.parents()
In this chapter you will learn:
- Syntax and Description for .parents()
- Count the parent elements by tag name
- How to map parent elements to get all their names
- Find all unique div parent elements of each span
Syntax and Description
.parents([selector])
gets the ancestors of each element in the current set of matched elements,
optionally filtered by a selector.
selector (optional) is
a string containing a selector expression to match elements against.
Its return value is the new jQuery object.
Count the parent elements by tag name
The following code gets DIV parent count
<html><!--from j av a2 s . c o m-->
<head>
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("span").click(function () {
var len = $("span").parents("div").length;
alert(len);
});
});
</script>
</head>
<body>
<body>
<div>
<div><span>Hello ja va2s.com</span></div>
</div>
</body>
</html>
Map the parents
The following code gets parents and then uses the map function to get all of their tag names.
<html><!--from ja v a 2 s.c o m-->
<head>
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var parentEls = $("span").parents()
.map(function () {
return this.tagName;
})
.get().join(", ");
$("span").append(parentEls);
});
</script>
</head>
<body>
<body>
<div>
<p>
<span>
</span>
</p>
</div>
</body>
</html>
Find all unique div parent elements of each span
Click to find all unique div parent elements of each span.
<html><!--from j a va 2s .c o m-->
<head>
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
function showParents() {
var len = $("span")
.parents("div")
.css("border", "2px red solid")
.length;
$("b").text("Unique div parents: " + len);
}
$("span").click(function () {
showParents();
});
});
</script>
<style>
.selected { color:blue; }
</style>
</head>
<body>
<body>
<div>
<div><span>span</span></div>
<span>span</span>
</div>
<div>
<span>java2s.com</span>
</div>
<b></b>
</body>
</html>
Next chapter...
What you will learn in the next chapter: