我一直在努力学习nodejs
this NodeJs Youtube Tutorial
.
我已经和
Fetch API
几个月从wordpress和google的后台获取数据。
youtube播放列表的最后一段视频是关于创建一个带有nodejs和npm的express、ejs和body解析器的待办事项列表应用程序。
然而,
at part 4 of the To do list app
,这个“老师”使用jquery和ajax将数据发布到nodejs(
His jQuery Code Snippet
)由于我只使用fetch()来处理ajax post请求,所以我想用普通javascript继续使用这个方法。
我的ejs文件名为todo.ejs,存储页面的html模板如下所示:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="/assets/style.css">
<!-- Works because of express middleware.
Since we stored the public folder as a static folder,
we can request anything within that folder from the url, such as
127.0.0.1:3000/assets/styles.css
-->
<title>Todo List</title>
</head>
<body>
<h1>My Todo List</h1>
<div id="todo-table">
<form>
<input type="text" name="item" placeholder="Add new item..." required>
<button type="submit">Add Item</button>
</form>
<ul>
<% todos.forEach(todoList =>{ %>
<li> <%= todoList.item %> </li>
<% }) %>
</ul>
</div>
</body>
<script src="/assets/script.js"></script>
</html>
我的script.js(链接到todo.ejs页面)如下所示:
document.addEventListener("DOMContentLoaded", function (event) {
let submitButton = document.querySelector("button");
let textField = document.querySelector("input");
submitButton.addEventListener("click", addItem);
function addItem() {
let newItem = textField.value;
let todo = {
item: newItem
};
fetch("/todo", {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(todo)
}).then((res) => res.json())
.then((data) => console.log(data))
.catch((err) => console.log(err))
}
});
处理所有get/post请求的控制器todocontroller.js如下所示:
let bodyParser = require("body-parser");
let urlencodedParser = bodyParser.urlencoded({ extended: false });
// Have some items already in place
let data = [{item: "Get milk"} , {item: "Walk dog"} , {item: "Clean kitchen"}];
module.exports = function (app) {
//Handle get data requests
app.get("/todo", function (req, res) {
res.render("todo", {todos: data});
});
//Handle post data requests (add data)
app.post("/todo", urlencodedParser, function (req, res) {
console.log(req.body);
});
//Handle delete data requests
app.delete("/todo", function (req, res) {
});
};
现在,每当我用一些文本填充输入字段并点击enter按钮时,我的终端输出空对象:
基于这些空对象,一定是我的post请求没有被正确地接受/发送。
我的文件树如下所示:
有人可能(可能是显而易见的)对此有答案吗?
(我知道我只需要抓住他的jquery ajax代码片段就可以了,但我急切地想用普通javascript来理解它)
提前感谢大家抽出时间来帮助我:)
