纯前端vue实现登录的验证码
以前是把验证码地址和id存在后端redis中,每次请求失败或成功都作废一组键值对;对于我的小服务器为了节省资源,我觉得把验证码放在前端生成,进行生成验证(前端客户端调用js,大部分还是前端来提供性能支撑);
验证码组件 components/ValidCode.vue
<template>
<div
class="ValidCode disabled-select"
:style="`width:${width}; height:${height}`"
@click="refreshCode"
>
<span
v-for="(item, index) in codeList"
:key="index"
:style="getStyle(item)"
>{{ item.code }}</span>
</div>
</template>
<script>
// 验证码组件
export default {
name: 'ValidCode',
model: {
prop: 'value',
event: 'input'
},
props: {
width: {
type: String,
default: '100px'
},
height: {
type: String,
default: '40px'
},
length: {
type: Number,
default: 4
},
refresh: {
type: Number
}
},
data () {
return {
codeList: []
}
},
watch: {
refresh () {
this.createdCode()
}
},
mounted () {
this.createdCode()
},
methods: {
refreshCode () {
this.createdCode()
},
createdCode () {
const len = this.length
const codeList = []
const chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz0123456789'
const charsLen = chars.length
// 生成
for (let i = 0; i < len; i++) {
const rgb = [Math.round(Math.random() * 220), Math.round(Math.random() * 240), Math.round(Math.random() * 200)]
codeList.push({
code: chars.charAt(Math.floor(Math.random() * charsLen)),
color: `rgb(${rgb})`,
fontSize: `${10 + (+[Math.floor(Math.random() * 10)] + 6)}px`,
padding: `${[Math.floor(Math.random() * 10)]}px`,
transform: `rotate(${Math.floor(Math.random() * 90) - Math.floor(Math.random() * 90)}deg)`
})
}
// 指向
this.codeList = codeList
// 将当前数据派发出去
// console.log(codeList.map(item => item.code).join(''))
this.$emit('input', codeList.map(item => item.code).join(''))
},
getStyle (data) {
return `color: ${data.color}; font-size: ${data.fontSize}; padding: ${data.padding}; transform: ${data.transform}`
}
}
}
</script>
<style scoped>
.ValidCode{
display: flex;
justify-content: center;
align-items: center;
cursor: pointer;
}
.ValidCode span{
display: inline-block;
}
</style>
views/Login.vue中调用
import ValidCode from "@/components/ValidCode";
template调用组件:
<ValidCode @input="createValidCode" />
method方法:
// 接收验证码组件提交的 4位验证码
createValidCode(data) {
this.validCode = data
},
登录函数中验证验证码是否正确:统一转换为小写
if(this.form.validCode.toLowerCase() !== this.validCode.toLowerCase()) {
this.$message.error("验证码错误")
return
}