Question

How to replace the last occurrence of character in string with JavaScript

Answer 1

let str = 'javascript typescript node.js c';
 
const lastIndex = str.lastIndexOf('s');

const replace_char = 'W';

str = str.substring(0, lastIndex) + replace_char + str.substring(lastIndex + 1);
 
console.log(str); 
 
 
   
   
   
   
/*
run:
   
"javascript typescript node.jW c"
   
*/

 

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