What is faster - querySelector or getElementById?

Answer 1

getElementById probably because it doesnt do any additional operations such as analysing your input.

Answer 2

Try this to test the speed of each update functions, notice the speed of jQuery function.

https://code.sololearn.com/Wu20kv75u57T/?ref=app

Answer 3

get ElementById- gets an element with particular I'd ,in this case it will be operable to all same ID's .
querySelector- it is operable for the first occurance of a id

Answer 4

I think, querySelector is faster

Answer 5

getElementById is faster but no significant. So we use whichever that convenient to us most.