1. 对于高 index 元素的隐藏 与 显示

• export const hideIndexEle = (cssStr)=>{
  
    const player = getElementsByCss(cssStr)[0]
  
    if(player){
  
      player.style.position = 'relative'
  
      player.style.top = '9999px'
  
      player.style.marginTop = '9999px'
  
    }
  
  }
  
  export const showIndexEle = (cssStr)=>{
  
    const player = getElementsByCss(cssStr)[0]
  
    if(player){
  
      player.style.marginTop = '0'
  
      player.style.top = '0'
  
    }
  
  }

2. 唯一字符串     （参考： https://blog.csdn.net/w405722907/article/details/74375266）

• export const kjfUUID = (len, radix)=>{
  
    let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
  
    let uuid = [], i;
  
    radix = radix || chars.length;
  
    if (len) {
  
      // Compact form
  
      for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
  
    } else {
  
      // rfc4122, version 4 form
  
      let r;
  
      // rfc4122 requires these characters
  
      uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
  
      uuid[14] = '4';
  
      // Fill in random data.  At i==19 set the high bits of clock sequence as
  
      // per rfc4122, sec. 4.1.5
  
      for (i = 0; i < 36; i++) {
  
        if (!uuid[i]) {
  
          r = 0 | Math.random()*16;
  
          uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r];
  
        }
  
      }
  
    }
  
    return uuid.join('');
  
  }

3. 对身份证的月日进行 脱敏

• export const kjfSafeId = (idStr)=>{
  
    let charArr = idStr.split("")
  
    let result = charArr.reduce((arr, next, index)=>{
  
      (index>9&&index<14)?arr.push("*"):arr.push(next)
  
      return arr
  
    }, [])
  
    return result.join("")
  
  }