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Example
<!DOCTYPE html>
<html>
<body>
<h1>The Document Object</h1>
<h2>The querySelectorAll() Method</h2><p>Add a background color all elements with class=”example”:</p>
<h2 class=”example”>A heading</h2><div class=”asdf”><p class=”example”>A paragraph.</p> </div>
<script>
const tinaicon = document.querySelectorAll(“.asdf .example”);
for (let i = 0; i < tinaicon.length; i++) {
tinaicon[i].innerHTML = “your text here”;
}
</script></body>
</html>
output
Browser Support
document.getElementsByClassName() is a DOM Level 1 (1998) feature.
It is fully supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | 9-11 |
Parameters
| Parameter | Description |
| classname | Required. The class name of the elements. Search for multiple class names separated by spaces like “test demo”. |
# Summary
Here is what you've learned in this lesson:
- Browser Support
- Parameters
Next up:
How to Check if a String Contains a Specific Word in Python and Java
Continue to the next lesson and learn more about How to Check if a String Contains a Specific Word in Python and Java.