<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="./js/vue.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div id="demo">
<input type="text" placeholder="只能输入正整数" @input="change" @change="change" :value="inpNum" />
</div>
<script type="text/javascript">
new Vue({
el: '#demo',
data: {
oldNum: ''
},
computed: {
inpNum() {
return this.oldNum
}
},
methods: {
change(event) {
let val = event.target.value.trim()
// 只能是正整数或空,可根据需求修改正则
//item = e.target.value.replace(/[^\d]/g,'')
if(/^[1-9]\d*$|^$/.test(val)) {
this.oldNum = val
} else {
event.target.value = this.oldNum
}
}
}
})
</script>
</body>
</html>
复制代码
Vue只能输入数字
<!DOCTYPE html><html><head><meta charset="UTF-8"><title></title><script src="./js/vue.js"
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