<template> <el-input v-model="inputValue" :oninput="handleInput" :maxlength="5" :validate-event="false" /></template><script>export default { data() { return { inputValue: '' } }, methods: { handleInput() { let value = this.inputValue.replace(/\D/g, '') // 只保留数字 if (value.length > 5) { this.$message.warning('长度不能超过5位') this.inputValue = value.substr(0, 5) // 截取前5位 } else { this.inputValue = value } } }}</script>无效
时间: 2024-02-20 09:57:19 浏览: 60
根据你提供的代码,我发现你使用了 Vue.js 框架,但是在绑定 :oninput 事件时,语法不正确。应该使用 v-on 指令来绑定事件,如下所示:
```
<template>
<el-input v-model="inputValue" v-on:input="handleInput" :maxlength="5" :validate-event="false" />
</template>
<script>
export default {
data() {
return {
inputValue: ''
}
},
methods: {
handleInput() {
let value = this.inputValue.replace(/\D/g, '') // 只保留数字
if (value.length > 5) {
this.$message.warning('长度不能超过5位')
this.inputValue = value.substr(0, 5) // 截取前5位
} else {
this.inputValue = value
}
}
}
}
</script>
```
在上述代码中,使用了 v-on:input 指令来绑定输入框的 input 事件,同时在 handleInput 方法中对输入框的内容进行了处理。
希望这个回答能够对你有所帮助。如果你还有其他问题,欢迎继续提问。
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:
```html
<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。
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