I want to display all the product which fulfilled a condition.
if(correctSize === 3 || correctSize === 4) {return key == "3kw" }
if(correctSize === 4 || correctSize === 5) {return key == "4kw"}
if(correctSize === 5 || correctSize === 6) {return key == "5kw" }
if(correctSize === 6 || correctSize === 7) {return key == "6kw" }
but the problem is that it return just one object (the first with return).
Try to create an array of results and push your answers inside. For example:
let results= [];
if(correctSize === 3 || correctSize === 4) results.push("3kw");
if(correctSize === 4 || correctSize === 5) results.push("4kw");
if(correctSize === 5 || correctSize === 6) results.push("5kw");
if(correctSize === 6 || correctSize === 7) results.push("6kw");
return results;