Document.getElementsByTagName vs getElementsByClassName

Developers should use Document meets developers should use getelementsbyclassname when they need to efficiently select and work with groups of elements that share a common class, such as updating all buttons with a specific style or iterating through form inputs. Here's our take.

Document.getElementsByTagName

Nice Pick

Developers should use Document

Pros

• getElementsByTagName when they need to select all elements of a specific type in a document, such as for batch styling, event handling, or content updates
• Related to: document-object-model, javascript-dom

Cons

• Specific tradeoffs depend on your use case

getElementsByClassName

Developers should use getElementsByClassName when they need to efficiently select and work with groups of elements that share a common class, such as updating all buttons with a specific style or iterating through form inputs

Pros

• It is particularly useful in scenarios where you want to apply changes to multiple elements without individually targeting each one, making it ideal for tasks like toggling visibility, adding event listeners, or modifying attributes in bulk
• Related to: javascript, dom-manipulation

Cons

• Specific tradeoffs depend on your use case

The Verdict

Use Document.getElementsByTagName if: You want getelementsbytagname when they need to select all elements of a specific type in a document, such as for batch styling, event handling, or content updates and can live with specific tradeoffs depend on your use case.

Use getElementsByClassName if: You prioritize it is particularly useful in scenarios where you want to apply changes to multiple elements without individually targeting each one, making it ideal for tasks like toggling visibility, adding event listeners, or modifying attributes in bulk over what Document.getElementsByTagName offers.

The Bottom Line

Document.getElementsByTagName wins

Developers should use Document