1. function IsURL (str_url) {
  2.     var strRegex = '^((https|http|ftp|rtsp|mms)?://)'
  3.         + '?(([0-9a-z_!~*\'().&=+$%-]+: )?[0-9a-z_!~*\'().&=+$%-]+@)?' //ftp的user@ 
  4.         + '(([0-9]{1,3}.){3}[0-9]{1,3}' // IP形式的URL- 199.194.52.184 
  5.         + '|' // 允许IP和DOMAIN（域名） 
  6.         + '([0-9a-z_!~*\'()-]+.)*' // 域名- www. 
  7.         + '([0-9a-z][0-9a-z-]{0,61})?[0-9a-z].' // 二级域名 
  8.         + '[a-z]{2,6})' // first level domain- .com or .museum 
  9.         + '(:[0-9]{1,4})?' // 端口- :80 
  10.         + '((/?)|' // a slash isn't required if there is no file name 
  11.         + '(/[0-9a-z_!~*\'().;?:@&=+$,%#-]+)+/?)$';
  12.     var re=new RegExp(strRegex);
  13.     if (re.test(str_url)) {
  14.         return (true);
  15.     } else {
  16.         return (false);
  17.     }
  18. }
  1. function checkUrl(url){
  2.     if(url!=""){
  3.         var reg=/(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/;
  4.         if(!reg.test(url)){
  5.             alert("小可爱，网址不正确哦");
  6.         }
  7.     }
  8. }

ts类型覆盖

  1. # 创建一个辅助类型:
  3. type Overwrite<T, U> = Pick<T, Exclude<keyof T, keyof U>> & U;
  5. # 用法:
  6. type HexColorLine = Overwrite<Line, { color: number }>