problem description before,after and other pseudo-elements and pseudo-classes have no effect the environmental background of the problems and what methods you have tried Project framework: iview + vue + stylus sets up the background system, and ca...
Writing method one: .businessType: before { content: ; display: block; } method two: .businessType: before { content: ; display: table; } Why are the two writing methods different? the first writing method can not occupy a space, while the secon...
div displays the file name, and x is the I tag. Now when the mouse is over I, I need to modify the background color of div, but there is no way to select the previous element, , or can I select the first child element div in the parent div ...
on ios10 devices, the full-screen button for video tag video is incomplete. ...
want to zlib compress a string of hexadecimal strings, such as "00FF00 ", and return the same hexadecimal string: test = b 00FF00 print(zlib.compress(test)) the result returns breadx x9c30ps30 x00 x00 x04 x90 x01M , which contains c...
or whether there are other similar controls. ...
recently, I am working on a book information management system. There is a table marc that stores the information of books. There are more than 20 fields in it. when importing data, it is required to check the duplicates according to 7 fields, and the...
import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public class Reminder { public static void main(String args[]) { ArrayList<String> arrStr = new ArrayList<>(); Map<...