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keyboardFocus.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0
}
.container {
width: 1280px;
height: 720px;
background: #EEEEEE;
position: relative;
overflow: hidden;
}
li {
list-style: none;
width: 200px;
height: 280px;
text-align: center;
line-height: 300px;
font-size: 30px;
border: 1px solid gray;
transition: transform 0.5s;
}
.focus {
width: 200px;
height: 280px;
border: 4px solid red;
position: absolute;
top: 49px;
left: 18px;
transition: all 0.5s;
}
.group1 ul {
overflow: hidden;
width: 1942px;
height: 382px;
transform： scale(1.1, 1.1);
/*transition: all 0.5s;*/
}
.group1 ul li {
float: left;
margin: 50px 20px 0 20px;
}
.group1 ul li.first {
transform: scale(1.1, 1.1);
}
.group2 {
margin-top: 10px;
}
.group2 ul {
display: flex;
flex-direction: row;
justify-content: space-around;
}
</style>
</head>
<body>
<div class="container">
<div class="group1">
<ul id="list1">
<li class="first">一</li>
<li>二</li>
<li>三</li>
<li>四</li>
<li>五</li>
<li>六</li>
<li>七</li>
<li>八</li>
</ul>
</div>
<div class="group2">
<ul id="list2">
<li>壹</li>
<li>貮</li>
<li>叁</li>
<li>肆</li>
</ul>
</div>
<div class="focus"></div>
</div>
<script>
var active = document.getElementsByClassName('focus')[0];
var list1 = document.getElementById('list1');
var list2 = document.getElementById('list2');
var a = 0;
var Left = active.offsetLeft;
var Top = active.offsetTop;
active.style.transform = 'scale(1.1, 1.1)';
document.addEventListener('keydown', function (e) {
keyWay.upMove(e);
keyWay.downMove(e);
keyWay.leftMove(e);
keyWay.rightMove(e);
keyWay.doConfirm(e);
})
var keyWay = {
upMove: function (e) {
if (e.keyCode == 38) {
// alert('上键')
if (Top <= 49) {
alert('到顶了');
} else {
var dataArr = [];
var arr = list1.getElementsByTagName('li');
var arr2 = list2.getElementsByTagName('li');
for (var i = 0; i < arr.length; i++) {
dataArr.push(Math.abs(arr[i].offsetLeft - Left));
};
dataArr.sort(function (a, b) {return a - b});
for (var i = 0; i < arr.length; i++) {
if (arr[i].offsetLeft == Left + dataArr[0] || arr[i].offsetLeft == Left - dataArr[0]) {
Top = arr[i].offsetTop - 2;
Left = arr[i].offsetLeft - 2;
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[i].style.transform = 'scale(1.1, 1.1)';
a = i;
}
}
for (var i = 0; i < arr2.length; i++) {
arr2[i].style.transform = 'scale(1, 1)';
};
}
}
},
downMove: function (e) {
if (e.keyCode == 40) {
// alert('下键')
if (Top >= 390) {
alert('到底了');
} else {
var dataArr = [];
var arr = list2.getElementsByTagName('li');
var arr2 = list1.getElementsByTagName('li');
for (var i = 0; i < arr.length; i++) {
dataArr.push(Math.abs(arr[i].offsetLeft - Left));
};
dataArr.sort(function (a, b) {return a - b});
for (var i = 0; i < arr.length; i++) {
if (arr[i].offsetLeft == Left + dataArr[0] || arr[i].offsetLeft == Left - dataArr[0]) {
Top = arr[i].offsetTop - 2;
Left = arr[i].offsetLeft - 2;
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[i].style.transform = 'scale(1.1, 1.1)';
a = i;
}
}
for (var i = 0; i < arr2.length; i++) {
arr2[i].style.transform = 'scale(1, 1)';
};
}
}
},
leftMove: function (e) {
if (e.keyCode == 37) {
// alert('左键')
if (Top == 48 || Top == 49) {
var arr = list1.getElementsByTagName('li');
if (Left <= arr[0].offsetLeft - 2) {
alert('最左边了')
} else {
// 移动方案一：
/*if (a <= 4) {
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 5) {
list1.style.marginLeft = 0 + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 6) {
var sum = ((300 + 2) * 6 + 40 * 5 + 20) - 1920 + 40;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 7) {
var sum = ((300 + 2) * 6 + 40 * 5 + 20) - 1920 + 40 + 302 + 40;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
}*/
// 移动方案二：
if (a <= 4) {
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 5) {
var sum = 0;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 6) {
var sum = 202 + 40;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
} else if (a == 7) {
var sum = (202 + 40) * 2;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
}
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[a - 1].style.transform = 'scale(1.1, 1.1)';
arr[a].style.transform = 'scale(1, 1)';
a--;
}
} else {
var arr = list2.getElementsByTagName('li');
if (Left <= arr[0].offsetLeft - 2) {
alert('最左边了')
} else {
Left = arr[a - 1].offsetLeft - 2;
Top = arr[a - 1].offsetTop - 2;
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[a - 1].style.transform = 'scale(1.1, 1.1)';
arr[a].style.transform = 'scale(1, 1)';
a--;
}
}
}
},
rightMove: function (e) {
if (e.keyCode == 39) {
// alert('右键')
if (Top == 48 || Top == 49) {
var arr = list1.getElementsByTagName('li');
if (Left >= arr[arr.length - 1].offsetLeft - 2) {
alert('最右边了')
} else {
if (a < 4) {
Left = arr[a + 1].offsetLeft - 2;
Top = arr[a + 1].offsetTop - 2;
} else if (a == 4) {
var sum = 202 + 40;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a + 1].offsetLeft - 2;
Top = arr[a + 1].offsetTop - 2;
} else if (a == 5) {
var sum = (202 + 40) * 2;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a + 1].offsetLeft - 2;
Top = arr[a + 1].offsetTop - 2;
} else if (a == 6) {
var sum = (202 + 40) * 2 + 202 - 20;
list1.style.marginLeft = 0 - sum + 'px';
Left = arr[a + 1].offsetLeft - 2;
Top = arr[a + 1].offsetTop - 2;
}
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[a + 1].style.transform = 'scale(1.1, 1.1)';
arr[a].style.transform = 'scale(1, 1)';
a++;
}
} else {
var arr = list2.getElementsByTagName('li');
if (Left >= arr[arr.length - 1].offsetLeft - 2) {
alert('最右边了')
} else {
Left = arr[a + 1].offsetLeft - 2;
Top = arr[a + 1].offsetTop - 2;
active.style.top = Top + 'px';
active.style.left = Left + 'px';
arr[a + 1].style.transform = 'scale(1.1, 1.1)';
arr[a].style.transform = 'scale(1, 1)';
a++;
}
}
}
},
doConfirm: function (e) {
if (e.keyCode == 13) {
var Px, py;
if (/\.NET/.test(navigator.userAgent)) {
Px = e.target.children[2].offsetLeft;
Py = e.target.children[2].offsetTop;
} else {
Px = e.target.children[0].children[2].offsetLeft;
Py = e.target.children[0].children[2].offsetTop;
}
if (Py == 48 || Py == 49) {
alert('你点击了第一排第 ' + Number(a + 1) + ' 个');
} else {
alert('你点击了第二排第 ' + Number(a + 1) + ' 个');
}
}
}
}
</script>
</body>
</html>