<el-select v-model.trim="param.dataType" placeholder="" @change="onType" > <el-option v-for="item in dictionaryTypeList" :key="item.value" :label="item.label" :value="item.value" /> </el-select> 中使用 onType () { this.param.dataValue = '' this.param.dataKey = '' },，再去选择的时候，两个值输入不进去，是为什么，代码怎么修改

可能是因为 `v-model.trim` 会将输入的值去除首尾空格，导致无法输入有效值。可以尝试将 `v-model` 改为 `:value` 和 `@input`，并在 `@input` 事件中手动去除空格：

<el-select
  :value="param.dataType"
  placeholder=""
  @input="onType"
>
  <el-option
    v-for="item in dictionaryTypeList"
    :key="item.value"
    :label="item.label"
    :value="item.value"
  />
</el-select>

...

onType(val) {
  this.param.dataType = val.trim();
  this.param.dataValue = '';
  this.param.dataKey = '';
},

这样应该就可以正常输入有效值了。

相关问题

<main-content :ifDetail="true"> <div class="two-side"> <div class="main-left"> <el-form :model="form" :rules="rules" ref="form" label-width="120px"> <el-form-item label="选择下载模块" prop="accountName"> <el-input v-model.trim="form.accountName" :maxlength="50"></el-input> </el-form-item> <el-form-item label="倾斜度"> <el-slider v-model.number="form.rotate" :min="-180" :max="180"></el-slider> </el-form-item> <el-form-item label="文字"> <el-input type="textarea" v-model="form.text"></el-input> </el-form-item> <el-form-item label="文字大小"> <el-input-number v-model.number="form.fontSize" :min="10" :max="50"></el-input-number> px </el-form-item> <el-form-item label="位置"> <el-select placeholder="请选择位置" v-model="form.alignment"> <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option> </el-select> </el-form-item> <el-form-item> <el-select v-if="form.alignment === 2" placeholder="请选择位置" v-model="form.textPosition"> <el-option v-for="item in textPositionOptions" :key="item.value" :label="item.label" :value="item.value" ></el-option> </el-select> </el-form-item> </el-form> {{ watermarkStyle }} </div> <div class="main-right" id="show"> <div class="watermark"> <span :style="watermarkStyle" ref="showText" style="word-break:break-all;display: inline-block">{{ form.text }}</span> </div> </div> </div> </main-content> 左边来控制右边div里水印展示，代码怎么写

您可以在 `<el-form>` 标签上绑定 `@input` 事件，当表单数据发生改变时，触发该事件，然后在事件处理函数中计算出水印的样式，并将样式绑定到 `<span>` 标签上。具体实现代码如下：

<template>
  <main-content :ifDetail="true">
    <div class="two-side">
      <div class="main-left">
        <el-form :model="form" :rules="rules" ref="form" label-width="120px" @input="handleInput">
          <!-- 表单项省略 -->
        </el-form>
      </div>
      <div class="main-right" id="show">
        <div class="watermark">
          <span :style="watermarkStyle" ref="showText" style="word-break:break-all;display: inline-block">{{ form.text }}</span>
        </div>
      </div>
    </div>
  </main-content>
</template>

