本地存储和 window.location.href.replace
Local storage and window.location.href.replace
我和我的课程伙伴正在尝试编写代码，当单击订购按钮时，它应该保存在本地存储中并重定向到订购页面。
到目前为止，当我们点击订单时，它没有在 google 开发人员工具的 application/local 存储部分中注册，因此不会重定向到新页面。
我们放置了一个事件监听器来显示 console.log 当我们点击时，只是为了确保按钮是有序的（这部分并不重要）。
我们还使用在线 javascript 验证器来消除错别字和错误。
我们还需要 order.html 文件中的任何特定代码来与本地存储交互吗？
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>grc</title>
<link rel="stylesheet" href="css/style.css" type="text/css">
</head>
<body>
<header>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="groceries.html">Groceries</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</header>
<main>
<aside><img class="imgclass1" src="images/rounded logo.png" alt="Grocer Nigeria"></aside>
<article class="preinventory">
<section class="columns-desktop">
<div class="inventory">
<img class="sales" src="images/tomato.jpg" alt="Tomato"/>
<div class="columns">
<div class="title">Tomato</div>
<div class="Price">0</div>
</div>
<p class="Desc"> Our Tomato2</p>
<button data-order="Tomato2">Order</button>
</div>
<div class="inventory">
<img class="sales" src="images/tomato.jpg" alt="Tomato"/>
<div class="columns">
<div class="title">Tomato</div>
<div class="Price">0</div>
</div>
<p class="desc"> Our Tomato</p>
<button data-order="Tomato">Order</button>
</div>
</section>
</article>
</main>
<footer>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="groceries.html">Groceries</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</footer>
<script type="text/javascript">
window.addEventListener("DOMcontentLoaded", function(e){
const orderButtons= document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button){
button.addEventListener("click",function(e){
const button= e.currentTarget;
const container= button.parentNode;
const order={
id:button.getAttribute("data-order"),
title: container.querySelector(".title").innerText,
price1: container.querySelector(".Price").innerText,
desc:container.querySelector(".desc").innerText
};
localStorage.setItem('order', JSON.stringify(order));
const url = window.location.href.replace("grc.html","order.html");
window.location.href = url;
});
});
});
window.addEventListener("DOMcontentLoaded", function(e){
console.log("The page is loaded.");
});
const orderButtons= document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button){
button.addEventListener("click", function(e){
console.log("The button was clicked.");
});
});
</script>
</body>
</html>
**Below is what I see when I run the live server**
<!-- Code injected by live-server -->
<script type="text/javascript">
// <![CDATA[ <-- For SVG support
if ('WebSocket' in window) {
(function() {
function refreshCSS() {
var sheets = [].slice.call(document.getElementsByTagName("link"));
var head = document.getElementsByTagName("head")[0];
for (var i = 0; i < sheets.length; ++i) {
var elem = sheets[i];
head.removeChild(elem);
var rel = elem.rel;
if (elem.href && typeof rel != "string" || rel.length == 0 || rel.toLowerCase() == "stylesheet") {
var url = elem.href.replace(/(&|\?)_cacheOverride=\d+/, '');
elem.href = url + (url.indexOf('?') >= 0 ? '&' : '?') + '_cacheOverride=' + (new Date().valueOf());
}
head.appendChild(elem);
}
}
var protocol = window.location.protocol === 'http:' ? 'ws://' : 'wss://';
var address = protocol + window.location.host + window.location.pathname + '/ws';
var socket = new WebSocket(address);
socket.onmessage = function(msg) {
if (msg.data == 'reload') window.location.reload();
else if (msg.data == 'refreshcss') refreshCSS();
};
console.log('Live reload enabled.');
})();
}
// ]]>
</script>
</body>
</html>
DOMcontentLoaded 事件在代码挂钩它时已经触发。
勾选这个post；
Code inside DOMContentLoaded event not working
这里的问题是事件 DOMContentLoaded 没有触发。
以下是我如何使用 load 事件；对于重定向，我只是使用 URL search params（因为我不知道您的其他 html 文件是什么样的），尽管您可以使用其他 html 文件。
片段如下
但是请注意：Whosebug 不允许 JavaScript 到 运行，并且会抛出一个 securityError。要 运行 此代码，您必须将其保存在您的计算机上或使用 jsFiddle
