私は JavaScript の初心者で、修正方法がわからないというエラーが表示されます。私は得てU.$('theForm').onsubmit = setHandlers; is not a function
います。私はそれがおそらく何かばかげていることを知っています。誰かが助けることができれば、それは素晴らしいことです! これが私のコードです。
function reportEvent(e) {
'use strict';
if (typeof e == 'undefined') e = window.event;
var target = e.target || e.srcElement;
var msg = target.nodeName + ': ' + e.type + '\n';
U.$('output').value += msg;
} // End of reportEvent() function.
function setHandlers(e) {
'use strict';
var event = ['mouseover', 'mouseout', 'click', 'keypress', 'blur'];
for (var i = 0, count = events.length; i < count; i++) {
var checkbox = U.$(events[i]);
if (checkbox.checked) {
U.addEvent(document, events[i], reportEvent);
} else {
U.removeEvent(document, evets[i], reportEvent);
}
} // End of FOR loop.
U.$('output').value = '';
return false;
} //End of setHandlers9 function.
window.onload = function() {
'use strict';
U.$('theForm').onsubmit = setHandlers;
};
ここに私の html ここに私の html があります。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Reporting Events</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 8.7 - events.html -->
<form action="#" method="post" id="theForm">
<fieldset><legend>Reporting Events</legend>
<p>Select the events you want to listen for:</p>
<div><label for="mouseover">mouseover</label><input type="checkbox" name="mouseover" id="mouseover" value="mouseover"></div>
<div><label for="mouseout">mouseout</label><input type="checkbox" name="mouseout" id="mouseout" value="mouseout"></div>
<div><label for="click">click</label><input type="checkbox" name="click" id="click" value="click"></div>
<div><label for="keypress">keypress</label><input type="checkbox" name="keypress" id="keypress" value="keypress"></div>
<div><label for="blur">blur</label><input type="checkbox" name="blur" id="blur" value="blur"></div>
<div><input type="submit" value="Submit" id="submit"></div>
<div><label for="output">Output</label><textarea name="output" id="output" disabled></textarea></div>
</fieldset>
</form>
<script src="js/utilities.js"></script>
<script src="js/events.js"></script>
</body>
</html>
これは utility.js です
var U = {
$: function(id) {
'use strict';
if (typeof id == 'string') {
return document.getElementById(id);
}
}, // End of $() function.
setText: function(id, message) {
'use strict';
if ( (typeof id == 'string')
&& (typeof message == 'string') ) {
var output = this.$(id);
if (!output) return false;
if (output.textContent !== undefined) {
output.textContent = message;
} else {
output.innerText = message;
}
return true;
} // End of main IF.
}, // End of setText() function.
addEvent: function(obj, type, fn) {
'use strict';
if (obj && obj.addEventListener) {
obj.addEventListener(type, fn, false);
} else if (obj && obj.attachEvent) {
obj.attachEvent('on' + type, fn);
}
}, // End of addEvent() function.
removeEvent: function(obj, type, fn) {
'use strict';
if (obj && obj.removeEventListener) {
obj.removeEventListener(type, fn, false);
} else if (obj && obj.detachEvent) {
obj.detachEvent('on' + type, fn);
}
} // End of removeEvent() function.
}; // End of U declaration.
var U = { /* functions */ };