我正在尝试制作具有可变边框半径的形状。
基于修饰符，形状的边框半径应为 50%(当 Math.random() > 0.5 时)、20%(当 Math.random() > 0.8 时) )，默认为 0 %，给出一个普通的正方形。
但是，当您使用单击功能时，它只会给出 20% 半径或默认形状，而不是 50% 半径。
这是关键方法的简化版本:
function makeShapeAppear() {
var top = Math.random() * 400;
var left = Math.random() * 400;
var width = (Math.random() * 100) + 100;
if (Math.random() > 0.5) {
document.getElementById("shape").style.borderRadius = "50%"
} else {
document.getElementById("shape").style.borderRadius = "0";
}
if (Math.random() > 0.8) {
document.getElementById("shape").style.borderRadius = "20%"
} else {
document.getElementById("shape").style.borderRadius = "0";
}
}
完整的代码片段:
var bestTime = 0;
var start = new Date().getTime();
function getRandomColor() {
var letters = '0123456789ABCDEF'.split('');
var color = '#';
for (var i = 0; i < 6; i++) {
color += letters[Math.floor(Math.random() * 16)];
}
return color;
}
function makeShapeAppear() {
var top = Math.random() * 400;
var left = Math.random() * 400;
var width = (Math.random() * 100) + 100;
if (Math.random() > 0.5) {
document.getElementById("shape").style.borderRadius = "50%"
} else {
document.getElementById("shape").style.borderRadius = "0";
}
if (Math.random() > 0.8) {
document.getElementById("shape").style.borderRadius = "20%"
} else {
document.getElementById("shape").style.borderRadius = "0";
}
document.getElementById("shape").style.backgroundColor = getRandomColor();
document.getElementById("shape").style.width = width + "px";
document.getElementById("shape").style.height = width + "px";
document.getElementById("shape").style.top = top + "px";
document.getElementById("shape").style.left = left + "px";
document.getElementById("shape").style.display = "block";
start = new Date().getTime();
}
function appearAfterDelay() {
setTimeout(makeShapeAppear, Math.random() * 2000)
}
appearAfterDelay();
document.getElementById("shape").onclick = function() {
document.getElementById("shape").style.display = "none";
var end = new Date().getTime();
var timeTaken = (end - start) / 1000;
document.getElementById("timeTaken").innerHTML = timeTaken + "'s";
if (timeTaken < bestTime || bestTime == 0) {
bestTime = timeTaken;
document.getElementById("best").innerHTML = bestTime + "s"
}
appearAfterDelay();
}body {
background-color: azure;
margin: 0;
padding: 0;
font-family: sans-serif;
}
#shape {
background-color: red;
width: 200px;
height: 200px;
display: none;
position: relative;
}
.bold {
font-weight: bold;
}
#best {
color: limegreen;
font-weight: bold;
}<head>
<title>Javascript Test You Reactions</title>
</head>
<body>
<h1>Test Your Reactions!</h1>
<P>Click on the squares and circles as <em><ins>quickly</ins></em>as you can!</P>
<p class="bold">Your time: <span id="timeTaken"></span></p>
<p>Best time: <span id="best"></span></p>
<div id="shape"></div>
</body>最佳答案
您可以使用以下代码来获取形状半径
var randomNumber = Math.Random();
if (randomNumber > 0.8) {
document.getElementById("shape").style.borderRadius = "20%";
}
else if (randomNumber > 0.5) {
document.getElementById("shape").style.borderRadius = "50%";
} else {
document.getElementById("shape").style.borderRadius = "0";
}
关于javascript - 如何生成多个边界半径，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47346908/