querySelector vs getElementById

Get Element By Id

• It returns a node list which is live, meaning if you add or remove any element from the DOM the node list will update
• It is faster relative to the query selector methods

Query Selector

• It returns a node list which was available at the time of the execution

Also Read:

1. Default function parameters
2. position: relative
3. Difference between async and defer attributes in script tags
4. Understanding callbacks in javascript
5. Split a string in javascript when both comma and spaces are present