# SDL_HINT_EMSCRIPTEN_ASYNCIFY

Disable giving back control to the browser automatically when running with asyncify.

## Header File

Defined in [<SDL3/SDL_hints.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_hints.h)

## Syntax

```c
#define SDL_HINT_EMSCRIPTEN_ASYNCIFY "SDL_EMSCRIPTEN_ASYNCIFY"
```

## Remarks

With -s ASYNCIFY, SDL calls emscripten_sleep during operations such as
refreshing the screen or polling events.

This hint only applies to the emscripten platform.

The variable can be set to the following values:

- "0": Disable emscripten_sleep calls (if you give back browser control
  manually or use asyncify for other purposes).
- "1": Enable emscripten_sleep calls. (default)

This hint can be set anytime.

## Version

This hint is available since SDL 3.2.0.

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[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryHints](CategoryHints)

