Vue.js 中的实用工具方法

收集日常开发中常用到的一些工具方法, 包含 vue 的公用过滤器、公用指令等 (PS: 懒人养成记)

公用自定义过滤器

import Vue from 'vue'
import moment from 'moment'


Vue.filter('dateFormat', (value, formatStr) => {
 return moment(value).format(formatStr || 'YYYY年MM月DD日 hh:mm:ss')
})


Vue.filter('digitUppercase', (value) => {
 if (Number(value)) {
 let fraction = ['角', '分']
 let digit = [
  '零', '壹', '贰', '叁', '肆',
  '伍', '陆', '柒', '捌', '玖'
 ]
 let unit = [
  ['元', '万', '亿'],
  ['', '拾', '佰', '仟']
 ]

 let head = value < 0 ? '欠' : ''
 value = Math.abs(value)
 let s = ''
 for (let i = 0; i < fraction.length; i++) {
  s += (digit[Math.floor(value * 10 * Math.pow(10, i)) % 10] + fraction[i]).replace(/零./, '')
 }
 s = s || '整'
 value = Math.floor(value)
 for (let i = 0; i < unit[0].length && value > 0; i++) {
  let p = ''
  for (let j = 0; j < unit[1].length && value > 0; j++) {
  p = digit[value % 10] + unit[1][j] + p
  value = Math.floor(value / 10)
  }
  s = p.replace(/(零.)*零$/, '').replace(/^$/, '零') + unit[0][i] + s
 }
 return head + s.replace(/(零.)*零元/, '元')
  .replace(/(零.)+/g, '零')
  .replace(/^整$/, '零元整')
 } else {
 return '零元整'
 }
})

公用自定义指令

import Vue from 'vue'

Vue.directive('preventReplaceClick', {
 inserted (el, binding) {
 el.addEventListener('click', () => {
  if (!el.disabled) {
  el.classList.add('is-disabled')
  const i = document.createElement('i')
  i.classList.add('el-icon-loading')
  el.prepend(i)
  el.classList.add('is-loading')
  el.disabled = true
  setTimeout(() => {
   el.disabled = false
   el.classList.remove('is-disabled')
   el.classList.remove('is-loading')
   el.removeChild(i)
  }, binding.value || 1000)
  }
 })
 }
})

实用方法

节流和防抖

// 防抖
export function debounce (fn, delay = 200) {
 let timer
 return function () {
 let th = this
 let args = arguments
 if (timer) {
  clearTimeout(timer)
 }
 timer = setTimeout(function () {
  timer = null
  fn.apply(th, args)
 }, delay)
 }
}
// 节流
export function throttle (fn, interval = 200) {
 let last
 let timer
 return function () {
 let th = this
 let args = arguments
 let now = +new Date()
 if (last && now - last < interval) {
  clearTimeout(timer)
  timer = setTimeout(function () {
  last = now
  fn.apply(th, args)
  }, interval)
 } else {
  last = now
  fn.apply(th, args)
 }
 }
}

时间格式化处理

```javascript
// 格式化 startDate 和 endDate
import moment from ‘moment'
import _ from ‘lodash'

export function timerByAdd ({
num,
timer = ‘days'
} = {}, formatStr = ‘YYYY-MM-DD') {
let startDate
let endDate = moment().format(formatStr)
num ? startDate = moment().add(num, timer).format(formatStr) : startDate = endDate
let result = {
startDate,
endDate
}
return result
}

export function timerBySubtract ({
num,
timer = ‘days'
} = {}, formatStr = ‘YYYY-MM-DD') {
let startDate
let endDate = moment().format(formatStr)
num ? startDate = moment().subtract(num, timer).format(formatStr) : startDate = endDate
let result = {
startDate,
endDate
}
return result
}
 
export function timerFormat (timer) { 
if (
.isObject(timer)) {
return
.values(timer) 
} 
} 

总结

以上所述是小编给大家介绍的Vue.js 中的实用工具方法,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！
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