UTF-8 和UTF-8 without DOM 有什么区别？

UTF-8 and UTF-8 without BOM (Byte Order Mark) are two different encoding schemes for representing Unicode characters.

UTF-8 is a variable-length encoding scheme for Unicode characters that uses between one and four bytes to represent each character. It is a widely used encoding scheme that is supported by most modern software and operating systems.

UTF-8 without BOM is the same as UTF-8, but without the Byte Order Mark at the beginning of the file. The Byte Order Mark is a special character that is sometimes added to the beginning of a file to indicate the byte order of the data. However, it is not necessary for UTF-8 encoded files, and some software may not handle it correctly.

In practice, the main difference between UTF-8 and UTF-8 without BOM is that UTF-8 without BOM may not be recognized correctly by some software that expects to see the Byte Order Mark at the beginning of the file.