在下面的代码中，您将注意到我有两个事件侦听器
window.addEventListener("click", jump);
window.addEventListener("click", jump());
问题是删除其中任何一个使事件监听器无效，即它不起作用，它们都必须存在，我很难弄清楚为什么。
注意:点击跳转并查看整个页面的片段，因为我还没有完成响应部分
const ball = document.querySelector(".ball");
const obs = document.querySelector(".obstacle");
const score = document.querySelector("#s");
let temp = 0; // a temporary variable to stop event listener from running as soon as game starts
function jump() {
let bottom = parseInt(window.getComputedStyle(ball).getPropertyValue('bottom'));
if (temp > 0 && bottom === 150) {
ball.style.bottom = "400px";
setTimeout(() => {
ball.style.bottom = "150px";
}, 300);
}
temp++;
}
window.addEventListener("click", jump);
window.addEventListener("click", jump());
let z = 0; // intitial score to be incremented by each succesful second
setInterval(() => {
let ballX = parseInt(window.getComputedStyle(ball).getPropertyValue('bottom'));
let obsY = parseInt(window.getComputedStyle(obs).getPropertyValue('right'));
if (ballX >= 150 && ballX <= 240 && obsY >= 785 && obsY <= 970) {
ball.style.animationPlayState = "paused";
obs.style.animationPlayState = "paused";
ball.style.bottom = `${ballX}px`
window.removeEventListener("keydown", jump);
clearInterval();
} else {
s.innerHTML = z;
z += 1;
}
}, 10);
window.onload = () => {
if (screen.availHeight > screen.availWidth) {
alert("This game is best played in landscape, so rotate your phone if you can :)");
}
}@import url('https://fonts.googleapis.com/css2?family=Comic+Neue&display=swap');
* {
margin: 0;
padding: 0;
}
body {
height: 100vh;
width: 100vw;
display: flex;
justify-content: center;
align-items: center;
}
.screen {
margin: 20px;
width: 1000px;
height: 500px;
background: skyblue;
outline: solid 3px;
position: absolute;
overflow: hidden;
}
.score {
position: absolute;
top: 5px;
right: 5px;
width: 200px;
height: 50px;
display: flex;
align-items: flex-end;
font-size: 150%;
font-family: "Comic Neue";
font-weight: bold;
}
.s {
display: flex;
justify-content: center;
align-items: center;
line-height: 50px;
text-shadow: 3px 3px 0px white;
}
#s-title {
width: 40%;
}
#s {
width: 60%;
}
.ball {
position: absolute;
left: 30px;
bottom: 150px;
width: 80px;
height: 80px;
border-radius: 50%;
background: red;
transition: bottom 0.3s ease-in-out;
animation: spin 1s linear infinite;
}
@keyframes spin {
to {
transform: rotate(720deg);
}
}
.obstacle {
width: 100px;
height: 100px;
position: absolute;
right: -150px;
bottom: 150px;
background: red;
animation: attack 1.5s linear infinite;
animation-play-state: running;
}
@keyframes attack {
to {
right: 1150px;
}
}
.grass {
position: absolute;
bottom: 125px;
width: 100%;
height: 25px;
background: rgb(55, 141, 52);
}
.ground {
position: absolute;
bottom: 0;
width: 100%;
height: 125px;
background: rgb(82, 80, 69);
}<!doctype html>
<html lang='en'>
<head>
<!-- Required meta tags -->
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<title>Rollin</title>
<link rel='stylesheet' href='rollin.css'>
<link rel='icon' href='assets/logo.ico'>
</head>
<body>
<div class="screen">
<div class="score">
<div id="s-title" class="s">Score:</div>
<div id="s" class="s">000000</div>
</div>
<div class="ball">
