Question

我老师到底是什么意思？我对HTML的经验很少，所以我不知道该怎么办？如果没有表单元素，它会不会停止工作？整个说明说： “删除表单元素并在其位置放置一个具有唯一ID的div。不要忘记关闭div元素.为Delete Task添加第二个按钮。将两个按钮的”submit“类型更改为”button“并给出每一个都是一个独特的身份。“

(function(){
    
	// Variable that stores the tasks:
    var tasks = []; 

	// Function called when the form is submitted.
	// Function adds a task to the global array.
    function addTask() {
        'use strict';
        var task = document.getElementById('task');
        var output = document.getElementById('output');
        var message = '';

        if (task.value) {
            tasks.push(task.value);
            message = '<h2>To-Do</h2><ol>';
            for (var i = 0, count = tasks.length; i < count; i++) {
                message += '<li>' + tasks[i] + '</li>';
            }
            message += '</ol>';
            output.innerHTML = message;        
        } // End of task.value IF.

	    // Return false to prevent submission:
        return false;

    } // End of addTask() function.

    // Initial setup:
    function init() {
        'use strict';
        document.getElementById('theForm').onsubmit = addTask;
    } // End of init() function.
    window.onload = init;

})();

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>To-Do List</title>
    <!--[if lt IE 9]>
    <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif]-->
    <link rel="stylesheet" href="css/form.css">
</head>
<body>
    <!-- Script 6.5 - task.html -->
    <form action="#" method="post" id="theForm">
        <fieldset><legend>Enter an Item To Be Done</legend>
            <div><label for="task">Task</label><input type="text" name="task" id="task" required></div>
            <input type="submit" value="Add It!" id="submit">
		    <div id="output"></div>
        </fieldset>
    </form>
    <script src="js/todo.js"></script>
</body>
</html>

Answer 1

您需要将事件从onsubmit更改为on，因为表单不再可用。

试试这个：

(function(){
    
	// Variable that stores the tasks:
    var tasks = []; 

	// Function called when the form is submitted.
	// Function adds a task to the global array.
    function addTask() {
        'use strict';
        var task = document.getElementById('task');
        var output = document.getElementById('output');
        var message = '';

        if (task.value) {
            tasks.push(task.value);
            message = '<h2>To-Do</h2><ol>';
            for (var i = 0, count = tasks.length; i < count; i++) {
                message += '<li>' + tasks[i] + '</li>';
            }
            message += '</ol>';
            output.innerHTML = message;        
        } // End of task.value IF.

	    // Return false to prevent submission:
        return false;

    } // End of addTask() function.

    // Initial setup:
    function init() {
        'use strict';
        document.getElementById('submit').onclick = addTask;
    } // End of init() function.
    window.onload = init;

})();

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>To-Do List</title>
    <!--[if lt IE 9]>
    <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
    <![endif]-->
    <link rel="stylesheet" href="css/form.css">
</head>
<body>
    <!-- Script 6.5 - task.html -->
    <form action="#" method="post" id="theForm"
        <fieldset><legend>Enter an Item To Be Done</legend>
            <div><label for="task">Task</label><input type="text" name="task" id="task" required></div>
            <input type="submit" value="Add It!" id="submit">
		    <div id="output"></div>
        </fieldset>
   </form>
    <script src="js/todo.js"></script>
</body>
</html>

删除表单元素并在其位置放置一个具有唯一ID的div？

1 个答案: