Document.getElementsByClassName vs getElementsByTagName
Developers should use getElementsByClassName when they need to select multiple elements that share a common class, such as styling all buttons with a specific class or updating content in a group of similar elements meets developers should use getelementsbytagname when they need to efficiently select all elements of a specific type in a document or within a parent element, such as for styling all paragraphs, adding event listeners to all links, or iterating through table rows. Here's our take.
Document.getElementsByClassName
Developers should use getElementsByClassName when they need to select multiple elements that share a common class, such as styling all buttons with a specific class or updating content in a group of similar elements
Document.getElementsByClassName
Nice PickDevelopers should use getElementsByClassName when they need to select multiple elements that share a common class, such as styling all buttons with a specific class or updating content in a group of similar elements
Pros
- +It is particularly useful for dynamic web applications where elements are added or removed, as the returned collection updates automatically
- +Related to: javascript, dom-manipulation
Cons
- -Specific tradeoffs depend on your use case
getElementsByTagName
Developers should use getElementsByTagName when they need to efficiently select all elements of a specific type in a document or within a parent element, such as for styling all paragraphs, adding event listeners to all links, or iterating through table rows
Pros
- +It is particularly useful in scenarios where dynamic content requires manipulation without unique IDs or classes, but note that it returns a live collection that updates automatically as the DOM changes, which can impact performance in large applications
- +Related to: javascript, dom-manipulation
Cons
- -Specific tradeoffs depend on your use case
The Verdict
Use Document.getElementsByClassName if: You want it is particularly useful for dynamic web applications where elements are added or removed, as the returned collection updates automatically and can live with specific tradeoffs depend on your use case.
Use getElementsByTagName if: You prioritize it is particularly useful in scenarios where dynamic content requires manipulation without unique ids or classes, but note that it returns a live collection that updates automatically as the dom changes, which can impact performance in large applications over what Document.getElementsByClassName offers.
Developers should use getElementsByClassName when they need to select multiple elements that share a common class, such as styling all buttons with a specific class or updating content in a group of similar elements
Disagree with our pick? nice@nicepick.dev