vue 自定义指令input 只能输入正整数
import Vue from 'vue'
// 针对 el-input做的限制，只能输入正整数
Vue.directive('Int', {
bind: function (el) {
const input = el.getElementsByTagName('input')[0]
input.onkeyup = function (e) {
if (input.value.length === 1) {
input.value = input.value.replace(/[^0-9]/g, '')
} else {
input.value = input.value.replace(/[^\d]/g, '')
}
trigger(input, 'input')
}
input.onblur = function (e) {
if (input.value.length === 1) {
input.value = input.value.replace(/[^0-9]/g, '')
} else {
input.value = input.value.replace(/[^\d]/g, '')
}
trigger(input, 'input')
}
}
})
const trigger = (el, type) => {
const e = document.createEvent('HTMLEvents')
e.initEvent(type, true, true)
el.dispatchEvent(e)
}