This might be an indication of an iframe taking too long to load

2015-04-07 20:36

wkhtmltopdf 如果出现此问题，可能是 google的js或百度统计的js在变成 iframe时进行阻碍。

http://stackoverflow.com/questions/9249680/how-to-check-if-iframe-is-loaded-or-it-has-a-content