JavaScript DHTML/jQuery/attr
Содержание
- 1 Add attribute and clear attribute
- 2 attr(key, fn)
- 3 attr(key, value) set a single property to a value, on all matched elements.
- 4 attr(name): access a property on the first matched element.
- 5 Disable all form input controls
- 6 Disable input control
- 7 Finds the title attribute of the first in the page.
- 8 Get attribute from tag
- 9 Get input control type
- 10 Set attribute with the returned function value
- 11 Set Image URL title alt
- 12 Sets src attribute from title attribute on the image.
Add attribute and clear attribute
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(
function() {
$("div").hover(
function() {
$(this).attr("id", "justAdd");
$(this).text("This element\"s ID is: " + $(this).attr("id"));
},
function() {
$(this).attr("id", "");
$(this).text("This element\"s ID has been removed.");
}
);
}
);
$("a").removeAttr("title");
</script>
<style type="text/css">
div {
width: 350px;
padding: 10px;
border: 1px solid rgb(200, 200, 200);
background: #93cdf9;
margin: 5px;
}
div#justAdd {
background: #6faddd;
}
</style>
</head>
<body>
<div>Mouse over to change this element"s id.</div>
</body>
</html>
attr(key, fn)
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("div").attr("id", function (arr) {
return "div-id" + arr;
})
.each(function () {
$("span", this).html("(ID = "<b>" + this.id + "</b>")");
});
});
</script>
</head>
<body>
<body>
<div>A<span></span></div>
<div>B<span></span></div>
<div>C<span></span></div>
</body>
</html>
attr(key, value) set a single property to a value, on all matched elements.
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button:gt(1)").attr("disabled","disabled");
});
</script>
</head>
<body>
<body>
<button>0th Button</button>
<button>1st Button</button>
<button>2nd Button</button>
</body>
</html>
attr(name): access a property on the first matched element.
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var title = $("em").attr("title");
$("div").text(title);
});
</script>
</head>
<body>
<body>
<em title="title value">
<div></div>
</body>
</html>
Disable all form input controls
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").attr("disabled", "disabled");
});
</script>
</head>
<body>
<body>
<div>
<input type="checkbox" name="a" />
<span>A</span>
</div>
<div>
<input type="checkbox" name="b" />
<span>B</span>
</div>
<div>
<input type="checkbox" name="c" checked="checked" />
<span>C</span>
</div>
</body>
</html>
Disable input control
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("input").attr("disabled", "disabled");
});
</script>
</head>
<body>
<form>
<input type="checkbox" name="a" />
<span>A</span>
<input type="checkbox" name="b" />
<span>B</span>
<input type="checkbox" name="c" checked="checked" />
<span>C</span>
</form>
</body>
</html>
Finds the title attribute of the first in the page.
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var title = $("em").attr("title");
$("div").text(title);
});
</script>
</head>
<body>
<body>
<em title="title value">
<div></div>
</body>
</html>
Get attribute from tag
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var title = $("em").attr("title");
$("div").text(title);
});
</script>
</head>
<body>
<em title="title value">em</em>
<div></div>
</body>
</html>
Get input control type
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#exampleTable").find("td").each(function(i, el) {
var inputEl = $(el).children().get(0);
$(el).before("<td>Added " + $(inputEl).attr("type") + "</td>");
})
});
</script>
</head>
<body>
<form>
<table id="exampleTable">
<tr>
<th>
Type
</th>
<th>
Element
</th>
</tr>
<tr>
<td>
<input type="button" value="Input Button"/>
</td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
</tr>
</table>
</form>
</body>
</html>
Set attribute with the returned function value
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(
function() {
$("li").attr(
"id",
function() {
return "tmp" + $(this).text();
}
);
}
);
</script>
<style type="text/css">
ul {
list-style: none;
padding: 0;
margin: 0;
}
ul li {
margin: 3px;
padding: 3px;
}
li#tmpA {
background: #d7b05b;
}
li#tmpB {
background: #d3988a;
}
li#tmpC {
background: #8ad3a6;
}
li#tmpD {
background: #8aa9d3;
}
</style>
</head>
<body>
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
<li>D</li>
</ul>
</body>
</html>
Set Image URL title alt
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("img").attr({
src: "http://wbex.ru/style/logo.png",
title: "wbex.ru",
alt: "Logo"
});
$("div").text($("img").attr("alt"));
});
</script>
</head>
<body>
<body>
<img />
<div></div>
</body>
</html>
Sets src attribute from title attribute on the image.
<html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("img").attr("src", function() {
return "/images/" + this.title;
});
});
</script>
</head>
<body>
<body>
<img title="a.gif"/>
</body>
</html>