Files
code-crispies/lessons/51-js-dom.json
Michael Czechowski ae8f9fef45 feat: add JavaScript learning section with starter lessons and sidebar section headers
Implementation following plan:
- S01: Foundation: schema, section config, and router
- S02: Install CodeMirror JavaScript language support
- S03: Create JavaScript lesson JSON files (variables, DOM, events)
- S04: Register JavaScript lessons in module stores
- S05: Add JavaScript validation logic
- S06: Add JavaScript mode to LessonEngine preview rendering
- S07: Add JavaScript mode to CodeEditor
- S08: Update app.js for JavaScript mode support
- S09: Update navigation HTML and CSS theming for JavaScript section
- S10: Add section grouping headers in sidebar navigation
- S11: Update and write tests
2026-03-28 20:22:50 +01:00

140 lines
5.0 KiB
JSON

{
"$schema": "../schemas/code-crispies-module-schema.json",
"id": "js-dom",
"title": "JS DOM",
"description": "Learn to select and modify HTML elements using JavaScript DOM methods like querySelector and textContent.",
"mode": "javascript",
"difficulty": "beginner",
"lessons": [
{
"id": "js-query",
"title": "querySelector",
"description": "Use <kbd>document.querySelector()</kbd> to find the first element matching a CSS selector. It returns a single element you can then modify.",
"task": "Select the <kbd>h1</kbd> element and store it in a constant called <kbd>title</kbd>",
"previewHTML": "<h1>Hello</h1><p id=\"out\">Waiting...</p>",
"previewBaseCSS": "body { font-family: system-ui, sans-serif; padding: 1rem; }",
"sandboxCSS": "",
"initialCode": "",
"codePrefix": "",
"codeSuffix": "\ndocument.getElementById('out').textContent = title.tagName;",
"solution": "const title = document.querySelector('h1');",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "querySelector",
"message": "Use <kbd>document.querySelector()</kbd> to select an element"
},
{
"type": "regex",
"value": "querySelector\\(['\"`]h1['\"`]\\)",
"message": "Pass <kbd>'h1'</kbd> as the selector"
},
{
"type": "regex",
"value": "const\\s+title\\s*=",
"message": "Store the result in a constant called <kbd>title</kbd>"
}
]
},
{
"id": "js-text",
"title": "textContent",
"description": "The <kbd>textContent</kbd> property lets you read or change the text inside an element. Setting it replaces all existing text.",
"task": "Select the <kbd>.msg</kbd> element and set its <kbd>textContent</kbd> to <kbd>\"Done!\"</kbd>",
"previewHTML": "<p class=\"msg\">Waiting...</p>",
"previewBaseCSS": "body { font-family: system-ui, sans-serif; padding: 1rem; }",
"sandboxCSS": "",
"initialCode": "",
"codePrefix": "",
"codeSuffix": "",
"solution": "document.querySelector('.msg').textContent = \"Done!\";",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "querySelector",
"message": "Use <kbd>querySelector</kbd> to find the element"
},
{
"type": "contains",
"value": "textContent",
"message": "Use the <kbd>textContent</kbd> property to change the text"
},
{
"type": "regex",
"value": "(\"Done!\"|'Done!'|`Done!`)",
"message": "Set the text to <kbd>\"Done!\"</kbd>"
}
]
},
{
"id": "js-style",
"title": "Inline Styles",
"description": "Access the <kbd>style</kbd> property to set inline CSS on an element. CSS properties with dashes become camelCase: <kbd>background-color</kbd> becomes <kbd>backgroundColor</kbd>.",
"task": "Select the <kbd>.box</kbd> element and set its <kbd>style.color</kbd> to <kbd>\"coral\"</kbd>",
"previewHTML": "<p class=\"box\">Style me!</p>",
"previewBaseCSS": "body { font-family: system-ui, sans-serif; padding: 1rem; } .box { font-size: 1.5rem; font-weight: bold; }",
"sandboxCSS": "",
"initialCode": "",
"codePrefix": "",
"codeSuffix": "",
"solution": "document.querySelector('.box').style.color = \"coral\";",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "querySelector",
"message": "Use <kbd>querySelector</kbd> to find the element"
},
{
"type": "contains",
"value": ".style.",
"message": "Use the <kbd>.style</kbd> property to set CSS"
},
{
"type": "regex",
"value": "style\\.color\\s*=",
"message": "Set <kbd>style.color</kbd> on the element"
},
{
"type": "regex",
"value": "(\"coral\"|'coral'|`coral`)",
"message": "Set the color to <kbd>\"coral\"</kbd>"
}
]
},
{
"id": "js-classlist",
"title": "classList",
"description": "The <kbd>classList</kbd> property provides methods to add, remove, or toggle CSS classes on an element without touching other classes.",
"task": "Select the <kbd>.card</kbd> element and add the class <kbd>\"active\"</kbd> using <kbd>classList.add()</kbd>",
"previewHTML": "<div class=\"card\">Toggle me</div>",
"previewBaseCSS": "body { font-family: system-ui, sans-serif; padding: 1rem; } .card { padding: 1rem; border: 2px solid gray; border-radius: 8px; } .active { border-color: coral; background: #fff0ee; }",
"sandboxCSS": "",
"initialCode": "",
"codePrefix": "",
"codeSuffix": "",
"solution": "document.querySelector('.card').classList.add(\"active\");",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "classList",
"message": "Use the <kbd>classList</kbd> property"
},
{
"type": "regex",
"value": "classList\\.add\\(",
"message": "Call <kbd>classList.add()</kbd> to add a class"
},
{
"type": "regex",
"value": "(\"active\"|'active'|`active`)",
"message": "Add the class <kbd>\"active\"</kbd>"
}
]
}
]
}