">
      <el-form-item prop="username">
        <el-input
            ref="username"
            v-model="loginForm.username"
            placeholder="Username"
            name="username"
            type="text"
            tabindex="1"
            autocomplete="on"
        />
      </el-form-item>
      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
        <el-form-item prop="password">
          <el-input
              :key="passwordType"
              ref="password"
              v-model="loginForm.password"
              :type="passwordType"
              placeholder="Password"
              name="password"
              tabindex="2"
              autocomplete="on"
              @keyup.native="checkCapslock"
              @blur="capsTooltip = false"
              @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>
      </el-tooltip>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">Login</el-button>
    </el-form>
  </div>
</template>

<script>
import {reactive, ref, getCurrentInstance, watch, onMounted, toRefs} from 'vue'
import { useRoute, useRouter } from 'vue-router'

export default {
  setup(){

    const validatePassword = (rule, value, callback) => {
      console.log(rule, value)
      if (value.length < 8) {
        callback(new Error('The password can not be less than 6 digits'))
      } else {
        callback()
      }
    }
    const {proxy} = getCurrentInstance();

    const loginForm = reactive({username: '', password: ''})

    const loginRules = reactive({
      username: [{ required: true, trigger: 'blur' }],
      password: [{ required: true, trigger: 'blur', validator: validatePassword }]
    })

    const passwordType = ref('password')
    const capsTooltip = ref(false)
    const loading = ref(false)
    const redirect =  ref(undefined)

    // 获取当前路由
    const route = useRoute()
    // 获取路由实例
    const router = useRouter()

    const checkCapslock = (e) => {
      const { key } = e
      capsTooltip.value = key && key.length === 1 && (key >= 'A' && key <= 'Z')
    }
    const showPwd = () => {
      if (passwordType === 'password') {
        passwordType.value = ''
      } else {
        passwordType.value = 'password'
      }
      this.$nextTick(() => {
        proxy.$refs.password.focus()
      })
    }
    const handleLogin = () => {
      console.log(loginForm)
      proxy.$refs.loginForm.validate(valid => {
        if (valid) {
          loading.value = true
          this.$store.dispatch('user/login', loginForm.value)
              .then(() => {
                router.push({ path: this.redirect || '/', query: otherQuery.value })
                loading.value = false
              })
              .catch(() => {
                loading.value = false
              })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }

    // 当前路由发生变化时，调用回调函数
    watch(() => route, () => {
      // 回调函数
      const query = route.query
      if (query) {
        redirect.value = query.redirect
      }
    }, {
      immediate: true,
      deep: true
    })

    onMounted(() => {
      const {proxy} = getCurrentInstance();
      if (loginForm.username === '') {
        proxy.$refs.username.focus()
      } else if (loginForm.password === '') {
        proxy.$refs.password.focus()
      }
    })

    return {
      loginForm, loginRules, passwordType, capsTooltip, loading, redirect,
      checkCapslock, showPwd, handleLogin
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

/* reset element-ui css */
.login-container {

  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;



.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  // 背景色设置为透明
  :deep(.el-input .el-input__wrapper){
    background-color:rgba(0,0,0,0);
    box-shadow: none;
    width: 100%;
  }

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .thirdparty-button {
    position: absolute;
    right: 0;
    bottom: 6px;
  }

  @media only screen and (max-width: 470px) {
    .thirdparty-button {
      display: none;
    }
  }
}
</style>

最后发现是，因为from表单的ref命名不能和数据对象一致：

最后将ref="loginForm"改成ref="loginFormRef"，和绑定的对象使用相同的命名即可。