原生JS贪吃蛇

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html

css

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html

css

@font-face {
  font-family: "game";
  src: url("https://fonts.googleapis.com/css2?family=Poppins:wght@500;800&display=swap");
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
button:focus {
  outline: 0;
}

html,
body {
  height: 100%;
  font-family: "Poppins", sans-serif;
  color: #6e7888;
}
body {
  background-color: #222738;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #6e7888;
}
canvas {
  background-color: #181825;
}
.container {
  display: flex;
  width: 100%;
  height: 100%;
  flex-flow: column wrap;
  justify-content: center;
  align-items: center;
}
#ui {
  display: flex;
  align-items: center;
  font-size: 10px;
  flex-flow: column;
  margin-left: 10px;
}
h2 {
  font-weight: 200;
  transform: rotate(270deg);
}
#score {
  margin-top: 20px;
  font-size: 30px;
  font-weight: 800;
}
.noselect {
  user-select: none;
}
#replay {
  font-size: 10px;
  padding: 10px 20px;
  background: #6e7888;
  border: none;
  color: #222738;
  border-radius: 20px;
  font-weight: 800;
  transform: rotate(270deg);
  cursor: pointer;
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
}
#replay:hover {
  background: #a6aab5;
  background: #4cffd7;
  transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
}
#replay svg {
  margin-right: 8px;
}
@media (max-width: 600px) {
  #replay {
    margin-bottom: 20px;
  }
  #replay,
  h2 {
    transform: rotate(0deg);
  }
  #ui {
    flex-flow: row wrap;
    margin-bottom: 20px;
  }
  #score {
    margin-top: 0;
    margin-left: 20px;
  }
  .container {
    flex-flow: column wrap;
  }
}
#author {
  width: 100%;
  bottom: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: inherit;
  text-transform: uppercase;
  padding-left: 35px;
}
#author span {
  font-size: 10px;
  margin-left: 20px;
  color: inherit;
  letter-spacing: 4px;
}
#author h1 {
  font-size: 25px;
}
.wrapper {
  display: flex;
  flex-flow: row wrap;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}

JavaScript

/** 
This is a snake game I made with Vanilla Javascript.
Follow me on twitter @fariatondo
**/

let dom_replay = document.querySelector("#replay");
let dom_score = document.querySelector("#score");
let dom_canvas = document.createElement("canvas");
document.querySelector("#canvas").appendChild(dom_canvas);
let CTX = dom_canvas.getContext("2d");

const W = (dom_canvas.width = 400);
const H = (dom_canvas.height = 400);

let snake,
  food,
  currentHue,
  cells = 20,
  cellSize,
  isGameOver = false,
  tails = [],
  score = 00,
  maxScore = window.localStorage.getItem("maxScore") || undefined,
  particles = [],
  splashingParticleCount = 20,
  cellsCount,
  requestID;

huePrime = ~~huePrime;
    var red;
    var green;
    var blue;

if (huePrime === 0) {
      red = chroma;
      green = secondComponent;
      blue = 0;
    } else if (huePrime === 1) {
      red = secondComponent;
      green = chroma;
      blue = 0;
    } else if (huePrime === 2) {
      red = 0;
      green = chroma;
      blue = secondComponent;
    } else if (huePrime === 3) {
      red = 0;
      green = secondComponent;
      blue = chroma;
    } else if (huePrime === 4) {
      red = secondComponent;
      green = 0;
      blue = chroma;
    } else if (huePrime === 5) {
      red = chroma;
      green = 0;
      blue = secondComponent;
    }

var lightnessAdjustment = lightness - chroma / 2;
    red += lightnessAdjustment;
    green += lightnessAdjustment;
    blue += lightnessAdjustment;

return [
      Math.round(red * 255),
      Math.round(green * 255),
      Math.round(blue * 255)
    ];
  },
  lerp(start, end, t) {
    return start * (1 - t) + end * t;
  }
};

