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How to access HTML Elements with JavaScript

Using "untidy" HTML code can result in JavaScript errors.

These two JavaScript statements will produce different results:


Example of Accessing HTML Elements with JavaScript

These two JavaScript statements will produce different results:
index.html
Example: HTML
<script>
// Only paragraph 2 will be overwritten
document.getElementById("demo").innerHTML = "HELLO.";
</script>

Full Example of Accessing HTML Elements with JavaScript

These two JavaScript statements will produce different results:
index.html
Example: HTML
<!DOCTYPE html>
<html>
<body>

<p id="Demo">This is paragraph 1.</p>
<p id="demo">This is paragraph 2.</p>

<script>
// Only paragraph 2 will be overwritten
document.getElementById("demo").innerHTML = "HELLO.";
</script>

</body>
</html>

Output should be:

Full Example of Accessing HTML Elements with JavaScript





Category:
Web Tutorial
Sub Category:
HTML Style Guide
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