js过滤特殊的字符串，例如：😊

deepFilter.js

/**
 * 过滤特殊的字符
 * @param {any} 需要被过滤掉字符串
 * @returns 过滤后的结果
 */
function deepFilter(src) {
  let dst, prop;
  let type = Object.prototype.toString.call(src);
  if (type === '[object Array]') {
    dst = [];
  } else if (type === '[object Object]') {
    dst = {};
  } else if (type === '[object String]') {
    return src.replace(/([\ud800-\udbff][\u0000-\uffff])/g, '');
  } else {
    return src;
  }
  for (prop in src) {
    if (src.hasOwnProperty(prop)) {
      dst[prop] = deepFilter(src[prop]);
    }
  }
  return dst;
}