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javascript - 如何在 Django 中实现 JavaScript？

问题描述

我正在创建一个基本的待办事项网络应用程序，我正在努力完成最后一部分——在 Django 中实现 JavaScript。

我在静态文件夹中创建了一个单独.js的文件。

// Create a "close" button and append it to each list item
var myNodelist = document.getElementsByTagName("LI");
var i;
for (i = 0; i < myNodelist.length; i++) {
  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  myNodelist[i].appendChild(span);
}

// Click on a close button to hide the current list item
var close = document.getElementsByClassName("close");
var i;
for (i = 0; i < close.length; i++) {
  close[i].onclick = function() {
    var div = this.parentElement;
    div.style.display = "none";
  }
}

// Add a "checked" symbol when clicking on a list item
var list = document.querySelector('ul');
list.addEventListener('click', function(ev) {
  if (ev.target.tagName === 'LI') {
    ev.target.classList.toggle('checked');
  }
}, false);

// Create a new list item when clicking on the "Add" button
function newElement() {
  var li = document.createElement("li");
  var inputValue = document.getElementById("myInput").value;
  var t = document.createTextNode(inputValue);
  li.appendChild(t);
  if (inputValue === '') {
    alert("You must write something!");
  } else {
    document.getElementById("myUL").appendChild(li);
  }
  document.getElementById("myInput").value = "";

  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  li.appendChild(span);

  for (i = 0; i < close.length; i++) {
    close[i].onclick = function() {
      var div = this.parentElement;
      div.style.display = "none";
    }
  }
}
<!DOCTYPE html>
<html lang="en">
    <head>
        {% load static %}
        <link rel="stylesheet" href="{% static 'js/app.js' %}"
        <meta charset="utf-8">
        <meta name="description" content="To-Do Web Application">
        <meta name="author" content="Wesley Ross">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <title>To-Do Web Application</title>
    <style>
        body {
            font-family: sans-serif;
            text-align: center;
        }
        * {
            box-sizing: border-box;
        }
        ul {
            margin: 0;
            padding: 0;
        }
        ul li {
            cursor: pointer;
            position: relative;
            padding: 12px 8px 12px 40px;
            background: #eee;
            font-size: 18px;
            transition: 0.2s;
          
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
            user-select: none;
        }
        ul li:nth-child(odd) {
            background: #f9f9f9;
        }
        ul li:hover {
            background: #ddd;
        }
        ul li.checked {
            background: #888;
            color: #fff;
            text-decoration: line-through;
        }
        ul li.checked::before {
            content: '';
            position: absolute;
            border-color: #fff;
            border-style: solid;
            border-width: 0 2px 2px 0;
            top: 10px;
            left: 16px;
            transform: rotate(45deg);
            height: 15px;
            width: 7px;
        }
        .close {
            position: absolute;
            right: 0;
            top: 0;
            padding: 12px 16px 12px 16px;
        }  
        .close:hover {
            background-color: #f44336;
        }
        .header {
            color: white;
            background-color: #ff0000;
            padding: 30px 40px;
            color: white;
            text-align: center;
        }
        .header:after {
            content: "";
            display: table;
            clear: both;
        }
        input {
            margin: 0;
            border: none;
            border-radius: 0;
            width: 75%;
            padding: 10px;
            float: left;
            font-size: 16px;
        }
        .addBtn {
            padding: 10px;
            width: 25%;
            background: #d9d9d9;
            color: #555;
            float: left;
            text-align: center;
            font-size: 16px;
            cursor: pointer;
            transition: 0.3s;
            border-radius: 0;
        }
        .addBtn:hover {
            background-color: #bbb;
        }
    </style>
    <body>
        <h1>Welcome {{user|title}}!</h1>
        <div id="myDIV" class="header">
            <h2>My To Do List</h2>
            <input type="text" id="myInput" placeholder="Enter Task...">
            <span onclick="newElement()" class="addBtn">Add</span>
        </div>
          
        <ul id="myUL">
            <li></li>
            <li class="checked">Listen to Inspirational audio or music</li>
            <li class="checked">Read Bible scripture</li>
            <li>Coding: blogs or videos</li>
            <li>Coding: CodeWars</li>
            <li>Pray</li>
            <li>Read book: Unlocking the Bible</li>
        </ul>
    </body>
</html>

我是 Django 的新手，所以我可能缺少一些东西。

标签： javascriptdjango

解决方案

JavaScript 代码放在<script>标签内，所以不要link写：

<script src="{% static 'js/app.js' %}"><script>

并且为了良好的实践{% load static %}，在模板的开头编写，如果你不关心运行你的js 代码，当页面开始加载时，只需将你的脚本放在标签的末尾body- 这对用户体验更好。

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