border-image-width属性用于设置边框图像的宽度。您可以尝试运行以下代码以实现border-image-width属性-
<html> <head> <style> #borderimg1 { border: 15px solid transparent; padding: 15px; border-image-source: url(https://nhooo.com/css/images/border.png); border-image-repeat: round; border-image-slice: 50; border-image-width: 10px; } </style> </head> <body> <p id = "borderimg1">This is image border example.</p> </body> </html>