<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="100%" height="100%" version="1.1" style="shape-rendering:geometricPrecision; text-rendering:geometricPrecision; image-rendering:optimizeQuality; fill-rule:evenodd; clip-rule:evenodd"
viewBox="0 0 1024 1024" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xodm="http://www.corel.com/coreldraw/odm/2003">
<defs>
<style type="text/css">
.str0 {stroke:black;stroke-width:0.667;stroke-miterlimit:2.61313}
.fil1 {fill:black}
.fil2 {fill:#1A1A1A}
.fil0 {fill:#AE0000}
</style>
</defs>
<g id="Layer_x0020_1">
<metadata id="CorelCorpID_0Corel-Layer"/>
<g>
<path class="fil0" d="M517.231 11.182c277.954,0 503.28,225.327 503.28,503.281 0,277.954 -225.326,503.281 -503.28,503.281 -277.954,0 -503.281,-225.327 -503.281,-503.281 0,-277.954 225.327,-503.281 503.281,-503.281z"/>
<path id="1" class="fil1" d="M517.231 11.182c277.954,0 503.28,225.327 503.28,503.281 0,277.954 -225.326,503.281 -503.28,503.281 -277.954,0 -503.281,-225.327 -503.281,-503.281 0,-277.954 225.327,-503.281 503.281,-503.281zm338.197 165.084c-86.55,-86.551 -206.121,-140.084 -338.197,-140.084 -132.076,0 -251.648,53.533 -338.198,140.084 -86.55,86.55 -140.083,206.121 -140.083,338.197 0,132.076 53.533,251.647 140.083,338.197 86.551,86.551 206.122,140.084 338.198,140.084 132.076,0 251.647,-53.533 338.197,-140.084 86.551,-86.55 140.083,-206.121 140.083,-338.197 0,-132.076 -53.532,-251.647 -140.083,-338.197z"/>
</g>
<g>
<path class="fil2" d="M517.231 246.225c149.688,0 271.035,121.346 271.035,271.035 0,149.688 -121.347,271.035 -271.035,271.035 -149.689,0 -271.035,-121.347 -271.035,-271.035 0,-149.689 121.346,-271.035 271.035,-271.035zm184.58 86.454c-47.237,-47.237 -112.497,-76.454 -184.58,-76.454 -72.084,0 -137.343,29.217 -184.581,76.454 -47.237,47.238 -76.455,112.497 -76.455,184.581 0,72.083 29.218,137.343 76.455,184.58 47.238,47.237 112.497,76.455 184.581,76.455 72.083,0 137.343,-29.218 184.58,-76.455 47.237,-47.237 76.455,-112.497 76.455,-184.58 0,-72.084 -29.218,-137.343 -76.455,-184.581z"/>
</g>
<circle class="fil1 str0" cx="517.231" cy="517.26" r="100.656"/>
<path class="fil1 str0" d="M213.398 645.876c-54.056,-27.029 -41.008,-69.901 -48.444,-92.065 -3.228,-9.623 -41.293,134.779 56.413,170.477 18.411,6.727 36.767,13.855 70.319,8.264 25.978,-4.33 61.512,-22.368 72.238,-53.613 12.934,-37.676 6.05,-56.363 -16.318,-82.46 -8.188,-9.553 -35.416,-37.28 -89.472,-20.504 -33.759,19.875 -36.584,43.161 -44.736,69.901z"/>
<path class="fil1 str0" d="M561.667 188.198c52.09,-14.249 81.039,-0.564 103.952,4.079 9.948,2.016 -96.076,-103.15 -175.843,-36.384 -15.032,12.581 -30.384,24.914 -42.317,56.766 -9.24,24.663 -11.386,64.455 10.311,89.367 26.161,30.039 45.787,33.421 79.571,27.098 12.367,-2.315 49.994,-12.031 62.493,-67.234 -0.333,-39.173 -19.087,-53.263 -38.167,-73.692z"/>
<path class="fil1 str0" d="M786.104 714.481c3.621,60.329 -40.031,70.465 -55.509,87.986 -6.72,7.607 137.369,-31.629 119.431,-134.093 -3.38,-19.308 -6.384,-38.769 -28.003,-65.031 -16.738,-20.332 -50.127,-42.086 -82.549,-35.753 -39.095,7.637 -51.837,22.942 -63.253,55.361 -4.179,11.868 -14.578,49.312 26.979,87.737 34.092,19.299 55.671,10.103 82.904,3.793z"/>
</g>
</svg>
</div>
<div class="obstacle">
<img src="assets/kakashi.png" alt="">
</div>
<div class="grass"></div>
<div class="ground"></div>
