javascript
import { directive } from 'vue'
const noDecimal = {
mounted(el) {
el.addEventListener('keypress', (e) => {
if (e.key === '.') {
e.preventDefault()
}
})
}
}
// 使用自定义指令
directive('no-decimal', noDecimal)
- 使用 标签上添加
v-no-decimal
javascript
<el-input type="text" v-model="value" v-no-decimal placeholder="请输入..." > </el-input>
v3 指令生命周期
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v2指令生命周期 官网
vue2中mounted
替换成bind
javascript
directives: {
'no-decimal': {
bind: (el) => {
el.addEventListener('keypress', (event) => {
if (event.key === '.') {
event.preventDefault()
}
})
}
}
},
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