Python Lesson: Fix the Syntax Error

Code Runner Challenge

Fix the syntax error. Run the code to get a hint!

Lines: 1 Characters: 0
Output
Click "Run" in code control panel to see output ...

Python Lesson: Complete the Function

Code Runner Challenge

Complete the function to calculate the area of a rectangle. Replace the ??? with the correct calculation.

Lines: 1 Characters: 0
Output
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Java Lesson: Fix the Compilation Error

Code Runner Challenge

The code has a compilation error. Fix it!

Lines: 1 Characters: 0
Output
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JavaScript Lesson: Complete the Loop

Code Runner Challenge

Complete the for loop to print numbers 1 through 5. Fill in the missing parts of the loop.

Lines: 1 Characters: 0
Output
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Code Runner Reference

Code runner requires defining and passing liquid variables for challenge and code to the include file code-runner.html. Study the source of this markdown file to see how the liquid variables are defined for each example above.

Parameters

  • runner_id (required): Unique ID for each runner on the page (e.g., “exercise1”, “exercise2”)
  • language (optional): “python”, “java”, or “javascript” (defaults to “python”)
  • challenge: Variable containing the challenge/instruction text
  • code: Variable containing the starter code
  • height (optional): Editor height (defaults to “300px”)

Code Runner Architecture

HTML Component

  • File: _includes/code-runner.html
  • Reusable component with parameters for customization
  • Uses CodeMirror for syntax highlighting

SCSS Styling

  • Main file: _sass/open-coding/forms/code-runner.scss
  • Uses mixins for consistent styling across lessons:
    • @mixin control-panel - Top/bottom toolbars with buttons
    • @mixin sub-container - Groups editor/output sections
    • @mixin info-panel - Challenge box styling
    • @mixin output-panel - Code output display
    • @mixin icon-button - Consistent button styling
    • @mixin select-control - Dropdown menus

Color Variables

  • File: _sass/open-coding/user-preferences.scss

  • Uses colors that correspond to user preferences

  • --pref-bg-color - Background color
  • --pref-text-color - Text color
  • --pref-accent-color - Accent/emphasis color
  • --ui-border - Border color
  • --panel - Panel background