Experimental Features

Experimental features are not part of stable Slint and may change at any time. Their purpose is to let us try new ideas and collect feedback before we commit to them.

Experimental features are opt-in. How you enable them depends on the language and tool you use.

Enabling experimental features

Rust

Set the SLINT_ENABLE_EXPERIMENTAL_FEATURES environment variable when building your application:

SLINT_ENABLE_EXPERIMENTAL_FEATURES=1 cargo build

bash

C++

Pass the -DSLINT_FEATURE_EXPERIMENTAL=ON flag to CMake when configuring Slint:

cmake -DSLINT_FEATURE_EXPERIMENTAL=ON ..

bash

This only works when building Slint from sources. Prebuilt C++ packages do not expose experimental features.

NodeJS

Set the SLINT_ENABLE_EXPERIMENTAL_FEATURES environment variable when running your application, since the Slint compiler runs at load time:

SLINT_ENABLE_EXPERIMENTAL_FEATURES=1 node app.js

bash

Python

Set the SLINT_ENABLE_EXPERIMENTAL_FEATURES environment variable when running your application, since the Slint compiler runs at load time:

SLINT_ENABLE_EXPERIMENTAL_FEATURES=1 python app.py

bash

Tools

The SLINT_ENABLE_EXPERIMENTAL_FEATURES variable also enables experimental features in slint-viewer. slint-lsp always has experimental features enabled.

SlintPad

Add ?EXPERIMENTAL=1 to the SlintPad URL: snapshots.slint.com/master/editor/?EXPERIMENTAL=1 ↗.