上代码:

    <el-form ref="loginform" :rules="rules" :model="login" label-width="30px">
              <el-form-item  prop="u_login_name">
                <el-input style="width: 75%" v-model="login.u_login_name" placeholder="请输入手机号或用户名" clearable>
                  <i slot="prefix" class="el-input__icon el-icon-user"></i>
                </el-input>
              </el-form-item>
              <el-form-item prop="u_password">
                <el-input style="width: 75%"  type="password" v-model="login.u_password" placeholder="请输入密码" clearable show-password>
                  <i slot="prefix" class="el-input__icon el-icon-key"></i>
                </el-input>
              </el-form-item>
              <el-form-item>
                <el-button style="width: 75%;background-color: #012F60;border: 1px solid #DDA600; margin-top: 15px"  type="primary" :loading="isloading" @click="submitLogin('loginform')" @keyup.enter.native="enterLogin()" >立即登录</el-button>
              </el-form-item>
            </el-form>



js片段:
//初始化回车事件
  created() {
    this.enterLogin();
  },


//这是定义的触发回车的事件 此函数必须初始化的时候执行一次此函数 否则回车事件不生效
    enterLogin(){
      document.onkeydown =(e) => {
        e = window.event || e;
        if(this.$route.path=='/login'&&(e.code=='Enter'||e.code=='enter')){
          //调用登录事件方法
          this.submitLogin('loginform');
        }
      }
    }

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