node.js string.replace doesn't work?

Question

var variableABC = \"A B C\"; 
variableABC.replace(\'B\', \'D\') //wanted output: \'A D C\'

but \'variableABC\' didn\'t change :

Answer 1

Isn't string.replace returning a value, rather than modifying the source string?

So if you wanted to modify variableABC, you'd need to do this:

var variableABC = "A B C";

variableABC = variableABC.replace('B', 'D') //output: 'A D C'