Basta ya de indagar por todo internet ya que estás al lugar necesario, contamos con la solución que quieres hallar pero sin problema.
Ejemplo 1: reemplazo de JavaScript string
var str="JavaScript replace method test";
var res =str.replace("test","success");//res = Javscript replace method success
Ejemplo 2: reemplazo de JavaScript
var res =str.replace("find","replace");
Ejemplo 3: js reemplaza caracteres en un string
var str="Original string!";
var str=str.replace("Original","New");
Ejemplo 4: javascript reemplaza todas las apariciones de string
function replaceAll(str, find, replace)
var escapedFind=find.replace(/([.*+?^=!:$()//usage example
var sentence="How many shots did Bill take last night? That Bill is so crazy!";
var blameSusan=replaceAll(sentence,"Bill","Susan");
Ejemplo 5: javascript string reemplazar
const p ='Its going to rain today and its going to rain tomorrow';// Example of replacing all occurrances
// g =global search, which searches all instances
// i = case insensitive, which will match 'a'with'A'
const regex =/rain/gi;
console.log(p.replace(regex,'snow'));// expected output:"Its going to snow today and its going to snow tomorrow"// Example of replacing the first occurance
console.log(p.replace('rain','snow'));// expected output:"Its going to snow today and its going to rain tomorrow"
Ejemplo 6: reemplazar en string javascript
const p ='hello world ! hello everyone ! ';
const regex =/hello/gi;
console.log(p.replace(regex,'good morning'));// expected output:"good morning world ! good morning everyone !"
console.log(p.replace('hello','good evening'));// expected output:"good evening world ! hello everyone !"
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