js实现贪吃蛇游戏

<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>贪吃蛇游戏</title><style

YH丶浩

406人浏览 · 2023-09-12 11:31:07

YH丶浩 · 2023-09-12 11:31:07 发布

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>贪吃蛇游戏</title>
    <style>
        .game-container {
            width: 300px;
            height: 300px;
            border: 1px solid #000;
            position: relative;
        }

        .snake {
            width: 20px;
            height: 20px;
            background-color: green;
            position: absolute;
        }

        .food {
            width: 20px;
            height: 20px;
            background-color: red;
            position: absolute;
        }

        button {
            display: block;
            margin-top: 10px;
        }
    </style>
</head>

<body>
    <div class="game-container">
        <div class="snake" id="snake"></div>
        <div class="food" id="food"></div>
    </div>
    <button id="start">开始游戏</button>
    <script>
        const gameContainer = document.querySelector(".game-container");
        const snakeElement = document.getElementById("snake");
        const foodElement = document.getElementById("food");
        const startButton = document.getElementById("start");

        let snake = [{ x: 10, y: 10 }];
        let food = { x: 5, y: 5 };
        let direction = "right";
        let isGameRunning = false;

        function moveSnake() {
            if (!isGameRunning) return;

            const head = { ...snake[0] };
            switch (direction) {
                case "up":
                    head.y--;
                    break;
                case "down":
                    head.y++;
                    break;
                case "left":
                    head.x--;
                    break;
                case "right":
                    head.x++;
                    break;
            }

            snake.unshift(head);

            if (head.x === food.x && head.y === food.y) {
                // 吃到食物
                food = {
                    x: Math.floor(Math.random() * 15),
                    y: Math.floor(Math.random() * 15),
                };
            } else {
                snake.pop();
            }

            // 检查碰撞
            if (
                head.x < 0 ||
                head.x >= 15 ||
                head.y < 0 ||
                head.y >= 15 ||
                snake.some((segment, index) => index !== 0 && segment.x === head.x && segment.y === head.y)
            ) {
                isGameRunning = false;
                alert("游戏结束！");
                return;
            }

            updateGameBoard();
            setTimeout(moveSnake, 200);
        }

        function updateGameBoard() {
            snakeElement.innerHTML = "";
            snake.forEach((segment) => {
                const segmentElement = document.createElement("div");
                segmentElement.className = "snake";
                segmentElement.style.left = segment.x * 20 + "px";
                segmentElement.style.top = segment.y * 20 + "px";
                snakeElement.appendChild(segmentElement);
            });

            foodElement.style.left = food.x * 20 + "px";
            foodElement.style.top = food.y * 20 + "px";
        }

        startButton.addEventListener("click", () => {
            if (!isGameRunning) {
                snake = [{ x: 10, y: 10 }];
                direction = "right";
                isGameRunning = true;
                moveSnake();
            }
        });

        document.addEventListener("keydown", (event) => {
            switch (event.key) {
                case "ArrowUp":
                    if (direction !== "down") direction = "up";
                    break;
                case "ArrowDown":
                    if (direction !== "up") direction = "down";
                    break;
                case "ArrowLeft":
                    if (direction !== "right") direction = "left";
                    break;
                case "ArrowRight":
                    if (direction !== "left") direction = "right";
                    break;
            }
        });

        updateGameBoard();

    </script>
</body>

</html>