js手寫貪吃蛇游戲?qū)嵗创a

更新時間：2023年09月05日 09:06:21 作者：下一站丶

這篇文章主要給大家介紹了關(guān)于js手寫貪吃蛇游戲的相關(guān)資料,貪吃蛇游戲是一款經(jīng)典的游戲,在很多平臺上都有出現(xiàn),文中給出了詳細源代碼,需要的朋友可以參考下

前端手寫貪吃蛇游戲

貪吃蛇游戲場景使用了js 和 html /css 就可以完成一個貪吃蛇小游戲

技術(shù)分析

主要用到的幾個技術(shù)點：

clientWidth ：元素的寬度，包含內(nèi)邊距
clientHeight ：元素的高度，包含內(nèi)邊距
setInterval：開啟定時器
clearInterval：關(guān)閉定時器
keydown：鍵盤事件
createElement ：創(chuàng)建節(jié)點

首先需要一個背景板需要吧蛇和食物在指定內(nèi)容里不能超出接下來就是蛇的移動使用定時間一秒移動一格食物就是根據(jù)計算隨機生成當蛇和食物的位置重疊了就可以認為蛇吃到了食物當蛇的x，y 大于元素的寬度/高度,就認為碰到了墻壁直接ov

以上就是關(guān)鍵技術(shù)點直接源碼

源碼

HTML

<div id="game-board"></div>

JS

<script>
  const gameBoard = document.getElementById("game-board");
  let snake = [{ x: 0, y: 0 }];
  let food = { x: 0, y: 0 };
  let direction = "right";
  function createSnake() {
    for (let segment of snake) {
      const snakeSegment = document.createElement("div");
      snakeSegment.className = "snake";
      snakeSegment.style.left = segment.x + "px";
      snakeSegment.style.top = segment.y + "px";
      gameBoard.appendChild(snakeSegment);
    }
  }
  function createFood() {
    const maxX = gameBoard.clientWidth - 20;
    const maxY = gameBoard.clientHeight - 20;
    food.x = Math.floor(Math.random() * maxX);
    food.y = Math.floor(Math.random() * maxY);
    const foodElement = document.createElement("div");
    foodElement.className = "food";
    foodElement.style.left = food.x + "px";
    foodElement.style.top = food.y + "px";
    gameBoard.appendChild(foodElement);
  }
  function updateGame() {
    const snakeHead = { x: snake[0].x, y: snake[0].y };
    // Move the snake
    if (direction === "right") snakeHead.x += 20;
    else if (direction === "left") snakeHead.x -= 20;
    else if (direction === "up") snakeHead.y -= 20;
    else if (direction === "down") snakeHead.y += 20;
    // Check for collision with food
    if (snakeHead.x === food.x && snakeHead.y === food.y) {
      snake.push({ x: snakeHead.x, y: snakeHead.y });
      const foodElement = document.querySelector(".food");
      foodElement.remove();
      createFood();
    }
    // Remove the tail segment
    snake.pop();
    // Check for collision with walls or itself
    if (
      snakeHead.x < 0 ||
      snakeHead.x >= gameBoard.clientWidth ||
      snakeHead.y < 0 ||
      snakeHead.y >= gameBoard.clientHeight
    ) {
      clearInterval(gameInterval);
      alert("Game Over!");
      return;
    }
    for (let segment of snake) {
      if (segment.x === snakeHead.x && segment.y === snakeHead.y) {
        clearInterval(gameInterval);
        alert("Game Over!");
        return;
      }
    }
    // Update the snake on the game board
    snake.unshift({ x: snakeHead.x, y: snakeHead.y });
    const snakeSegments = document.querySelectorAll(".snake");
    for (let i = 0; i < snakeSegments.length; i++) {
      snakeSegments[i].style.left = snake[i].x + "px";
      snakeSegments[i].style.top = snake[i].y + "px";
    }
  }
  createSnake();
  createFood();
  const gameInterval = setInterval(updateGame, 150);
  document.addEventListener("keydown", (event) => {
    if (event.key === "ArrowRight" && direction !== "left") direction = "right";
    else if (event.key === "ArrowLeft" && direction !== "right") direction = "left";
    else if (event.key === "ArrowUp" && direction !== "down") direction = "up";
    else if (event.key === "ArrowDown" && direction !== "up") direction = "down";
  });
</script>

CSS

<style>
  #game-board {
    width: 300px;
    height: 300px;
    border: 1px solid black;
    position: relative;
  }
  .snake {
    width: 20px;
    height: 20px;
    background-color: green;
    position: absolute;
  }
  .food {
    width: 20px;
    height: 20px;
    background-color: red;
    position: absolute;
  }
</style>

以上就實現(xiàn)了簡單的貪吃蛇功能