How to handle JS saving, reading, line feed, and Json conversion errors _ javascript skills

The following error message is returned when JS saves and reads the line feed to Json: UnexpectedtokenILLEGAL. The specific solution is as follows. For more information, see Unexpected token ILLEGAL.

Solution:
1. Save:

The Code is as follows:

Varcont = encodeURI ($ ("# txtMessage_Content"). val (). replace (/% 0A/g, "brHH ");

2. Read:

The Code is as follows:

Entity [I]. Contents. replace (//, ">"). replace (/brHH/g ,"
")

Note:
The main idea is the replacement method.
Js directly captures the text. It seems that the carriage return cannot be caught, and encodeURI can catch % 0A.

The Code is as follows:

Replace (//, "> ")

This sentence is for processing JS injection.

The Code is as follows:

Replace (/brHH/g ,"
")

Here we will replace the one that replaces the carriage return and display it again.