Hey,
ive got a problem and i hope that somebody may got an idea.
My Problem:
I´m working with Highcharts.
If the user (i only got one User) refresh or come back to the Page see the same zoom?
Cause my Highcharts refresh automaticly after 2min (cause the Highchart gets new Data each ~2minutes).
Idea #1: Save the zoom from the Highchart.
Idea #2: Save automaticly the whole Page into a Cookie, into the localStorage or somehow else.
Hope u understand my issue.
Greetings from Germany 
Getze
