# Reaction

Represents a reaction to a comment in YouTrack added by a user.

## Attributes

This table describes attributes of the `Reaction` entity.

* To receive an attribute in the response from the server, specify it explicitly in the `fields` request parameter.

* To update an attribute, provide it in the body of a POST request.

|  Field  |  Type  |  Description  |
| --- | --- | --- |
|  id  |  String  |  The ID of the reaction. `Read-only`.  |
|  author  |  [User](api-entity-User.html)  |  The user who put the reaction. `Can be null`.  |
|  reaction  |  String  |     The reaction identifier used in API requests and responses.       Currently supported reaction names include `yes`, `thanks`, `thumbs-up`, `thumbs-down`, `strong`, `clapping`, `ok`, `congratulations`, `glad`, `worry`, `grimacing`, `grinning`, `joy`, `tongue-out`, `saint`, `cool`, `surprised`, `sleepy`, `relieved`, `scared`, `sick`, `tired`, `tears`, `wink`, `nerd`, `crossed-fingers`, `waiting`, `thank-you`, `fist`, `raised-hand`, `wave`, `rock`, `mind-blown`, `cat-in-love`, `scared-cat`, `rocket`, `teddybear`, `red-heart`, `no`, `question`, `100`, `eyes`, `plus-one`, `minus-one`, `comment`, `okay`, and `zero` through `nine`.    `Can be null`.  |