我正在尝试通过单击顶部和左侧位置为0-400的生成按钮,在现有的div中生成100个随机彩色框。另外,如果我将鼠标悬停在任何有颜色的框上,它会消失到最后一个框,这会提醒我最后一个框,最后一个框仍留着。
我设法创建了一个可以产生不同颜色的盒子,但是我不确定如何生成一个100(更不用说将鼠标悬停在上面)并删除盒子了,那怎么办?
我的HTML:
<!doctype html>
<html lang="en">
<head>
<title> Generator </title>
<meta charset="utf-8">
<script src="prototype.js"></script>
<script src="task4.js"></script>
<style>
#container {
height: 500px;
}
p {
width: 70px;
height: 70px;
background-color: rgb(100, 100, 255);
border: solid 2px black;
position: absolute;
}
</style>
</head>
<body>
<div id="container">
</div>
<button id="myButton"
onclick="createBoxes()"> Generate More
</button>
</body>
</html>
我的JS
window.onload = function()
{
createBoxes();
}
function createBoxes()
{
var colors = ["red", "green", "blue", "purple", "yellow"];
var newP = document.createElement("p");
var top = 10 + "px";
var left = 10 + "px";
newP.style.top = top;
newP.style.left = left;
newP.style.backgroundColor = colors[ Math.floor( Math.random() *5 )];
$("container").appendChild(newP);
}
window.onload = function() {
createBoxes();
}
答案 0 :(得分:2)
让我们逐步完成这项工作。
在创建框元素时,请勿使用p
标签,div
是此处的最佳选择。
据您所知,我已经执行了。 如果我错过了什么,请在评论中告诉我。
我在代码中添加了注释,请检查是否得到
window.onload = function() {
createBoxes();
}
function createBoxes() {
var left = 0;
var top = 0;
var colors = ["red", "green", "blue", "purple", "yellow"];
// create a for loop and run 99 times;
for (var i = 1; i < 100; i++) {
var newDiv = document.createElement("div");
newDiv.classList.add('box')
newDiv.style.backgroundColor = colors[Math.floor(Math.random() * 5)];
newDiv.style.top = top + 'px';
newDiv.style.left = left + 'px';
// now add the event on this one;
newDiv.addEventListener('mouseover', removeBoxes);
$("#container").append(newDiv);
left += 70; // increase left 70px each time in the loop
if (i % 5 == 0) { // if the we have 5 boxes in one row, reset left to 0px and increase top property by 70px to get another row;
left = 0;
top += 70;
}
}
}
// function to remove the boxes on hover;
function removeBoxes() {
$(this).remove();
}
// add the mouseover event listener;
$('div.box').on('mouseover', removeBoxes);
#container {
min-height: 200px;
}
div.box {
width: 70px;
height: 70px;
background-color: rgb(100, 100, 255);
border: solid 2px black;
display: inline-block;
position: absolute;
box-sizing: border-box;
}
#myButton {
position: absolute;
right: 0;
top: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="container">
</div>
<button id="myButton" onclick="createBoxes()"> Generate 99 More
</button>