javascript - Rendering differences between phantomjs and my web browser -

i trying take screenshot webpage phantomjs. use following code (which works) :

    var args = phantom.args;     var address = args[0];     var destination = args[1];     var page = require('webpage').create();     page.viewportsize = { width: 1349, height: 653 };     page.open(address, function () {         page.render(destination);         phantom.exit();     }); 

unfortunately, image phantomjs has differences see in browser (chrome , firefox). text sometime larger, button not have same behavior, ...

does explain why or how exact screenshot of see in browser ? !

look @ rasterize.js example , wiki page here.

sometimes need delay rendering few seconds.