javascript - Best DOMContentLoaded fallback -

what best way fallback of domcontentloaded not supported < ie9?

document.addeventlistener('domcontentloaded',function(){/*code here*/}) 

from mdn:

internet explorer 8 supports readystatechange event, can used detect dom ready. in earlier version of internet explorer, state can detected regularily trying execute document.documentelement.doscroll("left"), snippet throw error until dom ready.