What if you write & in the field, then ajax splits the request?

Question

AJAX

Hello! There is the simplest ajax code.
data is specified like this: I take data from input and send it to the server. If an & occurs in input, then the word after this character is sent as the name of the query. For example, if you write in the field like this: text&abc=sss, then abc becomes the name, and sss becomes the value. How can I fix this so that the data is sent as it is written in the input?
data: "name1=val1&name2=val2",