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JavaScript Interactive Web Pages with JavaScript Selecting Elements and Adding Events with JavaScript Selecting Elements

Hassan Kotati
Hassan Kotati
3,645 Points
Posted by Hassan Kotati
Hassan Kotati
3,645 Points

Using h1 for TagName

Since we can use "p" as a tag, could we use h1 like the the following? document.getElementsByTagName("h1")[1] I tryed it but it doesn't work

app.js 
var fullName;
var lastName;
index.html 
<!DOCTYPE html>
<html>
<head></head>
<body>
<h1 id="full_name"><span class="first_name">Andrew</span> <span class="last_name">Chalkley</span></h1>

<script src="app.js"></script>
</body>
</html>

2 Answers

Michael Hulet
Michael Hulet
47,913 Points
Michael Hulet
Michael Hulet
47,913 Points

In JavaScript, array indexes start counting from 0. Therefore, to get the first (and only, it seems) h1 element on the page, you would use this code:

//Notice the 0, instead of a 1
document.getElementsByTagName("h1")[0];
Hassan Kotati
Hassan Kotati
3,645 Points
Hassan Kotati
Hassan Kotati
3,645 Points

Isn't "h1" [0] for first_name ? . Otherwise how would we access the first name using h1 Tag?

Michael Hulet
Michael Hulet
47,913 Points
Michael Hulet
Michael Hulet
47,913 Points

In your code, it would be getting both the span with the class "first_name" and the span with the class "last_name". Personally, if I was going to access the span with the class "first_name", I'd just do the following:

document.getElementsByClassName("first_name")[0];

However, if you want to access it by going through the h1, you could do something like this:

document.getElementsByTagName("h1")[0].getElementsByClassName("first_name")[0];