Prevent scrolling with keyboard arrows

Phaser 3
1

Hi, everybody.
In my game implemented control of the arrow keys.
The problem: browser scrolls the page using the same keyboard arrows.
How can I avoid this?
(already a heap of variants tried)

2

Answer myself, maybe someone will be useful. (please correct me if you know a better option)

Intercept pressing. Repeal the distribution. Create your event tied to the buttons “W,S,A,D”.

       window.onkeydown = function (e) {
		    switch (e.key) {
                case 'ArrowUp': {
                    const event = new KeyboardEvent("keydown", {
                        bubbles: true,
                        cancelable: true,
                        code: "KeyW"
                    });
                    document.getElementById('gameBody').dispatchEvent(event);
                    e.preventDefault();
                }break;
                case 'ArrowDown': {
                    const event = new KeyboardEvent("keydown", {
                        bubbles: true,
                        cancelable: true,
                        code: "KeyS"
                    });
                    document.getElementById('gameBody').dispatchEvent(event);
                    e.preventDefault();
                }break;
                case 'ArrowLeft': {
                    const event = new KeyboardEvent("keydown", {
                        bubbles: true,
                        cancelable: true,
                        code: "KeyA"
                    });
                    document.getElementById('gameBody').dispatchEvent(event);
                    e.preventDefault();
                }break;
                case 'ArrowRight': {
                    const event = new KeyboardEvent("keydown", {
                        bubbles: true,
                        cancelable: true,
                        code: "KeyD"
                    });
                    document.getElementById('gameBody').dispatchEvent(event);
                    e.preventDefault();
                }break;
            }
        }

P.S. Apologize. My English is still weak.