Encounter some confusion in the study of regular time, their own research a little, recorded as follows:
In the js, when printing a character string by a backslash and letters, there will be three cases
First, only print the letters, do not print a backslash
Contain letters: acdeghijklmopqswyz
Second, nothing Print
Contain letters: bfnrtv
Third, an error
Contain letters: ux
For the second and third cases, indicating that these are in line with the special, are summarized as follows:
\ B backspace
\ F formfeed
\ N newline
\ R carriage return
\ T horizontal tab
\ V vertical tab
\ U unicode code, usually followed by four hexadecimal numbers, therefore, usually unicode-16, for example, \ u4f60 that you
\ X 16 hex meaning behind with two, then a single-byte code, for example \ xA7 represent §
Will use positive / Replace \ relatively easy, but in turn was replaced will be very troublesome, online information, there are two solutions
1, to the back-end
2, in the body plus a hidden input, the string will be converted to a starting value set