How to replace all occurrences of a character in a string in JavaScript?

The replace() method in JavaScript searches a string for a specified value or regular expression and returns a new string in which the specified values are replaced. However, if a string contains repeated words, the replace() method only changes the first occurrence of a string.
 

How to replace all occurrences of a character in a string in JavaScript?

str = "A B A C";
repStr = str.replace('A', 'X');
alert(repStr);

Output:

X B A C

When you run the above script, it will returns “X B A C”. Here you can see, the first occurrence “A” is replaced with “X” and the second is always the same. So how can you change all occurrences of a string in JavaScript?
 

 

Replace all occurrences using Split() and join()

You can replace all occurrences of a string using the Split() and join() functions.

str = "A B A C";
repStr = str.split("A").join("X");  
alert(repStr);

Output:

X B X C

 

Replace all occurrences using regular expression

You can replace all occurrences of a string using regular expressions.

str = "A B A C";
newStr =  replaceAll(str,'A','X');
alert(newStr);

function replaceAll(str, find, replace) {
    return str.replace(new RegExp(find, 'g'), replace);
}

Output:

X B X C

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