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How to find a number of anchors in a document in JavaScript?
This article discusses about how to find the number of anchors in a document in JavaScript. The anchor tag is a part of HTML DOM elements. The anchor property is a read only property that returns a list of anchor tags inside a document. The anchor object is represented as <a>.
There are two ways to get the length of the anchors object. One way is to use the anchors.length property that returns the number of anchor tags in a document. The other way is to use getElementByTagName method to access the anchor tag and use the length property. Both internally counts the number of <a> tags inside a document.
Syntax
The syntax to find the number of anchors in a document is shown below.
document.anchors.length or document.getElementsByTagName("a").length
Let us see the examples of these ?
Example 1
In the following example, three anchor tags were used and their length was displayed using document.anchors.length as shown in the output.
<html>
<body>
<a name="Tutor">Tutorix</a><br>
<a name="Totorial">Tutorialspoint</a><br>
<a name="Totorials">Tutorialspoint private ltd</a><br>
<script>
document.write(document.anchors.length);
</script>
</body>
</html>
On executing the above code, the following output is generated.
Example 2
The following is an example program to find the number of anchors in a document.
<html>
<head>
<title>How to find the number of anchors in a document in JavaScript</title>
</head>
<h3>To find the number of anchor tags in a document</h3>
<body style = "text-align:center;">
<p>The most popular websites that are used by young generation are :</p>
<a href="#">Google</a> <br/>
<a href="#">Facebook</a> <br/>
<a href="#">Instagram</a> <br/>
<p id="text1"></p>
<script type="text/javascript">
document.getElementById("text1").innerHTML = "The number of anchor tags is : "+document.getElementsByTagName("a").length;
</script>
</body>
</html>
On executing the above code, the following output is generated.
Example 3
Following is an example program to count the number of anchor tags inside a particular div tag.
<!DOCTYPE HTML>
<html>
<head>
<title>How to find the number of anchors in a document in JavaScript</title>
<head>
<h3>To find the number of anchor tags in a document</h3>
<body style = "text-align:center;">
<p>The most popular websites that are used by young generation are :</p>
<div id="websites">
<a href="#">Google</a> <br/>
<a href="#">Facebook</a> <br/>
<a href="#">Instagram</a> <br/>
</div>
<p>The most popular cars are :</p>
<div id="Cars">
<a href="#">BMW</a> <br/>
<a href="#">AUDI</a> <br/>
<a href="#">RANGE ROVER</a> <br/>
<a href="#">MARUTI SUZUKI</a> <br/>
</div>
<p id="text1"></p>
<script type="text/javascript">
var count = document.getElementById("Cars").getElementsByTagName("a").length;
document.getElementById("text1").innerHTML = "The number of anchor tags for the mentioned div tag 'Cars' is : "+count;
</script>
</body>
</html>
On executing the above code, the following output is generated.
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