string substitution javascript code example

Example 1: javascript replace

var res = str.replace("find", "replace");

Example 2: javascript replace all occurrences of string

function replaceAll(str, find, replace) {
    var escapedFind=find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
    return str.replace(new RegExp(escapedFind, 'g'), replace);
}
//usage example
var sentence="How many shots did Bill take last night? That Bill is so crazy!";
var blameSusan=replaceAll(sentence,"Bill","Susan");

Example 3: javascript string interpolation

var animal = "cow";
var str=`The ${animal} jumped over the moon`; // string interpolation

Example 4: how to use the replace method in javascript

let string = 'soandso, my name is soandso';

let replaced = string.replace(/soandso/gi, 'Dylan');

console.log(replaced); //Dylan, my name is Dylan

Example 5: javascript template literals

//Must use backticks, `, in order to work.

let a = 5;
let b = 10;
console.log(`Fifteen is ${a + b} and
not ${2 * a + b}.`);

//Output:
//Fifteen is 15 and not 20.