限制el-input只能输入0或1
时间: 2024-09-11 09:07:39 浏览: 66
要实现在VUE的Element UI组件`<el-input>`中只允许用户输入数字0或1,你可以使用自定义指令或者在`v-model`绑定的值上做校验。这里提供两种方法:
**方法一:使用自定义指令**
首先创建一个名为`input-type-validator.js`的文件,添加一个自定义指令`only-zero-or-one`:
```javascript
export default {
bind(el, binding, vnode) {
el.addEventListener('input', function(e) {
const value = e.target.value;
if (value !== '0' && value !== '1') {
e.target.value = value === '' ? '' : '0'; // 清空输入或保留0
}
});
},
unbind(el, binding, vnode) {
el.removeEventListener('input', arguments.callee);
}
};
```
然后在模板中使用这个指令:
```html
<el-input v only-zero-or-one></el-input>
```
**方法二:在模板中直接处理**
如果你不想使用指令,可以在`v-model`绑定的地方做实时校验:
```html
<template>
<el-input v-model="inputValue" @input="checkInput"></el-input>
</template>
<script>
export default {
data() {
return { inputValue: '' };
},
methods: {
checkInput(value) {
this.inputValue = value.trim().replace(/[^01]/g, '');
}
}
}
</script>
```
在这个例子中,当用户输入非0或1的字符时,会被清空。
阅读全文
相关推荐


