<script>
export default {
  data() {
    return {
      form: {
        accountName: '',
        rotate: 0,
        text: '',
        fontSize: 16,
        alignment: 1,
        textPosition: 1
      },
      options: [
        { label: '左上', value: 1 },
        { label: '居中', value: 2 },
        { label: '右下', value: 3 }
      ],
      textPositionOptions: [
        { label: '正常', value: 1 },
        { label: '斜体', value: 2 }
      ]
    }
  },
  computed: {
    watermarkStyle() {
      const { rotate, fontSize, alignment, textPosition } = this.form
      const deg = rotate + (textPosition === 2 ? -45 : 0)
      const translateX =
        alignment === 1 ? '-10%' : alignment === 2 ? '-50%' : '90%'
      const translateY =
        alignment === 1 ? '-10%' : alignment === 2 ? '-50%' : '90%'
      const transform = `rotate(${deg}deg)`
      const style = {
        position: 'absolute',
        top: 0,
        left: 0,
        bottom: 0,
        right: 0,
        fontSize: `${fontSize}px`,
        transform: transform,
        '-webkit-transform': transform,
        '-ms-transform': transform,
        '-moz-transform': transform,
        '-o-transform': transform,
        opacity: '0.2',
        'pointer-events': 'none',
        'text-align': 'center',
        'z-index': 9999,
        transformOrigin: '50% 50%',
        '-webkit-transform-origin': '50% 50%',
        '-ms-transform-origin': '50% 50%',
        '-moz-transform-origin': '50% 50%',
        '-o-transform-origin': '50% 50%',
        color: '#000',
        'word-break': 'break-all',
        'white-space': 'pre-wrap',
        'max-height': '100%',
        'max-width': '100%',
        overflow: 'hidden',
        'text-overflow': 'ellipsis',
        '-webkit-text-fill-color': 'transparent',
        '-webkit-background-clip': 'text',
        'background-clip': 'text',
        '-webkit-user-select': 'none',
        '-moz-user-select': 'none',
        '-ms-user-select': 'none',
        userSelect: 'none',
        '-webkit-line-clamp': '1',
        display: 'flex',
        'align-items': 'center',
        'justify-content': 'center',
        'transform-style': 'preserve-3d'
      }
      if (textPosition === 2) {
        style.padding = '0.5rem'
        style.background =
          'linear-gradient(to right bottom, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.2) 45%, rgba(255, 255, 255, 0) 50%, rgba(255, 255, 255, 0.2) 55%, rgba(255, 255, 255, 0.2) 100%)'
      }
      style.transform += ` translate(${translateX}, ${translateY})`
      style['-webkit-transform'] += ` translate(${translateX}, ${translateY})`
      style['-moz-transform'] += ` translate(${translateX}, ${translateY})`
      style['-ms-transform'] += ` translate(${translateX}, ${translateY})`
      style['-o-transform'] += ` translate(${translateX}, ${translateY})`
      return style
    }
  },
  methods: {
    handleInput() {
      this.$nextTick(() => {
        const { width, height } = this.$refs.show.getBoundingClientRect()
        const { offsetWidth, offsetHeight } = this.$refs.showText
        if (width === 0 || height === 0 || offsetWidth === 0 || offsetHeight === 0) {
          return
        }
        const scaleX = width / offsetWidth
        const scaleY = height / offsetHeight
        const scale = Math.min(scaleX, scaleY)
        this.$refs.showText.style.transform += `scale(${scale})`
        this.$refs.showText.style['-webkit-transform'] += `scale(${scale})`
        this.$refs.showText.style['-moz-transform'] += `scale(${scale})`
        this.$refs.showText.style['-ms-transform'] += `scale(${scale})`
        this.$refs.showText.style['-o-transform'] += `scale(${scale})`
      })
    }
  }
}
</script>

代码中的 `watermarkStyle` 计算属性用于计算水印的样式，`handleInput` 方法用于在计算出水印样式后，将水印按照比例缩小并居中显示。注意，为了保证水印样式的正确性，需要在表单项加载完成之后计算水印样式，因此需要在 `handleInput` 方法中使用 `$nextTick` 方法等待表单项加载完成再进行计算。

<el-form-item label="联系人" prop="contactsList"> <el-button type="primary" link :disabled="dialogType === 'check'" @click="handleContactsInfo">添加</el-button> <el-table :data="infoForm.contactsList" border stripe size="small"> <el-table-column label="姓名" prop="ContactsName"> <template #default="{ row }"> <el-input :disabled="dialogType === 'check'" v-model.trim="row.ContactsName" maxlength="20" placeholder="请填写姓名" show-word-limit ></el-input> </template> </el-table-column> <el-table-column label="部门" prop="ContactsDepartment"> <template #default="{ row }"> <el-input :disabled="dialogType === 'check'" v-model.trim="row.ContactsDepartment" maxlength="20" show-word-limit placeholder="请填写部门" ></el-input> </template> </el-table-column> <el-table-column label="职务" prop="ContactsDuty"> <template #default="{ row }"> <el-input :disabled="dialogType === 'check'" v-model.trim="row.ContactsDuty" maxlength="20" show-word-limit placeholder="请填写职务" ></el-input> </template> </el-table-column> <el-table-column label="联系方式" prop="ContactNumber"> <template #default="{ row }"> <el-input :disabled="dialogType === 'check'" v-model.trim="row.ContactNumber" maxlength="50" show-word-limit placeholder="请填写联系方式" ></el-input> </template> </el-table-column> <el-table-column label="操作" width="56px"> <template #default="{ $index }"> <el-button type="primary" link size="small" :disabled="dialogType === 'check'" @click="handleRemove($index)" > 删除 </el-button> </template> </el-table-column> </el-table> </el-form-item> 该表单初始就有一个，且至少保留一个，对表单内姓名一栏进行必填校验

你可以通过在 el-input 元素的前面添加一个 el-form-item 元素，并设置 prop 属性为 "ContactsName"，然后在 el-input 元素中添加一个 :rules 属性来进行必填校验。以下是示例代码：

<el-table-column label="姓名" prop="ContactsName">
  <template #default="{ row }">
    <el-form-item prop="ContactsName" :rules="[{ required: true, message: '请填写姓名' }]">
      <el-input
        :disabled="dialogType === 'check'"
        v-model.trim="row.ContactsName"
        maxlength="20"
        placeholder="请填写姓名"
        show-word-limit
      ></el-input>
    </el-form-item>
  </template>
</el-table-column>

这样，当用户没有填写姓名时，表单会显示错误提示信息。