js 原生： 身份证脱敏、唯一随机字符串uuid、对于高 index 元素的隐藏与显示

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("")
  }