Exporting for the Web¶
Exporting for the web generates several files to be served from a web server, including a default HTML page for presentation. A custom HTML file can be used, see Compiling for the Web.
The default HTML file is designed to fit the game perfectly without cutting off
parts of the canvas when the browser window is scaled to the game’s dimensions.
This way it can be inserted into an
<iframe> with the game’s size, as is
common on most web game hosting sites.
Serving the files¶
.html file can be used as
DirectoryIndex and can be
renamed to e.g.
index.html at any time, its name is never depended on.
It can also be inserted into another HTML file as an
Users must allow third-party cookies when playing a game presented in an
The other exported files are served as they are next to the
.pck files are binary, usually delivered with the
.wasm file is the WebAssembly
module, delivered as
Delivering the files with gzip compression is recommended especially for the
.wasm files, which are usually large in
If a runnable web export template is available, a button appears between the Stop scene and Play edited Scene buttons in the editor to quickly open the game in the default browser for testing.
For asm.js Memory Size is fixed and must thus be set during export. Try using no more than necessary to strain users’ browsers as little as possible. For WebAssembly, memory growth is enabled, so this option is not needed nor displayed.
Head Include is appended into the
<head> element of the generated
HTML page. This allows, for example, linking web fonts for use in the page.
Web export limitations¶
Exported files must not be reused¶
The exported files ending with
fs.js are adjusted on export
specifically for that game’s version and the given export options. They must
not be reused in futher exports.
Some functions must be called from input callbacks¶
Browsers do not allow arbitrarily entering full screen at any time. The same
goes for capturing the cursor. Instead, these actions have to occur as a
entering full screen from within an input callback such
Starting exported games from the local file system¶
Many browsers will not load exported projects when opened locally
file:// protocol. To get around this, use a local server.
Python offers an easy method for this, using
python -m SimpleHTTPServer
with Python 2 or
python -m http.server with Python 3 will serve the current
working directory on
Godot tries to detect the user’s locale using information provided by the
browser, but this is rather unreliable. A better way is to use CGI to read the
Module.locale after the
Module objects is created, but before
the engine starts, Godot will use that value to initialize the locale.
In any case, users should always be offered the option to configure the locale
In web builds, the
This allows interacting with the browser in ways not possible with script
languages integrated into Godot.
value and returned by
eval() under certain circumstances:
booleanis returned as GDScript bool
stringis returned as GDScript String
objectis only converted and returned if it has certain
Number-type properties, listed in order of priority:
- Objects with
zproperties are returned as a Vector3
- Objects with
heightproperties are returned as a Rect2
- Objects with
yproperties are returned as a Vector2
- Objects with an
band an optional
eval method also accepts a second, optional Boolean argument, which
specifies whether to execute the code in the global execution context,
false to prevent polluting the global namespace: