js get the url page id, that is, the last numeric file name

The first method: regular matching

<script>
var strUrl = "///article/";
url = (/\/(\d*)\.(html|htm|shtm|shtml)/);
(url[1]);
</script>

Replenish

var re = new RegExp(".*/(\\d+)\\.html","ig");
 var _aid = "-1";
 if(("https:///article/pc/") != null){
   _aid = RegExp.$1
  }

Practical application code

<script>
var strUrl = ;
url = (/\/(\d*)\.(html|htm|shtm|shtml)/);
(url[1]);
</script>

The second method: directly split the page into an array of arrays

<script>
var strUrl = ;
var arrUrl=("/");
var strPage=arrUrl[-1];
alert((".html","").replace(".htm",""));
</script>

The third method: use substring

<script>
var strUrl = ;
str=(("/") + 1)
alert((".html","").replace(".htm",""));
</script>

Substring definition and usage

The substring() method is used to extract characters in a string between two specified subscripts.

grammar

(start,stop)

parameter	describe
start	Required. A non-negative integer that specifies the position of the first character of the substring to be extracted in stringObject.
stop	Optional. A non-negative integer has 1 more position in stringObject than the last character of the substring to be extracted. If this parameter is omitted, the returned substring will continue to the end of the string.

parameter

describe

start

Required. A non-negative integer that specifies the position of the first character of the substring to be extracted in stringObject.

stop

Optional. A non-negative integer has 1 more position in stringObject than the last character of the substring to be extracted.

If this parameter is omitted, the returned substring will continue to the end of the string.

Return value

A new string whose value contains a substring of stringObject whose content is all characters from start to stop-1, with a length of stop minus start.

illustrate

The substring() method returns a substring includes the characters at start, but does not include the characters at stop.

If the parameter start is equal to stop, then the method returns an empty string (that is, a string of length 0). If start is larger than stop, the method will swap these two parameters before extracting the substring.

The fourth type: for abnormal parameters on the page

For example ///article/?path=/asdf/ddd

&lt;script&gt;
var strUrl = "http:///article/";
//Get the current page name//var strUrl=;
var arrUrl=("/");
var strPage=arrUrl[-1];
if(("?")&gt;-1){
  var pageName=("?");
  strPage=pageName[0];
}
alert(("html","").replace(".htm",""));
&lt;/script&gt;

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