?> 根据正则表达式,设计自定义处理表单输入规则的指令,下面以禁止输入表情和特殊字符为例
let findEle = (parent, type) => {
return parent.tagName.toLowerCase() === type ? parent : parent.querySelector(type)
}
const trigger = (el, type) => {
const e = document.createEvent('HTMLEvents')
e.initEvent(type, true, true)
el.dispatchEvent(e)
}
const emoji = {
bind: function (el, binding, vnode) {
// 正则规则可根据需求自定义
var regRule = /[^u4E00-u9FA5|d|a-zA-Z|rns,.?!,。?!…—&$=()-+/*{}[]]|s/g
let $inp = findEle(el, 'input')
el.$inp = $inp
$inp.handle = function () {
let val = $inp.value
$inp.value = val.replace(regRule, '')
trigger($inp, 'input')
}
$inp.addEventListener('keyup', $inp.handle)
},
unbind: function (el) {
el.$inp.removeEventListener('keyup', el.$inp.handle)
},
}
export default emoji
<template>
<input type="text" v-model="note" v-emoji />
</template>