JS手写一个打字的游戏
html部分
<body>
<div class="setting">
<div class="grade-box">
你的成绩：<div class="grade">0</div> 分
</div>
<div class="rank">选择难度：
<button onclick="changeRank('simple')">简单</button>
<button onclick="changeRank('middle')">中等</button>
<button onclick="changeRank('hard')">困难</button>
</div>
</div>
<div class="game-box">
</div>
</body>
style样式部分：
<style>
body{
display: flex;
justify-content: center;
align-items: center;
background-color: rgb(199,237,204);
font-size: 15px;
}
.game-box{
background-color: rgba(0, 0, 0, 0.9);
position: relative;
width: 300px;
height: 500px;
border: 1px solid black;
margin-left: 10px;
box-shadow: 5px 5px 20px lightblue;
font-size: 25px;
}
.grade-box{
font-size: 15px;
display: flex;
}
.rank{
display: flex;
justify-content: space-around;
}
.grade{
color: red;
}
</style>
JS页面交互部分
<script>
let box = document.getElementsByClassName('game-box')[0]
let gradeBox = document.getElementsByClassName('grade')[0]
let max = 0
let click = ''
let style = {}
let gameStatus = ''
let gameGrade = 0
let gameRank = 0
// 游戏总定时器
let gameSt = ''
// 游戏初始化
let gameInit = function(){
max = 0
click = ''
style = {}
gameStatus = ''
gameGrade = 0
gameRank = 0
clearInterval(gameSt)
gameSt = ''
box.childNodes = []
}
// 产生随机数
var randomNum = function(mul,add = 0){
// 产生范围在 [0 +add , mul + add ） 的随机数
return Math.floor(Math.random() * mul + add)
}
// 捕捉按键
document.onkeydown = function(e) {
click = e.key
}
// 产生节点
let startGame = function(){
let word0 = new Word()
gameSt = setInterval(()=>{
if(gameStatus === 'fail'){
clearInterval(gameSt)
}
else{
if(gameGrade > 100){
gameRank += 1
}
let word1 = new Word()
}
},1500- gameRank*200)
}
// 删除节点
let delWord = function(obj){
for(var key in obj){
delete obj[key];
}
}
// 游戏产生字母节点类
let Word = function(){
this.y = 3
this.x = randomNum(280,10)
this.speed = Math.floor(Math.random()*2? 100 : 200)
this.name = String.fromCharCode(randomNum(26,97))
// 初始化字母节点属性
this.node = document.createElement('div')
this.node.innerText = this.name
this.node.style.position = 'absolute'
this.node.style.left = this.x + "px"
this.node.style.top = this.y +'px'
this.node.style.color = 'rgb(' + randomNum(156,100)+ ',' + randomNum(156,100) +','+ randomNum(156,100) + ')'
box.appendChild(this.node)
this.init()
}
Word.prototype = {
init(){
// 初始化
this.getWord()
},
// 节点移动属性
move(){
this.y += 2
this.node.style.top = this.y +"px"
},
getWord(){
// 节点开始运转
let st = setInterval(()=>{
this.move()
if(this.y >= 470) {
gameStatus = 'fail'
alert('游戏失败')
clearInterval(st)
gameInit()
delWord(this)
return
}
if(this.y >= max){
max = this.y
if(this.name === click){
// 这个判断放里面是为了确保只能点击最下面的字母
// 放外面 可以任意点击出现的字母
clearInterval(st)
click = ''
box.removeChild(this.node)
gameGrade += 1
if(gameGrade >= 20){
alert('666，通关了！！！')
gameInit()
}
gradeBox.innerText = gameGrade
delWord(this)
max = 0 //重置最大点
}
}
},this.speed - gameRank*10 )
}
}
startGame()
// 难度按钮点击触发
let changeRank = function(type = ''){
switch(type){
case 'simple' :
gameRank = 0
break;
case 'middle' :
gameRank = 2
break;
case 'hard':
gameRank = 6
break
}
}
</script>
