Feb 23
17
John Mueller of Google said not all Googlebots use the same rendering engine, in fact, not all Googlebots need to do rendering John added. So while the main desktop and mobile Google search crawlers, the main Googlebots, do rendering and render JavaScript pretty well, not all the Googlebots do or need to.
Read the rest here:
Google: Not All Googlebots Use Same Rendering Engine & Render JavaScript