vue指令应用--实现输入框常见过滤功能

前端开发最常碰到的就是输入框,经常要做各种验证,本公司惯用的需求是直接屏蔽特定字符的输入,如禁止非数字输入,特殊符号输入,空格输入等,这些功能反复使用,做成指令的形式,直接调用,非常方便,上代码:

目录结构很简单:

  1、项目文件夹里新建directives文件夹,所有指令都放在这个文件夹里

  2、input-filter文件夹放具体指令,在其下建两个文件:

    a、inputFilter.js实现主体功能

    b、index.js负责封装,职责分明

inputFilter.js代码:

/**
 *  实现功能
 *  1、默认情况下只禁止空格输入
 *  2、限制只能输入整数
 *  3、限制只能输入整数和小数(价格类)
 *  4、限制只能输入手机号
 *  5、限制最大值和最小值(抛出错误给回调函数)
 */
const addListener = function(el, type, fn) {
  el.addEventListener(type, fn, false)
}
const spaceFilter = function(el) {
  addListener(el, 'keyup', () => {
    el.value = el.value.replace(/\s+/, '')
  })
}
const intFilter = function(el) {
  addListener(el, 'keyup', () => {
    el.value = el.value.replace(/\D/g, '')
  })
}
const priceFilter = function(el) {
  addListener(el, 'keyup', () => {
    el.value = el.value.replace(/[^\d.]*/g, '')
    if (isNaN(el.value)) {
      el.value = ''
    }
  })
}
const specialFilter = function(el) {
  addListener(el, 'keyup', () => {
    el.value = el.value.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g, '')
  })
}
const phoneFilter = function(el) {
  addListener(el, 'blur', () => {
    if (!el.value) {
      return
    }
    const phoneReg = new RegExp('^(13|14|15|16|17|18|19)[0-9]{9}$')
    if (!phoneReg.test(el.value)) {
      alert('手机号输入错误')
      el.value = ''
    }
  })
}
const urlFilter = function(el) {
  addListener(el, 'blur', () => {
    if (!el.value) {
      return
    }
    const urlReg = /(^#)|(^http(s*):\/\/[^\s]+\.[^\s]+)/
    if (!urlReg.test(el.value)) {
      alert('url输入错误')
      el.value = ''
    }
  })
}
export default {
  bind(el, binding) {
    if (el.tagName.toLowerCase() !== 'input') {
      el = el.getElementsByTagName('input')[0]
    }
    spaceFilter(el)
    switch (binding.arg) {
      case 'int':
        intFilter(el)
        break
      case 'price':
        priceFilter(el)
        break
      case 'special':
        specialFilter(el)
        break
      case 'phone':
        phoneFilter(el)
        break
      case 'url':
        urlFilter(el)
        break
      default:
        break
    }
  }
}

  

index.js代码:

import inputFilter from './inputFilter'

const install = function(Vue) {
  Vue.directive('inputFilter', inputFilter)
}

if (window.Vue) {
  window.inputFilter = inputFilter
  Vue.use(install)
}

inputFilter.install = install
export default inputFilter

  

组件引用:

import inputFilter from '@/directive/input-filter/index.js'  // 引入

<el-input v-input-filter v-model="inputSpaceFilter" placeholder="空格无法输入"></el-input>
<el-input v-input-filter:int v-model="inputIntFilter" placeholder="只能输入整数"></el-input>
<el-input v-input-filter:price v-model="inputPriceFilter" placeholder="只能输入价格"></el-input>
<el-input v-input-filter:special v-model="inputSpecialFilter" placeholder="过滤特殊字符"></el-input>
<el-input v-input-filter:phone v-model="inputPhoneFilter" placeholder="只能输入手机号"></el-input>
<el-input v-input-filter:url v-model="inputUrlFilter" placeholder="只能输入网址"></el-input>

  

效果图:

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转载自www.cnblogs.com/diantao/p/11009454.html
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