Replacing string in JavaScript examples

Regular expression Replace string example

JavaScript code for replacing using the regular expression:


function replaceWithRegex(){
	var replaced = str.replace(/abc/g, "JavaScript");
	alert(replaced);
}

Regular express case sensitive replace

Regular express is used for performing case sensitive replace in a string.


var dog = "I love dog. Dog is faithful animal.";
function replaceWithRegexCaseSensitive(){
	var replaced = dog.replace(/dog/g, "cat");
	alert(replaced);
}

Regular express case in-sensitive replace

Regular express is used for performing case in-sensitive replace in a string.


var str2 = "I love dog. Dog found in abundant around the world.";
function replaceWithRegexCaseInSensitive(){
	var searchString = "dog";
	var regEx = new RegExp(searchString, "ig");
	var replacementString = "cat";
	var replaced = str2.replace(regEx, replacementString);
	alert(replaced);
}

Replace with split and join

In JavaScript split() and join() functions can be used for replacting all string.


var dog = "I love dog. Dog is faithful animal.";
function replaceWithSplitAndJoin(){
	var splitted = dog.split("dog");
	var replaced = splitted.join("cat");
	alert(replaced);
}