JavaScript Tutorial/jQuery/Event Key
Содержание
30. Check key code
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
if (e.which > 65 ) {
alert(e.which);
}
});
});
</script>
</head>
<body>
<body>
<input type="text" />
</body>
</html></source>
30. Convert key code to char
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
Add text -
</body>
</html></source>
30. Document key down event
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(window).keydown(function(event){
alert(event.keyCode);
switch (event.keyCode) {
}
});
}); </script> </head> <body> <body>
<input type="text" /> focus event fire
</body>
</html></source>
30. Get key code
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
Add text -
</body>
</html></source>
30. Key pressed event
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keypress(function (e) {
var c = String.fromCharCode(e.which);
$("p").append($("<span/>")).children(":last").append(document.createTextNode(c));
$("div").text(e.which);
});
});
</script>
</head>
<body>
<body>
<input type="text" />
Add text -
</body>
</html></source>
30. Key up event and check the key code
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function (e) {
if (e.which > 65 ) {
alert(e.which);
}
});
});
</script>
</head>
<body>
<body>
<input type="text" />
</body>
</html></source>
30. Key up event and get the typed value
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").keyup(function () {
var value = $(this).val();
$("div").text(value);
}).keyup();
});
</script>
</head>
<body>
<body>
<input type="text" value="some text"/>
</body>
</html></source>
30. To perform an action when the escape key has been released:
<source lang="javascript">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).keyup(function(event){
if (event.keyCode == 27) {
alert("escaped!");
}
});
}); </script>
<style>
div.dbl { background:yellow;color:black; }
</style>
</head> <body> <body>
<input type="text" /> focus fire
<input type="password" /> focus fire
</body>
</html></source>