</div>
<script src='rollin.js' defer></script>
</body>
</html>为什么不工作?你可以在这里做得更好:jsfidle
const ball = document.querySelector(".ball");
const obs = document.querySelector(".obstacle");
const score = document.querySelector("#s");
let temp = 0; // a temporary variable to stop event listener from running as soon as game starts
function jump() {
let bottom = parseInt(window.getComputedStyle(ball).getPropertyValue('bottom'));
if (temp > 0 && bottom === 150) {
ball.style.bottom = "400px";
setTimeout(() => {
ball.style.bottom = "150px";
}, 300);
}
temp++;
}
window.addEventListener("click", jump);
let z = 0; // intitial score to be incremented by each succesful second
setInterval(() => {
let ballX = parseInt(window.getComputedStyle(ball).getPropertyValue('bottom'));
let obsY = parseInt(window.getComputedStyle(obs).getPropertyValue('right'));
if (ballX >= 150 && ballX <= 240 && obsY >= 785 && obsY <= 970) {
ball.style.animationPlayState = "paused";
obs.style.animationPlayState = "paused";
ball.style.bottom = `${ballX}px`
window.removeEventListener("keydown", jump);
clearInterval();
} else {
s.innerHTML = z;
z += 1;
}
}, 10);
window.onload = () => {
if (screen.availHeight > screen.availWidth) {
alert("This game is best played in landscape, so rotate your phone if you can :)");
}
}@import url('https://fonts.googleapis.com/css2?family=Comic+Neue&display=swap');
* {
margin: 0;
padding: 0;
}
body {
height: 100vh;
width: 100vw;
display: flex;
justify-content: center;
align-items: center;
}
.screen {
margin: 20px;
width: 1000px;
height: 500px;
background: skyblue;
outline: solid 3px;
position: absolute;
overflow: hidden;
}
.score {
position: absolute;
top: 5px;
right: 5px;
width: 200px;
height: 50px;
display: flex;
align-items: flex-end;
font-size: 150%;
font-family: "Comic Neue";
font-weight: bold;
}
.s {
display: flex;
justify-content: center;
align-items: center;
line-height: 50px;
text-shadow: 3px 3px 0px white;
}
#s-title {
width: 40%;
}
#s {
width: 60%;
}
.ball {
position: absolute;
left: 30px;
bottom: 150px;
width: 80px;
height: 80px;
border-radius: 50%;
background: red;
transition: bottom 0.3s ease-in-out;
animation: spin 1s linear infinite;
}
@keyframes spin {
to {
transform: rotate(720deg);
}
}
.obstacle {
width: 100px;
height: 100px;
position: absolute;
right: -150px;
bottom: 150px;
background: red;
animation: attack 1.5s linear infinite;
animation-play-state: running;
}
@keyframes attack {
to {
right: 1150px;
}
}
.grass {
position: absolute;
bottom: 125px;
width: 100%;
height: 25px;
background: rgb(55, 141, 52);
}
.ground {
position: absolute;
bottom: 0;
width: 100%;
height: 125px;
background: rgb(82, 80, 69);
}<!doctype html>
<html lang='en'>
<head>
<!-- Required meta tags -->
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<title>Rollin</title>
<link rel='stylesheet' href='rollin.css'>
<link rel='icon' href='assets/logo.ico'>
</head>
<body>
<div class="screen">
<div class="score">
<div id="s-title" class="s">Score:</div>
<div id="s" class="s">000000</div>
</div>
<div class="ball">
<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="100%" height="100%" version="1.1" style="shape-rendering:geometricPrecision; text-rendering:geometricPrecision; image-rendering:optimizeQuality; fill-rule:evenodd; clip-rule:evenodd"
