Substitua o espaço por hífen/javascript
const str = "Sonic Free Games";
str = str.replace(/\s+/g, '-').toLowerCase();
console.log(str); // "sonic-free-games"
Gleaming Goat
const str = "Sonic Free Games";
str = str.replace(/\s+/g, '-').toLowerCase();
console.log(str); // "sonic-free-games"
let str = "This-is-a-news-item-";
str = str.replace(/-/g, ' ');
alert(str); //This is a news item