原生js实现一个星级大战飞船射击小游戏-html代码-BFW代码库

代码语言：html
所属分类：游戏
代码描述：原生js实现一个星级大战飞船射击小游戏
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
* {
  padding: 0;
  margin: 0;
}

body {
  background: black;
}

#canvas {
  background: black;
  border: solid 5px white;
  position: absolute;
  top: calc(50% - 245px);
  left: calc(50% - 185px);
  outline: none;
}
</style>

</head>
<body translate="no">
<canvas width="360" height="480" id="canvas" tabindex="0"></canvas>

<script >
"use strict";

/**************************/
/***** CLASS : HELPER *****/
/**************************/
class Helper {
  randNumGen(from, to) {
    return Math.floor(Math.random() * (to + 1) + from);
  }}


/**************************/
/***** CLASS : IMAGES *****/
/**************************/
class Images {
  base64ToImg(value) {
    var img = new Image();
    img.src = value;
    return img;
  }

  spaceship() {
    return this.base64ToImg("data:image/png;base64,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");
  }

  bacteria() {
    return this.base64ToImg("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAfCAYAAAAfrhY5AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAAOwgAADsIBFShKgAAAABh0RVh0U29mdHdhcmUAcGFpbnQubmV0IDQuMC45bDN+TgAAAMxJREFUWEe1jUEOAzEIA/f/n07ZyIoyULUc8EhzMJD4WZV35hKUQZAfTArKIMgPJgVlEOQHk4K/B8OgC0E6QReCdIIuBOkEXQjSCboQpBN0IcjDE+vsLxr3d8/eZg+Nz0Dj/u7Z2+yh8Rlo3N89e5s9ND4Djfu7Z2+zh8ZnoHF/9+xt1gm6EKQTdCFIJ+hCkE7QhSCdoAtBOkEXgnSCLgTpBF0I0gm6EKQTdCFIJ+hCkE7Q9a0MB8OCMgjyg0lBGQT5waSgDIL8YNKLtT7FZfG33M06KgAAAABJRU5ErkJggg==");
  }

  title() {
    return this.base64ToImg("data:image/png;base64,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");
  }

  controls() {
    return this.base64ToImg("data:image/png;base64,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");
  }

  begin() {
    return this.base64ToImg("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAREAAAAPCAYAAADDP/vRAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsIAAA7CARUoSoAAAAEJSURBVHhe7dmxDsIwDIThlPd/Z2DoYIZTz1xCW/F/C8i6Ok6HKIjt+TYObNu2fxvDiF8633X3/d493/Vv8yTz12e7mVp/7J8A8BUOEQCRj58z6rqyoq6sznfNmmd1XZmVP6uecHqunqfbv7tuMqfzbM0o3EQARDhEAET4d+bAlffr7OvK8yvOvhzOu1IZ51nH6vfTzVfOHlWm1rmJAIhwiACIyH9nlHqNqZIrk6PbZ9a6iuo/a87V/ZVZ8zj1ypmtS81Qdefv6vbvrpv0STK1zk0EQIRDBEAk+jnjXJ9qXfllviuZx1lX5Z26clZ+RT3h9KwZJZmn2391vuq+H7UuNxEAEQ4RAIExXrW9eRXl9rFWAAAAAElFTkSuQmCC");
  }

  gameover() {
    return this.base64ToImg("data:image/png;base64,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");
  }

  score() {
    return this.base64ToImg("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEUAAAAPCAYAAACyTgIjAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAACASURBVFhH7ZdLCoAwEENnvP+d/UAXIyaYoRS6yNsoQ2olvCLmeRM/ZOa4ixDiW+cVjnE1BZcCeB0fRbOq60x+9VyBrbUpAJcCmPr6KLqyvDJnzOQVbArApQAer6B/Xe0Z3eew48D26r5Pha21KQCXAtj636c7Z9S8gk0BuJQPERdpJmUVisHDJgAAAABJRU5ErkJggg==");
  }

  life0() {
    return this.base64ToImg("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEUAAAAPCAYAAACyTgIjAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsIAAA7CARUoSoAAAABzSURBVFhH7dXBCsAwCANQ3f//87qDh4xGiBR2Wd5lo6gUUZr3I0pm.........完整代码请登录后点击上方下载按钮下载查看