Use at least one of following - a semicolon to terminate expression or an explicit return keyword.

es6_semicolon_or_return.js

// In a function foo be careful when you have something like following:

// Doesn't Work - implicit return and no semicolon
    const myStr = "hello-world".split('-').join('_')
    `${myStr}/`

// Works
    const myStr = "hello-world".split('-').join('_');
    return `${myStr}/`;

// works
    const myStr = "hello-world".split('-').join('_');
    `${myStr}/`;

// works
    const myStr = "hello-world".split('-').join('_')
    return `${myStr}/`;