前端记录输入框的历史输入记录实现步骤(输入框数据记忆功能)

<template>
  <el-form :model="form">
    <el-form-item label="用户名">
      <el-input 
        v-model="form.username" 
        :autocomplete="getAutocompleteOptions('username')"
        @input="updateHistory('username', $event)"
      ></el-input>
    </el-form-item>
    <el-form-item label="邮箱">
      <el-input 
        v-model="form.email" 
        :autocomplete="getAutocompleteOptions('email')"
        @input="updateHistory('email', $event)"
      ></el-input>
    </el-form-item>
    <!-- 其他字段 -->
    <el-form-item label="电话号码">
      <el-input 
        v-model="form.phoneNumber" 
        :autocomplete="getAutocompleteOptions('phoneNumber')"
        @input="updateHistory('phoneNumber', $event)"
      ></el-input>
    </el-form-item>
    <!-- 更多字段... -->
  </el-form>
</template>

<script>
export default {
  data() {
    return {
      form: {
        username: '',
        email: '',
        phoneNumber: '',
        // 其他字段...
      },
      history: {
        username: [],
        email: [],
        phoneNumber: [],
        // 其他字段...
      }
    };
  },
  created() {
    // 页面创建时，从 localStorage 中恢复历史记录
    this.restoreHistory();
  },
  methods: {
    restoreHistory() {
      const savedHistory = localStorage.getItem('history');
      if (savedHistory) {
        this.history = JSON.parse(savedHistory);
      }
    },
    updateHistory(field, value) {
      if (!this.history[field].includes(value)) {
        this.history[field].push(value);
        this.saveHistory();
      }
    },
    saveHistory() {
      // 将历史记录保存到 localStorage
      localStorage.setItem('history', JSON.stringify(this.history));
    },
    getAutocompleteOptions(field) {
      // 返回历史记录作为 autocomplete 选项
      return this.history[field].join(',');
    }
  }
};
</script>