bootshrap will change the IE browser scroll bar style_html/css_WEB-ITnose

During the development of a small website
Customers have been complaining that the scroll bars on the right side of the web page are different in IE11
Later I found that in IE11, 2 page scroll bars will be automatically hidden. , I thought it was the browser's default behavior at first, but it didn't work after changing overflow:scroll. After careful observation, I found that these two pages referenced the bootshrap.css file because they used bootsshrap's special effects, so it was determined that the problem was in bootshrap.css.

After troubleshooting, it was found that the following code was causing the problem.

@-ms-viewport {
width: device-width;
}

Mark it here and provide help to friends who have problems.