class Snake {
  constructor(i, type) {
    this.pos = new helpers.Vec(W / 2, H / 2);
    this.dir = new helpers.Vec(0, 0);
    this.type = type;
    this.index = i;
    this.delay = 5;
    this.size = W / cells;
    this.color = "white";
    this.history = [];
    this.total = 1;
  }
  draw() {
    let { x, y } = this.pos;
    CTX.fillStyle = this.color;
    CTX.shadowBlur = 20;
    CTX.shadowColor = "rgba(255,255,255,.3 )";
    CTX.fillRect(x, y, this.size, this.size);
    CTX.shadowBlur = 0;
    if (this.total >= 2) {
      for (let i = 0; i < this.history.length - 1; i++) {
        let { x, y } = this.history[i];
        CTX.lineWidth = 1;
        CTX.fillStyle = "rgba(225,225,225,1)";
        CTX.fillRect(x, y, this.size, this.size);
      }
    }
  }
  walls() {
    let { x, y } = this.pos;
    if (x + cellSize > W) {
      this.pos.x = 0;
    }
    if (y + cellSize > W) {
      this.pos.y = 0;
    }
    if (y < 0) {
      this.pos.y = H - cellSize;
    }
    if (x < 0) {
      this.pos.x = W - cellSize;
    }
  }
  controlls() {
    let dir = this.size;
    if (KEY.ArrowUp) {
      this.dir = new helpers.Vec(0, -dir);
    }
    if (KEY.ArrowDown) {
      this.dir = new helpers.Vec(0, dir);
    }
    if (KEY.ArrowLeft) {
      this.dir = new helpers.Vec(-dir, 0);
    }
    if (KEY.ArrowRight) {
      this.dir = new helpers.Vec(dir, 0);
    }
  }
  selfCollision() {
    for (let i = 0; i < this.history.length; i++) {
      let p = this.history[i];
      if (helpers.isCollision(this.pos, p)) {
        isGameOver = true;
      }
    }
  }
  update() {
    this.walls();
    this.draw();
    this.controlls();
    if (!this.delay--) {
      if (helpers.isCollision(this.pos, food.pos)) {
        incrementScore();
        particleSplash();
        food.spawn();
        this.total++;
      }
      this.history[this.total - 1] = new helpers.Vec(this.pos.x, this.pos.y);
      for (let i = 0; i < this.total - 1; i++) {
        this.history[i] = this.history[i + 1];
      }
      this.pos.add(this.dir);
      this.delay = 5;
      this.total > 3 ? this.selfCollision() : null;
    }
  }
}

class Food {
  constructor() {
    this.pos = new helpers.Vec(
      ~~(Math.random() * cells) * cellSize,
      ~~(Math.random() * cells) * cellSize
    );
    this.color = currentHue = `hsl(${~~(Math.random() * 360)},100%,50%)`;
    this.size = cellSize;
  }
  draw() {
    let { x, y } = this.pos;
    CTX.globalCompositeOperation = "lighter";
    CTX.shadowBlur = 20;
    CTX.shadowColor = this.color;
    CTX.fillStyle = this.color;
    CTX.fillRect(x, y, this.size, this.size);
    CTX.globalCompositeOperation = "source-over";
    CTX.shadowBlur = 0;
  }
  spawn() {
    let randX = ~~(Math.random() * cells) * this.size;
    let randY = ~~(Math.random() * cells) * this.size;
    for (let path of snake.history) {
      if (helpers.isCollision(new helpers.Vec(randX, randY), path)) {
        return this.spawn();
      }
    }
    this.color = currentHue = `hsl(${helpers.randHue()}, 100%, 50%)`;
    this.pos = new helpers.Vec(randX, randY);
  }
}

class Particle {
  constructor(pos, color, size, vel) {
    this.pos = pos;
    this.color = color;
    this.size = Math.abs(size / 2);
    this.ttl = 0;
    this.gravity = -0.2;
    this.vel = vel;
  }
  draw() {
    let { x, y } = this.pos;
    let hsl = this.color
      .split("")
      .filter((l) => l.match(/[^hsl()$% ]/g))
      .join("")
      .split(",")
      .map((n) => +n);
    let [r, g, b] = helpers.hsl2rgb(hsl[0], hsl[1] / 100, hsl[2] / 100);
    CTX.shadowColor = `rgb(${r},${g},${b},${1})`;
    CTX.shadowBlur = 0;
    CTX.globalCompositeOperation = "lighter";
    CTX.fillStyle = `rgb(${r},${g},${b},${1})`;
    CTX.fillRect(x, y, this.size, this.size);
    CTX.globalCompositeOperation = "source-over";
  }
  update() {
    this.draw();
    this.size -= 0.3;
    this.ttl += 1;
    this.pos.add(this.vel);
    this.vel.y -= this.gravity;
  }
}

function incrementScore() {
  score++;
  dom_score.innerText = score.toString().padStart(2, "0");
}

function particleSplash() {
  for (let i = 0; i < splashingParticleCount; i++) {
    let vel = new helpers.Vec(Math.random() * 6 - 3, Math.random() * 6 - 3);
    let position = new helpers.Vec(food.pos.x, food.pos.y);
    particles.push(new Particle(position, currentHue, food.size, vel));
  }
}

function clear() {
  CTX.clearRect(0, 0, W, H);
}

function initialize() {
  CTX.imageSmoothingEnabled = false;
  KEY.listen();
  cellsCount = cells * cells;
  cellSize = W / cells;
  snake = new Snake();
  food = new Food();
  dom_replay.addEventListener("click", reset, false);
  loop();
}

function reset() {
  dom_score.innerText = "00";
  score = "00";
  snake = new Snake();
  food.spawn();
  KEY.resetState();
  isGameOver = false;
  clearTimeout(requestID);
  loop();
}

initialize();

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