题解 | #购物车#
购物车
https://www.nowcoder.com/practice/3b4a342351ce483e813e5588446fc1f8
function add(items) {
let tbody = document.getElementsByTagName('tbody')[0];
let content = '';
items.forEach(item => {
content += `<tr><td>${item.name}</td><td>${item.price.toFixed(2)}</td><td><a href="javascript:void(0);">删除</a></td></tr>`
});
tbody.innerHTML += content;
this.getAmount();
}
function bind() {
let that = this;
let tbody = document.getElementsByTagName('tbody')[0];
tbody.addEventListener('click', function (e) {
if (e.target.nodeName === 'A') {
e.target.parentElement.parentElement.remove();
that.getAmount();
}
});
}
function getAmount() {
let tbody = document.getElementsByTagName('tbody')[0];
let all = tbody.getElementsByTagName('tr');
let tfoot = document.getElementsByTagName('tfoot')[0];
let amount = tfoot.getElementsByTagName('tr')[0].getElementsByTagName('td')[0];
let res = Array.from(all).reduce((tmp, item) => tmp + Number(item.children[1].innerHTML), 0);
amount.innerHTML = `${res.toFixed(2)}(${all.length}件商品)`
}
this.bind();
邪门，金额总计我用汇总就能在牛客跑通，换成for...of金额想家啊就过不去#建议牛客在专项练习上进行改进#
