用js编写简单的贪吃蛇小游戏代码示例

本篇文章小编给大家分享一下用js编写简单的贪吃蛇小游戏代码示例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

代码如下：

HTML 5 部分

js部分

tools.js

function getStyle(ele, styleObj) {
    for (const key in styleObj) {
        ele.style[key] = styleObj[key];
    }   
}
function getRandom(a, b) {
    return Math.floor(Math.random() * (b - a) + a +1)
}

snake.js

function Snake() {
    this.scence = document.querySelector('#scence');
    this.body = [
        [0, 0, 'grey', null],
        [0, 1, 'grey', null],
        [0, 2, '#000', null]
    ];
    this.dir = 'right';
    this.lastdir = 'right';
    this.;
    this.;
    this.scence_w = scence.offsetWidth;
    this.scence_h = scence.offsetHeight;
}
Snake.prototype.found = function () {
    for (let i = 0; i  {
        e = e || window.event;
        let key = e.keyCode;
        switch (key) {
            case 39:
                if (this.lastdir == 'left') {
                    this.dir = 'left'
                } else {
                    this.dir = 'right'
                };
                break;
            case 37:
                if (this.lastdir == 'right') {
                    this.dir = 'right'
                } else {
                    this.dir = 'left'
                };
                break;
            case 38:
                if (this.lastdir == 'down') {
                    this.dir = 'down'
                } else {
                    this.dir = 'up'
                };
                break;
            case 40:
                if (this.lastdir == 'up') {
                    this.dir = 'up'
                } else {
                    this.dir = 'down'
                };
                break;
        }
    }
}

//游戏结束
Snake.prototype.over = function () {
    let top = this.body[this.body.length - 1][0];
    let left = this.body[this.body.length - 1][1];
    let width = this.scence_w / this.width - 1;
    let height = this.scence_w / this.height - 1;
    if (top  width || left > height) {
        clearInterval(timeid)
        alert('game over');
    }
    for (let i = 0; i 

	food.js

function Food() {
  this.scence = document.querySelector('#scence');
  this.;
  this.;
  this.body = [-1, -1, 'red', null];
  this.scence_w = scence.offsetWidth;
  this.scence_h = scence.offsetHeight;
  
}
//食物生成
Food.prototype.crteate = function () {
  this.body[1] = getRandom(0, this.scence_w / this.width-1);
  this.body[0] = getRandom(0, this.scence_h / this.height-1);
  this.body[3] = document.createElement('div');
  getStyle(this.body[3], {
    width: this.width + 'px',
    height: this.height + 'px',
    position: 'absolute',
    top: this.height * (this.body[0] ) + 'px',
    left: this.width * (this.body[1] ) + 'px',
    backgroundColor: this.body[2],
    borderRadius: ' 50%',
  });
  this.scence.appendChild(this.body[3]);


}
//蛇吃到食物
Food.prototype.eat=function(){
  // const new=[0, 0, 'grey', null]
if(snake.body[snake.body.length-1][0]==this.body[0] && snake.body[snake.body.length-1][1]==this.body[1]){
  this.scence.removeChild(this.body[3]);
  this.crteate();
  snake.body.unshift([-1,-1,"grey",null])
}
}
let food = new Food();
food.crteate();
food.eat();