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Ok so I am wondering which way is the preffered way to access a certain tag.
Is it better to use..
document.getElementById('myDiv').innerHTML
or this way..
document.getElementsByTagName('div')[0].innerHTML
// I use [0] because it is the first div in the body
My guess is that it doesn’t matter at all which way i do it.
Absolutely the
getElementByIdis better in that case. It’s much faster.Update
Here is a test about JavaScript selector functions. http://jsperf.com/queryselectorall-vs-getelementbyid/6
There are not many articles about performance of JavaScript selector functions. Instead there are many articles about jQuery selector performance like this or this. jQuery uses native JavaScript selector functions internally, so you can guess from these articles.