vue实现一个6个输入框的验证码输入组件
web前端开发
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·
2021-03-04 10:12
来源 | https://segmentfault.com/a/1190000023041401
1,限制输入数字
2,正常输入
3,backspace删除
4,paste任意位置粘贴输入
5,光标选中一个数字,滚轮可以微调数字大小,限制0-9
6,123|456 自动覆盖光标后输入的字符,此时光标在3后,继续输入111,会得到123111,而不用手动删除456
7,封装成vue单文件组件,方便任意调用。
模板代码
<template>
<div class="input-box">
<div class="input-content" @keydown="keydown" @keyup="keyup" @paste="paste" @mousewheel="mousewheel"
@input="inputEvent">
<input max="9" min="0" maxlength="1" data-index="0" v-model.trim.number="input[0]" type="number"
ref="firstinput"/>
<input max="9" min="0" maxlength="1" data-index="1" v-model.trim.number="input[1]" type="number"/>
<input max="9" min="0" maxlength="1" data-index="2" v-model.trim.number="input[2]" type="number"/>
<input
<input max="9" min="0" maxlength="1" data-index="4" v-model.trim.number="input[4]" type="number"/>
<input max="9" min="0" maxlength="1" data-index="5" v-model.trim.number="input[5]" type="number"/>
</div>
</div>
</template>
实现了键盘的keydown/keyup/paste/input和鼠标滚轮mousewheel事件
使用了6个输入框的方案来实现。
样式部分:使用了scss模式
scoped>
{
{
width: 512px;
height: 60px;
display: flex;
center; :
space-between; :
input {
color: inherit;
inherit; :
border: 0;
outline: 0;
1px solid #919191; :
height: 60px;
width: 60px;
44px; :
center; :
}
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
appearance: none;
margin: 0;
}
}
</style>
具体实现逻辑:主要实现以上几个键盘事件操作。
<script>
export default {
data() {
return {
// 存放粘贴进来的数字
pasteResult: [],
};
},
props: ['code'],
computed: {
input() {
// code 是父组件传进来的默认值,必须是6位长度的数组,这里就不再做容错判断处理
// 最后空数组是默认值
return this.code || this.pasteResult.length === 6 ? this.pasteResult : ['', '', '', '', '', '']
}
},
methods: {
// 解决一个输入框输入多个字符
inputEvent(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
this.$set(this.input, index, el.value.slice(0, 1))
},
keydown(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
if (e.key === 'Backspace') {
if (this.input[index].length > 0) {
this.$set(this.input, index, '')
} else {
if (el.previousElementSibling) {
el.previousElementSibling.focus()
this.$set(this.input, index - 1, '')
}
}
} else if (e.key === 'Delete') {
if (this.input[index].length > 0) {
this.$set(this.input, index, '')
} else {
if (el.nextElementSibling) {
this.$set(this.input, index = 1, '')
}
}
if (el.nextElementSibling) {
el.nextElementSibling.focus()
}
} else if (e.key === 'Home') {
el.parentElement.children[0] && el.parentElement.children[0].focus()
} else if (e.key === 'End') {
el.parentElement.children[this.input.length - 1] && el.parentElement.children[this.input.length - 1].focus()
} else if (e.key === 'ArrowLeft') {
if (el.previousElementSibling) {
el.previousElementSibling.focus()
}
} else if (e.key === 'ArrowRight') {
if (el.nextElementSibling) {
el.nextElementSibling.focus()
}
} else if (e.key === 'ArrowUp') {
if (this.input[index] * 1 < 9) {
this.$set(this.input, index, (this.input[index] * 1 + 1).toString());
}
} else if (e.key === 'ArrowDown') {
if (this.input[index] * 1 > 0) {
this.$set(this.input, index, (this.input[index] * 1 - 1).toString());
}
}
},
keyup(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
if (/Digit|Numpad/i.test(e.code)) {
this.$set(this.input, index, e.code.replace(/Digit|Numpad/i, ''));
el.nextElementSibling && el.nextElementSibling.focus();
if (index === 5) {
if (this.input.join('').length === 6) {
document.activeElement.blur();
this.$emit('complete', this.input);
}
}
} else {
if (this.input[index] === '') {
this.$set(this.input, index, '');
}
}
},
mousewheel(e) {
var index = e.target.dataset.index;
if (e.wheelDelta > 0) {
if (this.input[index] * 1 < 9) {
this.$set(this.input, index, (this.input[index] * 1 + 1).toString());
}
} else if (e.wheelDelta < 0) {
if (this.input[index] * 1 > 0) {
this.$set(this.input, index, (this.input[index] * 1 - 1).toString());
}
} else if (e.key === 'Enter') {
if (this.input.join('').length === 6) {
document.activeElement.blur();
this.$emit('complete', this.input);
}
}
},
paste(e) {
// 当进行粘贴时
e.clipboardData.items[0].getAsString(str => {
if (str.toString().length === 6) {
this.pasteResult = str.split('');
document.activeElement.blur();
this.$emit('complete', this.input);
}
})
}
},
mounted() {
// 等待dom渲染完成,在执行focus,否则无法获取到焦点
this.$nextTick(() => {
this.$refs.firstinput.focus()
})
},
}
</script>
如果你发现了bug,或者有优化空间,欢迎你的指正和建议。我会随时更新到原代码当中,分享给大家。
本文完~
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