viewBox="0 0 1024 1024" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xodm="http://www.corel.com/coreldraw/odm/2003">
<defs>
<style type="text/css">
.str0 {stroke:black;stroke-width:0.667;stroke-miterlimit:2.61313}
.fil1 {fill:black}
.fil2 {fill:#1A1A1A}
.fil0 {fill:#AE0000}
</style>
</defs>
<g id="Layer_x0020_1">
<metadata id="CorelCorpID_0Corel-Layer"/>
<g>
<path class="fil0" d="M517.231 11.182c277.954,0 503.28,225.327 503.28,503.281 0,277.954 -225.326,503.281 -503.28,503.281 -277.954,0 -503.281,-225.327 -503.281,-503.281 0,-277.954 225.327,-503.281 503.281,-503.281z"/>
<path id="1" class="fil1" d="M517.231 11.182c277.954,0 503.28,225.327 503.28,503.281 0,277.954 -225.326,503.281 -503.28,503.281 -277.954,0 -503.281,-225.327 -503.281,-503.281 0,-277.954 225.327,-503.281 503.281,-503.281zm338.197 165.084c-86.55,-86.551 -206.121,-140.084 -338.197,-140.084 -132.076,0 -251.648,53.533 -338.198,140.084 -86.55,86.55 -140.083,206.121 -140.083,338.197 0,132.076 53.533,251.647 140.083,338.197 86.551,86.551 206.122,140.084 338.198,140.084 132.076,0 251.647,-53.533 338.197,-140.084 86.551,-86.55 140.083,-206.121 140.083,-338.197 0,-132.076 -53.532,-251.647 -140.083,-338.197z"/>
</g>
<g>
<path class="fil2" d="M517.231 246.225c149.688,0 271.035,121.346 271.035,271.035 0,149.688 -121.347,271.035 -271.035,271.035 -149.689,0 -271.035,-121.347 -271.035,-271.035 0,-149.689 121.346,-271.035 271.035,-271.035zm184.58 86.454c-47.237,-47.237 -112.497,-76.454 -184.58,-76.454 -72.084,0 -137.343,29.217 -184.581,76.454 -47.237,47.238 -76.455,112.497 -76.455,184.581 0,72.083 29.218,137.343 76.455,184.58 47.238,47.237 112.497,76.455 184.581,76.455 72.083,0 137.343,-29.218 184.58,-76.455 47.237,-47.237 76.455,-112.497 76.455,-184.58 0,-72.084 -29.218,-137.343 -76.455,-184.581z"/>
</g>
<circle class="fil1 str0" cx="517.231" cy="517.26" r="100.656"/>
<path class="fil1 str0" d="M213.398 645.876c-54.056,-27.029 -41.008,-69.901 -48.444,-92.065 -3.228,-9.623 -41.293,134.779 56.413,170.477 18.411,6.727 36.767,13.855 70.319,8.264 25.978,-4.33 61.512,-22.368 72.238,-53.613 12.934,-37.676 6.05,-56.363 -16.318,-82.46 -8.188,-9.553 -35.416,-37.28 -89.472,-20.504 -33.759,19.875 -36.584,43.161 -44.736,69.901z"/>
<path class="fil1 str0" d="M561.667 188.198c52.09,-14.249 81.039,-0.564 103.952,4.079 9.948,2.016 -96.076,-103.15 -175.843,-36.384 -15.032,12.581 -30.384,24.914 -42.317,56.766 -9.24,24.663 -11.386,64.455 10.311,89.367 26.161,30.039 45.787,33.421 79.571,27.098 12.367,-2.315 49.994,-12.031 62.493,-67.234 -0.333,-39.173 -19.087,-53.263 -38.167,-73.692z"/>
<path class="fil1 str0" d="M786.104 714.481c3.621,60.329 -40.031,70.465 -55.509,87.986 -6.72,7.607 137.369,-31.629 119.431,-134.093 -3.38,-19.308 -6.384,-38.769 -28.003,-65.031 -16.738,-20.332 -50.127,-42.086 -82.549,-35.753 -39.095,7.637 -51.837,22.942 -63.253,55.361 -4.179,11.868 -14.578,49.312 26.979,87.737 34.092,19.299 55.671,10.103 82.904,3.793z"/>
</g>
</svg>
</div>
<div class="obstacle">
<img src="assets/kakashi.png" alt="">
</div>
<div class="grass"></div>
<div class="ground"></div>
</div>
<script src='rollin.js' defer></script>
</body>
</html>您可以尝试将-listener-置于-jump-函数之上并删除:
-- window.addEventListener("click", jump()); --