function continue_ordering() {
alert("Now continue with order");
};
window.addEventListener("load", function(e) {
const orderButtons = document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button) {
button.addEventListener("click", function(e) {
const button = e.currentTarget;
const container = button.parentNode;
const id = button.getAttribute("data-order");
const order = {
id,
title: container.querySelector(".title").innerText,
price1: container.querySelector(".price").innertext,
desc: container.querySelector(".desc").innerText
};
localStorage.setItem("order-" + id, JSON.stringify(order));
window.location.search = "?ordering=true&order-id=" + id;
});
});
});
window.addEventListener("load", function(e) {
if (window.location.search.search("ordering=true") != -1) {
console.log("User is ordering");
const params = new URLSearchParams(location.search)
const id = params.get("order-id");
if (!id || id == null) throw "There is no order id, error. Remove the ?ordering=true from the url and try again.";
const order_info = JSON.parse(localStorage.getItem("order-" + id));
if (!order_info) throw "Order information is not present: try ordering again. Remove the ?ordering=true from the url";
console.log("Order info is:\n", order_info);
document.getElementById("ordering").removeAttribute("hidden");
return;
};
document.getElementById("make-order").removeAttribute("hidden");
});
const orderButtons = document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button) {
button.addEventListener("click", function(e) {
console.log("The button was clicked.");
});
});
<div id="make-order" hidden>
<button data-order="test">Order</button>
<div class="title">This is the title</div>
<div class="price">130 USD</div>
<div class="desc">Lorem</div>
</div>
<div id="ordering" hidden>
<h1>
You are ordering.
<br> Choose
<a href="javascript:location.search='';">Stop ordering</a> Or <a href="javascript:continue_ordering();">Continue with order</a>
</h1>
</div>
我和我的课程伙伴正在尝试编写代码，当单击订购按钮时，它应该保存在本地存储中并重定向到订购页面。
到目前为止，当我们点击订单时，它没有在 google 开发人员工具的 application/local 存储部分中注册，因此不会重定向到新页面。
我们放置了一个事件监听器来显示 console.log 当我们点击时，只是为了确保按钮是有序的（这部分并不重要）。
我们还使用在线 javascript 验证器来消除错别字和错误。
我们还需要 order.html 文件中的任何特定代码来与本地存储交互吗？
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>grc</title>
<link rel="stylesheet" href="css/style.css" type="text/css">
</head>
<body>
<header>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="groceries.html">Groceries</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</header>
<main>
<aside><img class="imgclass1" src="images/rounded logo.png" alt="Grocer Nigeria"></aside>
<article class="preinventory">
<section class="columns-desktop">
<div class="inventory">
<img class="sales" src="images/tomato.jpg" alt="Tomato"/>
<div class="columns">
<div class="title">Tomato</div>
<div class="Price">0</div>
</div>
<p class="Desc"> Our Tomato2</p>
<button data-order="Tomato2">Order</button>
</div>
<div class="inventory">
<img class="sales" src="images/tomato.jpg" alt="Tomato"/>
<div class="columns">
<div class="title">Tomato</div>
<div class="Price">0</div>
</div>
<p class="desc"> Our Tomato</p>
<button data-order="Tomato">Order</button>
</div>
</section>
</article>
</main>
<footer>
<nav>
<ul>
<li><a href="index.html">Home</a></li>
<li><a href="groceries.html">Groceries</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</nav>
</footer>
<script type="text/javascript">
window.addEventListener("DOMcontentLoaded", function(e){
const orderButtons= document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button){
button.addEventListener("click",function(e){
const button= e.currentTarget;
const container= button.parentNode;
const order={
id:button.getAttribute("data-order"),
title: container.querySelector(".title").innerText,
price1: container.querySelector(".Price").innerText,
desc:container.querySelector(".desc").innerText
};
