mix-ui/libs/function/mask.js

mix-ui，对于uView UI的补充和组合，用于uni-app生态的UI框架

/**
 * 关键信息隐藏
 * @param str 字符串
 * @param beginLen 字符串前面保留位数
 * @param endLen 字符串后面保留位数
 * @param mask * 掩码
 * @returns {string}
 */
function mask(str = '', beginLen = 2, endLen = 2, maskCode = '*') {
  beginLen = Math.abs(beginLen)
  endLen = Math.abs(endLen)
  var len = str.length
  if (len <= beginLen + endLen) {
    endLen = 0
    if (len <= beginLen) {
      beginLen = len - 1
    } else if (len == 1) {
      beginLen = 1
    }
  }

  len = len - (beginLen + endLen)

  var maskStr = ''
  for (var i = 0; i < len; i++) {
    maskStr += maskCode
  }
  return str.substring(0, beginLen) + maskStr + str.substring(str.length - endLen)
}

export default mask