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. Getting started with automation testing for webrtc applications
2. Getting started with es6 iterators and iterables
3. Progressive enhancement vs Graceful degradation
4. Applying floats and clearfix to block elements
5. The JavaScript Prototype Property - Visualized