<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>携程第三题-排序算法可视化展示</title>
</head>
<style>
.container {
position: relative;
}
.sort {
display: inline-flex;
justify-content: center;
align-items: center;
position: absolute;
width: 50px;
height: 50px;
border: 1px solid black;
transition: 2s;
}
</style>
<body>
<div class="container"></div>
<script>
let arr = [5, 4, 8, 9, 6, 5, 4, 12, 3, 6, 7, 8, 56];
let docFrag = document.createDocumentFragment();
arr.forEach((value, index) => {
let subDiv = document.createElement("div");
subDiv.innerText = `${value}`;
subDiv.classList.add("sort");
subDiv.style.left = `${index * 60}px`;
docFrag.appendChild(subDiv);
});
let containerDiv = document.querySelector(".container");
containerDiv.appendChild(docFrag);
let sortedElements = Array.prototype.slice.call(containerDiv.childNodes);
console.log(arr);
bubbleSort(arr);
console.log(arr);
function bubbleSort(items) {
let len = items.length;
let stop;
let time = 0
for (let i = 0; i < len; i++) {
for (let j = 0, stop = len - i; j < stop; j++) {
if (items[j] > items[j + 1]) {
swapArrElement(arr, j, j + 1);
setTimeout(() => {
swapDomText(sortedElements, j, j + 1);
}, time * 2000);
time++;
}
}
}
return items;
}
function swapArrElement(items, firstIndex, secondIndex) {
// let _temp = items[firstIndex];
// items[firstIndex]= items[secondIndex];
// items[secondIndex] = _temp;
[items[firstIndex], items[secondIndex]] = [items[secondIndex], items[firstIndex]];
}
function swapDomText(sortedElements, firstIndex, secondIndex) {
debugger
let _temp = sortedElements[firstIndex].innerText;
sortedElements[firstIndex].innerText = sortedElements[secondIndex].innerText;
sortedElements[secondIndex].innerText = _temp;
}
</script>
</body>
</html>
总结:1、知识点要多用多练。学了就是要用,在使用中熟练。
2、体会绝对定位的作用,setTimeout的使用,脚本化样式表的强大。