localStorage.setItem('order', JSON.stringify(order));
const url = window.location.href.replace("grc.html","order.html");
window.location.href = url;
});
});
});
window.addEventListener("DOMcontentLoaded", function(e){
console.log("The page is loaded.");
});
const orderButtons= document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button){
button.addEventListener("click", function(e){
console.log("The button was clicked.");
});
});
</script>
</body>
</html>
**Below is what I see when I run the live server**
<!-- Code injected by live-server -->
<script type="text/javascript">
// <![CDATA[ <-- For SVG support
if ('WebSocket' in window) {
(function() {
function refreshCSS() {
var sheets = [].slice.call(document.getElementsByTagName("link"));
var head = document.getElementsByTagName("head")[0];
for (var i = 0; i < sheets.length; ++i) {
var elem = sheets[i];
head.removeChild(elem);
var rel = elem.rel;
if (elem.href && typeof rel != "string" || rel.length == 0 || rel.toLowerCase() == "stylesheet") {
var url = elem.href.replace(/(&|\?)_cacheOverride=\d+/, '');
elem.href = url + (url.indexOf('?') >= 0 ? '&' : '?') + '_cacheOverride=' + (new Date().valueOf());
}
head.appendChild(elem);
}
}
var protocol = window.location.protocol === 'http:' ? 'ws://' : 'wss://';
var address = protocol + window.location.host + window.location.pathname + '/ws';
var socket = new WebSocket(address);
socket.onmessage = function(msg) {
if (msg.data == 'reload') window.location.reload();
else if (msg.data == 'refreshcss') refreshCSS();
};
console.log('Live reload enabled.');
})();
}
// ]]>
</script>
</body>
</html>
DOMcontentLoaded 事件在代码挂钩它时已经触发。
勾选这个post；
Code inside DOMContentLoaded event not working
这里的问题是事件 DOMContentLoaded 没有触发。
以下是我如何使用 load 事件；对于重定向，我只是使用 URL search params（因为我不知道您的其他 html 文件是什么样的），尽管您可以使用其他 html 文件。
片段如下
但是请注意：Whosebug 不允许 JavaScript 到 运行，并且会抛出一个 securityError。要 运行 此代码，您必须将其保存在您的计算机上或使用 jsFiddle
function continue_ordering() {
alert("Now continue with order");
};
window.addEventListener("load", function(e) {
const orderButtons = document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button) {
button.addEventListener("click", function(e) {
const button = e.currentTarget;
const container = button.parentNode;
const id = button.getAttribute("data-order");
const order = {
id,
title: container.querySelector(".title").innerText,
price1: container.querySelector(".price").innertext,
desc: container.querySelector(".desc").innerText
};
localStorage.setItem("order-" + id, JSON.stringify(order));
window.location.search = "?ordering=true&order-id=" + id;
});
});
});
window.addEventListener("load", function(e) {
if (window.location.search.search("ordering=true") != -1) {
console.log("User is ordering");
const params = new URLSearchParams(location.search)
const id = params.get("order-id");
if (!id || id == null) throw "There is no order id, error. Remove the ?ordering=true from the url and try again.";
const order_info = JSON.parse(localStorage.getItem("order-" + id));
if (!order_info) throw "Order information is not present: try ordering again. Remove the ?ordering=true from the url";
console.log("Order info is:\n", order_info);
document.getElementById("ordering").removeAttribute("hidden");
return;
};
document.getElementById("make-order").removeAttribute("hidden");
});
const orderButtons = document.querySelectorAll("button[data-order]");
orderButtons.forEach(function(button) {
button.addEventListener("click", function(e) {
console.log("The button was clicked.");
});
});
<div id="make-order" hidden>
<button data-order="test">Order</button>
<div class="title">This is the title</div>
<div class="price">130 USD</div>
<div class="desc">Lorem</div>
</div>
<div id="ordering" hidden>
<h1>
You are ordering.
<br> Choose
<a href="javascript:location.search='';">Stop ordering</a> Or <a href="javascript:continue_ordering();">Continue with order</a>
</h1>
</div>