If you want to type an array, you can do that in Typescript. let x:number[] = []; x.push("x"); Here, the transpiler will catch the error of trying to push a s

If you want to type an array, you can do that in Typescript. let x:number[] = []; x.push("x"); Here, the transpiler will catch the error of trying to push a string to a number array. Typing is your friend, and it will in almost all cases help you write cleaner and safer code.