Explanation of search method of js regular expression

This article introduces the knowledge of "explaining the search method of js regular expressions". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Function: returns the location of the first substring that matches what the regular expression is looking for

Syntax: stringObj.search (rgExp) stringObj required rgExp regular expression

Return value: the search method indicates whether there is a corresponding match. If a match is found, the search method returns an integer value indicating the offset of the match from the beginning of the string. If no match is found, return-1

Sample code:

The copy code is as follows:

The / / search method indicates whether there is a corresponding match. If a match is found, the search method returns an integer value indicating the offset of the match from the beginning of the string. If no match is found, return-1

Var re=/ (/ d) (/ d) / d _ ram 2 _ r _ r / set regular expression

Var ostr= "11010111"; / / the string to be matched. The first position of the string starts at 0.

Var pos=ostr.search (re); / / perform string matching

If (pos==-1) {/ / if no match is found

[xss_clean] ("No match found")

}

Else {

Arr=ostr.match (re); / / match to find the matching content

[xss_clean] ("find the first match in" + pos+ ", and the match content is:")

[xss_clean] (arr [0]); / / output matching content

}

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