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JavaScript String match() Method

Last Updated : 05 Mar, 2024
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The JavaScript String match() method searches a string for a specified pattern using regular expressions. It returns an array of all matches found, or null if no matches are found.

String match() Method Syntax

string.match(regExp);

String match() Method Parameters

  • string: The string to be searched.
  • regexp: A regular expression object or a regular expression pattern string to be searched for within the string.

Note: If the g flag is not used with the regular expression, only the first match will be returned. If the g flag is used, all matches will be returned.

String match() Method Return Value

Returns an array that contains the matches and one item for each match or if the match is not found then it will return Null. 

String match() Method Examples

Example 1: Using /g flag

Here, the substring “eek” will match with the given string, and when a match is found, it will return an array of string objects. Here “g” flag indicates that the regular expression should be tested against all possible matches in a string. 

javascript




// Initializing function to demonstrate match()
// method with "g" para
function matchString() {
    let string = "Welcome to geeks for geeks";
    let result = string.match(/eek/g);
    console.log("Output : " + result);
} matchString();
 






                        










Output


Output : eek,eek








Example 2: Using /i flag 


Here, the substring “eek” will match with the given string, and it will return instantly if it found the match. Here “i” parameter helps to find the case-insensitive match in the given string. 




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// Initializing function to demonstrate match()


// method with "i" para


function matchString() {


    let string = "Welcome to GEEKS for geeks!";


    let result = string.match(/eek/i);


    console.log("Output : " + result);


} matchString();



















                        







                        










Output


Output : EEK








Example 3: Using /gi flag


Here, the substring “eek” will match with the given string, and it will return instantly if it found the match. Here “gi” parameter helps to find the case-insensitive match AND all possible combinations in the given string. 




javascript














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















// Initializing function to demonstrate match()


// method with "gi" para


function matchString() {


    let string = "Welcome to GEEKS for geeks!";


    let result = string.match(/eek/gi);


    console.log("Output : " + result);


} matchString();



















                        







                        










Output


Output : EEK,eek








We have a complete list of Javascript string methods, to check those please go through this Javascript String Complete reference article.


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                                                    kundankumarjha                                                

                                            

                                            

            
                                        

                                        

                                            
    

        
        
    
                                            

                                                
                                                
                                            

                                            

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