原生JavaScript實現購物車效果
本文實例為大傢分享瞭JavaScript實現購物車效果的具體代碼，供大傢參考，具體內容如下
HTML：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
table {
border: 1px solid #e9e9e9;
border-collapse: collapse;
border-spacing: 0;
}
td {
padding: 8px 16px;
border: 1px solid #e9e9e9;
text-align: left;
}
td img {
width: 50px;
height: 50px;
}
th {
background-color: #f7f7f7;
color: #5c6b77;
font-weight: 600;
}
</style>
</head>
<body>
圖書類型：<select id="xlxx" onchange="tslx()">
<option value="全部">全部</option>
<option value="科幻">科幻</option>
<option value="小說">小說</option>
<option value="文學">文學</option>
<option value="懸疑">懸疑</option>
</select>
<table border="0">
<tr>
<th><button type="button" style="border: 0;background-color: #f7f7f7;" id="qbxz"
onclick="quanxuan ()">全選</button></th>
<th>序號</th>
<th>商品名</th>
<th>書籍名</th>
<th>分類</th>
<th>價格</th>
<th>購買數量</th>
<th>操作</th>
</tr>
<tr name="wx">
<td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td>
<td>1</td>
<td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20180520083915_sMx82.jpeg"></td>
<td>活著</td>
<td>文學</td>
<td><label name="jg">25</label></td>
<td>
<button onclick="jia('num1')">+</button>
<label id="num1" name="num">1</label>
<button onclick="jian('num1')">-</button>
</td>
<td><button onclick="deletet(1)">移除</button></td>
</tr>
<tr name="kh">
<td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td>
<td>2</td>
<td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20180520083916_8ntMr.jpeg"></td>
<td>活著2</td>
<td>科幻</td>
<td><label name="jg">30</label></td>
<td>
<button onclick="jia('num2')">+</button>
<label id="num2" name="num">1</label>
<button onclick="jian('num2')">-</button>
</td>
<td><button onclick="deletet(2)">移除</button></td>
</tr>
<tr name="xs">
<td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td>
<td>3</td>
<td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20191227173047_zrXxQ.jpeg"></td>
<td>活著3</td>
<td>小說</td>
<td><label name="jg">35</label></td>
<td>
<button onclick="jia('num3')">+</button>
<label id="num3" name="num">1</label>
<button onclick="jian('num3')">-</button>
</td>
<td><button onclick="deletet(3)">移除</button></td>
</tr>
<tr name="xy">
<td><input type="checkbox" name="cb" onchange="zhjs()" id="" value="" class="qx" /></td>
<td>4</td>
<td><img onmouseover="tpmax(this.src)" onmouseout="tpmin()" src="../img/20191227173048_eGeBA.jpeg"></td>
<td>活著4</td>
<td>懸疑</td>
<td><label name="jg">40</label></td>
<td>
<button onclick="jia('num4')">+</button>
<label id="num4" name="num">1</label>
<button onclick="jian('num4')">-</button>
</td>
<td><button onclick="deletet(4)">移除</button></td>
</tr>
</table>
<h1 id="nr" style="display: none;">購物車為空！</h1>
總金額：<label id="zh" style="color: red;">0</label>￥
<img src="" style="width: 150px;" id="img">
</body>
<script type="text/javascript">
</script>
<script src="../js/gwc.js" type="text/javascript" charset="utf-8"></script>
</html>
JavaScript：
/*
1.圖片懸浮時的放大
2.全選
3.分類
4.數值的加減
5.總和的實現
6.刪除功能
*/
// 1.圖片懸浮時的放大
// 圖片移入放大
function tpmax(lj) {
//移入 將獲取到的圖片路徑加載到下方顯示圖片路徑實現移入顯示
document.getElementById("img").src = lj
}
// 圖片移出隱藏
function tpmin() {
//移出 將空的圖片路徑加載到下方顯示圖片路徑實現移出不顯示
document.getElementById("img").src = "";
}
// 2.全選
function quanxuan() {
var qxaj = document.getElementsByClassName("qx");
// 遍歷判斷復選框的狀態
for (var i = 0; i < qxaj.length; i++) {
if (qxaj[i].checked == true) {
for (var i = 0; i < qxaj.length; i++) {
qxaj[i].checked = false;
}
} else {
for (var i = 0; i < qxaj.length; i++) {
qxaj[i].checked = true;
}
}
}
zhjs();
}
// 3.分類
/*
1.隻顯示分類的:將不屬於的分類隱藏，直顯示匹配的行
2.顯示與隱藏兩個方法
*/
function tslx() {
var xlxx = document.getElementById("xlxx").value;
var kh = document.getElementsByName("kh");
var xs = document.getElementsByName("xs");
var wx = document.getElementsByName("wx");
var xy = document.getElementsByName("xy");
if (xlxx == "全部") {
xianshi(kh);
xianshi(xs);
xianshi(wx);
xianshi(xy);
}
if (xlxx == "科幻") {
xianshi(kh);
yincang(xs);
yincang(wx);
yincang(xy);
}
if (xlxx == "文學") {
yincang(kh);
yincang(xs);
xianshi(wx);
yincang(xy);
}
if (xlxx == "小說") {
yincang(kh);
xianshi(xs);
yincang(wx);
yincang(xy);
}
if (xlxx == "懸疑") {
yincang(kh);
yincang(xs);
yincang(wx);
xianshi(xy);
}
}
// 顯示
function xianshi(xlxx) {
// 遍歷尋找匹配的值
for (var i = 0; i < xlxx.length; i++) {
xlxx[i].style.visibility = "visible";
}
}
// 隱藏
function yincang(xlxx) {
for (var i = 0; i < xlxx.length; i++) {
xlxx[i].style.visibility = "collapse";
}
}
// 4.數值的加減
function jian(numid) {
var num = document.getElementById(numid).innerHTML;
var ljnum = parseInt(num) - 1;
if (ljnum > 0) {
document.getElementById(numid).innerHTML = ljnum;
}
zhjs();
}
function jia(numid) {
// 得到原始值
var num = document.getElementById(numid).innerHTML;
// 得到累加值
var ljnum = parseInt(num) + 1;
// 賦值
document.getElementById(numid).innerHTML = ljnum;
zhjs();
}
//5.總和計算
function zhjs() {
var jg = document.getElementsByName("jg");
var sl = document.getElementsByName("num");
var cb = document.getElementsByName("cb");
var sum = 0;
for (var i = 0; i < cb.length; i++) {
if (cb[i].checked == true) {
sum += parseInt(jg[i].innerHTML) * parseInt(sl[i].innerHTML);
}
}
document.getElementById("zh").innerHTML = sum;
}
// 6.刪除
// 遍歷全部tr
var s = 0;
var qbtr = document.getElementsByTagName("tr");
for (var i = 0; i < qbtr.length; i++) {
s++;
}
function deletet(index) {
// tr()
var c = document.getElementsByName("cb");
c[index - 1].checked = false;
var h = document.getElementsByTagName("tr");
h[index].style.display = "none";
s--;
if (s == 1) {
document.getElementById("nr").style.display = "block";
document.getElementById("cartb").style.display = "none";
document.getElementById("stype").style.display = "none";
}
zhjs();
}
效果：
全選:
分類：
刪除：
添加數量
以上就是本文的全部內容，希望對大傢的學習有所幫助，也希望大傢多多支持WalkonNet。