Does javascript have a method to replace part of a string without creating a new string?

Question

var str = \"This is a string\";
var thing = str.replace(\"string\",\"thing\");

console.log( str )
>> \"This is a string\" 

console.log( thing )
>> \"Th         


        

Answer 1

As Cristian Sanchez mentioned, in javascript strings are immutable. Depending on the task we can try to work around with the following approaches:

 // **fastest** .split(...).join(...)
var string = 'My string'
string = string.split('string').join('thing')
   console.info('with .split-.join', { string }) // 'My thing'

// **good old wine** .replace('...','...') as mentioned above
string = 'My string'
string = string.replace('string','thing')
   console.info('with .replace', { string }) // 'My thing'

// **ES6 string interpolation**
string = (arg) => `My ${arg}`
   console.info('with interpolation 1', { string: string('string') }) // 'My string'
   console.info('with interpolation 2', { string: string('thing') }) // 'My thing'

Note: there are fancy ways with such approaches as ..indexOf(...) and .substring(...), .charAt(...),