Element组件库中各组件的细节知识记录

1. el-input的change、input事件中传递额外参数

<el-input v-model="name" @change="val=>onChange(val, xxx)"></el-input>
<el-input v-model="name" @change="onChange($event, xxx)"></el-input>

2. 禁用当前日期之前的日期（只能选择今日到今日之后）

<el-date-picker
  type="date"
  placeholder="请选择时间"
  :picker-options="pickerOptions"
></el-date-picker>
 
pickerOptions: {
    // 限制预约时间
    disabledDate(time) {
      return time.getTime() < Date.now() - 24 * 60 * 60 * 1000
    }
 },

3. el-pagination纯前端分页

<el-table :data="failureData.slice((pageNumber - 1) * pageSize, pageNumber * pageSize)">
</el-table>
<el-pagination
    layout="prev, pager, next"
    :page-size="pageSize"
    :current-page="pageNumber"
    :total="failureData.length"
    @current-change="handleCurrentChange"
>
</el-pagination>

handleCurrentChange(val) {
    this.pageNumber = val
},

4.给el-table加序号

<el-table-column label="序号" type="index" align="center" width="67">
    <template slot-scope="scope">
        <span>{{(pageNumber - 1) * pageSize + scope.$index + 1}</span>
    </template>
 </el-table-column>

5.el-form必填校验

循环校验

<template>
  <el-form :model="form" :rules="rules" ref="form" label-width="120px" class="demo-ruleForm">
    <el-form-item label="名称" prop="name">
      <el-input v-model="form.name" placeholder="填写名称"></el-input>
    </el-form-item>
    <!--循环体-->
    <template v-for="(item, index) in form.list">
      <el-form-item label="类型" :prop="`list.${index}.type`" :rules="rules.type">
        <el-input v-model="item.type" placeholder="填写类型"></el-input>
      </el-form-item>
      <el-form-item label="版本" :prop="`list.${index}.version`" :rules="rules.version">
        <el-select style="width: 100%" v-model="item.version" placeholder="选择版本">
          <el-option v-for="(item, index) in versionList" :key="index" :label="item" :value="item"></el-option>
        </el-select>
      </el-form-item>
    </template>
  </el-form>
</template>

<script>
export default {
  data() {
    return {
      versionList: [],
      form: {
        name: '',
        list: [
          {
            type: '',
            version: ''
          },
          {
            type: '0',
            version: ''
          },
          {
            type: '1',
            version: ''
          }
        ]
      },
      rules: {
        type: [{
          required: true, message: '请填写类型', trigger: 'change'
        }

        ],
        version: [{
          required: true, message: '请填选择版本', trigger: 'change'
        }

        ]
      }
    }
  }
}
</script>

多层嵌套

<template>
  <el-form :model="form" :rules="rules" ref="form" label-width="120px" class="demo-ruleForm">
    <el-form-item label="名称" prop="stamp.reason">
      <el-input v-model="form.stamp.reason"></el-input>
    </el-form-item>
  </el-form>
</template>
  
  <script>
  export default {
    data() {
      return {
        form: {
            stamp: {
                 reason: ''
            }
        },
        rules: {
            //第一种方式
            stamp: {
                reason: [
                    { required: true, message: '请填写盖章原因', trigger: 'change' },
                    { max: 2000, message: '最多只能输入2000个字', trigger: 'change' }
                ]
            },
            //第二种方式
            'stamp.reason': [
                { required: true, message: '请填写盖章原因', trigger: 'change' },
                { max: 2000, message: '最多只能输入2000个字', trigger: 'change' }
            ]
        }
      }
    }
  }
  </script>

6.删除表格某一行

let index = this.form.model_condition_list.findIndex(d => d.row_id == row.row_id)
console.log('slicehandleDelete', index)
this.form.model_condition_list.splice(index, 1)

7.Vue实例重新渲染

this.$forceUpdate()

8.动态给 el-input 修改颜色

<el-input :style="{'--inputColor' : colorVal}"></el-input>

data() {
    return {
        colorVal: 'red' // 可以去动态赋值颜色
    }
}

<style lang="scss" scoped>
  ::v-deep .el-input__inner{
    color: var(--inputColor); // 声明一个变量
  }
</style>