本文实例为大家分享了jQuery实现购物车全功能的具体代码,供大家参考,具体内容如下
效果图:
HTML&&CSS:
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<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
< title >Document</ title >
< script src = "../jquery-3.4.1.min.js" ></ script >
< style >
* {
margin: 0;
padding: 0;
}
.tab {
width: 500px;
border-collapse: collapse;
margin: 0 auto;
}
.tab td,
th {
border: 1px solid #000;
}
.tab .num {
width: 20px;
}
.tab .add,
.sub {
width: 20px;
}
.current {
background-color: pink;
}
</ style >
</ head >
< body >
< table class = "tab" >
< thead >
< th >全选 < input type = "checkbox" name = "" value = "" class = "checkAll" >
< input type = "checkbox" name = "" value = "" class = "checkAll" >
</ th >
< th >商品名称</ th >
< th >单价</ th >
< th >数量</ th >
< th >小计</ th >
< th >操作</ th >
</ thead >
< tbody >
< tr >
< td >< input type = "checkbox" class = "ed" /></ td >
< td >电脑</ td >
< td class = "price" >¥200.20</ td >
< td >
< button type = "button" class = "sub" >-</ button >
< input type = "text" name = "" value = "1" class = "num" >
< button type = "button" class = "add" >+</ button >
</ td >
< td class = "small_total" >¥200.20</ td >
< td class = "delete" >删除</ td >
</ tr >
< tr >
< td >< input type = "checkbox" class = "ed" /></ td >
< td >手机</ td >
< td class = "price" >¥100.30</ td >
< td >
< button type = "button" class = "sub" >-</ button >
< input type = "text" name = "" value = "1" class = "num" >
< button type = "button" class = "add" >+</ button >
</ td >
< td class = "small_total" >¥100.30</ td >
< td class = "delete" >删除</ td >
</ tr >
< tr >
< td >< input type = "checkbox" class = "ed" /></ td >
< td >空调</ td >
< td class = "price" >¥1000.99</ td >
< td >
< button type = "button" class = "sub" >-</ button >
< input type = "text" name = "" value = "1" class = "num" >
< button type = "button" class = "add" >+</ button >
</ td >
< td class = "small_total" >¥1000.99</ td >
< td class = "delete" >删除</ td >
</ tr >
</ tbody >
</ table >
< div >
< span >已选< span style = "color: red;" class = "num_sum" >1</ span >件商品</ span >
< span >总计:</ span >
< span class = "sum" style = "color: red;" >0</ span >
< div >< span style = "color: red;" class = "delSome" >删除选中商品</ span >
< span style = "color: red;" class = "delAll" >清空购物车</ span >
</ div >
</ div >
</ body >
</ html >
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JS:
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//里面三个小的复选按钮选中状态跟着 全选按钮走
//因为checked是复选框的固有属性,此时利用prop()获取和设置该属性
$( function () {
getSum();
$( ".checkAll" ).change( function () {
// console.log($(this).prop("checked"));//全选按钮的状态
$( ".ed,.checkAll" ).prop( "checked" , $( this ).prop( "checked" ));
getSum();
if ($( ".ed,.checkAll" ).prop( "checked" )) {
//如果全选,让所有商品添加类名(背景颜色)
$( ".tab tbody" ).children().addClass( "current" );
} else {
$( ".tab tbody" ).children().removeClass( "current" );
}
})
//如果所有小按钮的个数都被选了,全选按钮就选上,如果小按钮没有被选上,则全选按钮就不选上
//:checked选择器,查找本选中的表单元素
$( ".ed" ).change( function () {
// console.log($(".ed:checked").length);//小复选框选中的个数
// console.log($(".ed").length);
//console.log($(this).prop("checked"));
if ($( ".ed:checked" ).length === $( ".ed" ).length) {
$( ".checkAll" ).prop( "checked" , true );
} else {
$( ".checkAll" ).prop( "checked" , false );
}
getSum();
if ($( this ).prop( "checked" )) {
$( this ).parents( "tr" ).addClass( "current" );
} else {
$( this ).parents( "tr" ).removeClass( "current" );
}
})
$( ".add" ).click( function () {
let n = parseInt($( this ).siblings( ".num" ).val());
//console.log(n);
n++;
$( this ).siblings( ".num" ).val(n);
let price = $( this ).parent().siblings( ".price" ).html();
price = price.substr(1);
//console.log(price);
$( this ).parent().siblings( ".small_total" ).text( "¥" + (n * price).toFixed(2));
getSum();
})
$( ".sub" ).click( function () {
let n = parseInt($( this ).siblings( ".num" ).val());
//console.log(n);
if (n === 1) {
return false ;
}
n--;
$( this ).siblings( ".num" ).val(n);
let price = $( this ).parent().siblings( ".price" ).html();
price = price.substr(1);
//console.log(price);
$( this ).parent().siblings( ".small_total" ).text( "¥" + (n * price).toFixed(2));
getSum();
})
//用户也可以直接修改表单num里面的值(小bug),同样计算小计
$( ".num" ).change( function () {
let n = $( this ).val();
let price = $( this ).parent().siblings( ".price" ).html();
price = price.substr(1);
$( this ).parent().siblings( ".small_total" ).text( "¥" + (n * price).toFixed(2));
getSum();
})
function getSum() {
let count = 0; //计算总件数
let money = 0; //计算总价钱
$( ".num" ).each( function (index) {
if ($( ".ed" ).eq(index).prop( "checked" ) == true ) {
count += parseInt($( ".num" ).eq(index).val());
money += parseFloat($( ".small_total" ).eq(index).text().substr(1));
}
})
$( ".num_sum" ).html(count);
$( ".sum" ).html(money.toFixed(2));
}
//删除商品模块
//点击删除之后一定是删除当前的商品,所以从$(this)出发
$( ".delete" ).click( function () {
//删除的是当前的商品
$( this ).parent().remove();
$( ".ed" ).change();
getSum();
clearCheckAll();
})
//删除选定的商品:小的复选框如果选中就删除对应的商品
$( ".delSome" ).click( function () {
//删除的是选中的商品
$( ".ed:checked" ).parent().parent().remove();
getSum();
clearCheckAll();
})
//清空购物车
$( ".delAll" ).click( function () {
$( ".tab tbody" ).empty();
getSum();
clearCheckAll();
})
function clearCheckAll() {
if ($( ".tab tbody" )[0].innerText == '' ) {
$( ".checkAll" ).prop( "checked" , false );
}
}
})
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_47339511/article/details/112360362