How to add points to classes?

Question

JavaScript

There is a line: I tried it like this: You need it like this:const str = 'class1 class2';
const newstr = str.replace(/^[^\d]/g, .$1);

'.class1 .class2'

Answer 1

Does anyone know or is the question too stupid and poorly formulated?

Answer 2

const newstr = str.split(" ").map(cls => '.${cls}').join(" ");

'.${cls}' here, replace with brackets for string interpolation