Made a subline of div width is 500 box and then capture this box picture, just download the Fw slice tool was used to measure the width of the box in the picture (read is the number of the lower left (pixels) should be the default) and found that read pixel value and pixel values are not set in my own code, this is why ah, have know little brother, little sister... Hurry, baidu no answers,

CodePudding user response:

F12, see the browser's elements what is CSS styles, have more than 2 pixels border and general frame of a pixel,