npm install cucumberfor local installation in your project.
npm install -g cucumberfor global installation.
npm install --save-dev cucumberto install Cucumber.js as a development dependency.
Creating test definitions
Position the caret at the step without a definition, press Alt+Enter, and select Create step definition or Create all step definitions.
Alternatively, hover the mouse over the step and use the links in the popup.
In the dialog that opens, specify the name for the new file and the language to write the definitions in.
If such file already exists, JetBrains Rider displays a popup where you have to select a file to add the definition to or choose to create a new file.
With JetBrains Rider, you can jump between a file and the related test file or from a test result in the Test Runner Tab to the test.
Open the file in the editor and selector from the context menu, or just press N/A.
To jump from a step in a .feature file to the step definition, press and hold Ctrl, hover over the step, and click the step when it turns into a link.
To jump from a test result to the test, select the test name in the Test Runner tab and choose Jump to Source from the context menu. The test file opens in the editor with the cursor placed at the test definition.
Configuring syntax highlighting
You can configure Cucumber.js-aware syntax highlighting according to your preferences and habits.
Select the color scheme, accept the highlighting settings inherited from defaults or customize them as described in Configuring Colors and Fonts.