代码杂货区

目录

• 原生js获取scrollTop
• 获取字符数
• eval
• Object.prototype.toString.call(data['data'][objName]) === '[object Array]'
• .filter+.map获取有属性A的key数组
• js获取昨日、今日、本周、本月
• Object.assign(A, handle(B),handle(C))
• delete删除属性 delete(this.query['version'])
• A.hasOwnProperty('date')
• 没有更多了 s + this.oScroll.v > y - 100
• navigatorUserAgent
• parseURL

navigatorUserAgent

 navigatorUserAgent(isToPC=true){
    const ua = navigator.userAgent,
        isWindowsPhone = /(?:Windows Phone)/.test(ua),
        isSymbian = /(?:SymbianOS)/.test(ua) || isWindowsPhone,
        isAndroid = /(?:Android)/.test(ua),
        isFireFox = /(?:Firefox)/.test(ua),
        isChrome = /(?:Chrome|CriOS)/.test(ua),
        isTablet = /(?:iPad|PlayBook)/.test(ua) || (isAndroid && !/(?:Mobile)/.test(ua)) || (isFireFox && /(?:Tablet)/.test(ua)),
        isPhone = /(?:iPhone)/.test(ua) && !isTablet,
        isPc = !isPhone && !isAndroid && !isSymbian;
    console.log(ua)
    if(isToPC && isPc){
        window.location.href = 'https://www.XXXXX.com' +'/'+ window.location.href.split('m.XXXXX.com/')[1];
        return {}
    } else {
        // isTablet: isTablet,平板  // isPhone: isPhone, // isAndroid: isAndroid,// isAliApplet: ua.indexOf('AlipayClient') > -1,
        const oUa = {ua, isPc: isPc,}
        const isVx = window.__wxjs_environment === 'miniprogram'
        return Object.assign(oUa, {
            isVx: isVx, // 微信小程序
            isVxBrowser: !isVx && ua.toLowerCase().match(/MicroMessenger/i) == 'micromessenger'
        })
    }
},

parseURL

function parseURL(url) {
  const a = document.createElement('a')
  a.href = url
  let ret = {}, seg = a.search.replace(/^\?/, '').split('&')
  for (let i = 0; i < seg.length; i++) {
    if (!seg[i]) {
      continue
    }
    const s = seg[i].split('=')
    ret[s[0]] = s[1]
  }
  return ret
}

没有更多了

scrollBottom() {
  if (!this.oList.next || this.oList.loading) {
    return false
  }
  const s = document.documentElement.scrollTop || document.body.scrollTop
  const y = document.getElementById('_newsList').offsetHeight
  if (s + this.oScroll.v > y - 100) {
    this.$tools._debounce(this.getList, 500)
  }
},

.loadMore{
  .px(padding-bottom, 248);border:0 none;
  .px(font-size, @F24);text-align:center;
  color:@HC8C8C8;
}

scrollTop

const y = document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop;
注意: overflow:auto
[学习来源_原生js获取scrollTop](https://www.cnblogs.com/vali/p/8986535.html)

获取字符数

_getCharLen(str) {
    let len = 0
    for (let i = 0; i < str.length; i++) {
        str.charCodeAt(i) > 127 || str.charCodeAt(i) == 94 ? len += 2 : len++
    }
    return len
},

eval

try { eval(`data.${fieldNames eg:'data.data.data' }`) } catch (e) { }

[object Array]

Object.prototype.toString.call(data['data'][objName]) === '[object Array]'

.filter+.map获取有属性A的key数组

this.arrSortkey = this.array
    .filter(el => el.hasOwnProperty('sortable'))
    .map(el => el.sortkey)

$dateFormat日期转换

const $dateFormat={
  /**
   * 输出年月日 时:分:秒
   * 入参:
   *    oTime={date:非必填默认当天,day:非必填，默认距离当天0天}
   *    format非必填默认输出yyyy-MM-dd || yyyy-MM-dd hh:mm:ss
   *    this.$dateFormat.Dateformat({day:0,date:1575867705093})
   **/
  Dateformat(oTime, format='yyyy-MM-dd') {
    let time = oTime.date
      ? new Date(!(/^[1-9]\d*$/.test(oTime.date)) ? `${oTime.date}`.replace(/-/g, '/') : oTime.date)
      : new Date()
    oTime.day && time.setTime(time.getTime() + 3600 * 1000 * 24 * oTime.day)
    const date = {
      'M+': time.getMonth() + 1,
      'd+': time.getDate(),
      'h+': time.getHours(),
      'm+': time.getMinutes(),
      's+': time.getSeconds(),
      'q+': Math.floor((time.getMonth() + 3) / 3),
      'S+': time.getMilliseconds(),
    }

    if (/(y+)/i.test(format)) {
      format = format.replace(RegExp.$1, (time.getFullYear() + '').substr(4 - RegExp.$1.length))
    }
    for (let k in date) {
      if (new RegExp('(' + k + ')').test(format)) {
        format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? date[k] : ('00' + date[k]).substr(('' + date[k]).length))
      }
    }
    return format
  }
}

[学习来源_js获取昨日、今日、本周、本月](https://blog.csdn.net/smile_life_/article/details/80048447)

Object.assign

Object.assign(A, handle(B),handle(C))

delete删除属性

delete(this.query['version'])

hasOwnProperty

A.hasOwnProperty('date')