{
"$schema": "../schemas/code-crispies-module-schema.json",
"id": "transitions-animations",
"title": "Animations",
"description": "Bring interactivity to your UI by smoothly transitioning properties and creating keyframe-driven animations.",
"difficulty": "beginner",
"lessons": [
{
"id": "transitions-1",
"title": "Transitions",
"description": "Learn how to apply transition to properties for smooth changes on state changes.",
"task": "Add transition: background-color 0.3s to .btn so the color fades smoothly on hover.",
"previewHTML": "",
"previewBaseCSS": "body { font-family: sans-serif; padding: 1rem; } .btn { background: black; color: white; padding: 0.5rem 1rem; border: none; cursor: pointer; } .btn:hover { background: white; color: black; }",
"sandboxCSS": "",
"codePrefix": "/* Add transition */\n.btn {",
"initialCode": "",
"codeSuffix": "}",
"solution": " transition: background-color 0.3s;",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "transition",
"message": "Use the transition property",
"options": { "caseSensitive": false }
},
{
"type": "regex",
"value": "transition:\\s*background-color\\s*0\\.3s",
"message": "Set transition: background-color 0.3s",
"options": { "caseSensitive": false }
}
]
},
{
"id": "transitions-2",
"title": "Timing Funcs",
"description": "Explore easing functions like ease, linear, ease-in, ease-out to control animation pacing.",
"task": "Set transition-timing-function to ease-in-out on .btn.",
"previewHTML": "",
"previewBaseCSS": "body { font-family: sans-serif; padding: 1rem; } .btn { background: navy; color: gold; padding: 0.5rem 1rem; border: none; cursor: pointer; transition: all 0.5s; } .btn:hover { background: gold; color: navy; transform: scale(1.1); }",
"sandboxCSS": "",
"codePrefix": "/* Set timing function */\n.btn {",
"initialCode": "",
"codeSuffix": "}",
"solution": " transition-timing-function: ease-in-out;",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "transition-timing-function",
"message": "Use transition-timing-function",
"options": { "caseSensitive": false }
},
{
"type": "property_value",
"value": { "property": "transition-timing-function", "expected": "ease-in-out" },
"message": "Set timing to ease-in-out"
}
]
},
{
"id": "transitions-3",
"title": "Keyframes",
"description": "Create named animations using @keyframes and apply them via the animation shorthand.",
"task": "Define a keyframe at 50% with transform: translateY(-20px) and apply animation: bounce 1s infinite to .ball.",
"previewHTML": "",
"previewBaseCSS": "body { font-family: sans-serif; padding: 1rem; } .ball { width: 50px; height: 50px; background: crimson; border-radius: 50%; margin: 2rem auto; }",
"sandboxCSS": "",
"codePrefix": "/* Define keyframes and apply animation */\n@keyframes bounce {",
"initialCode": "",
"codeSuffix": "}\n.ball { }",
"solution": " 50% { transform: translateY(-20px); }\n}\n.ball {\n animation: bounce 1s infinite;",
"previewContainer": "preview-area",
"validations": [
{
"type": "contains",
"value": "@keyframes bounce",
"message": "Define @keyframes bounce",
"options": { "caseSensitive": false }
},
{
"type": "regex",
"value": "50%.*transform: translateY\\(-20px\\)",
"message": "At 50%, use transform: translateY(-20px)",
"options": { "caseSensitive": false }
},
{
"type": "contains",
"value": "animation",
"message": "Use animation property on .ball",
"options": { "caseSensitive": false }
},
{
"type": "regex",
"value": "animation:.*bounce.*1s.*infinite",
"message": "Apply animation: bounce 1s infinite",
"options": { "caseSensitive": false }
}
]
},
{
"id": "transitions-4",
"title": "Anim Properties",
"description": "Fine-tune animations with animation-delay, animation-iteration-count, animation-direction, and animation-fill-mode.",
"task": "Apply the pulse animation to .box with animation-name: pulse, animation-duration: 2s, animation-delay: 1s, animation-iteration-count: 2, and animation-fill-mode: forwards.",
"previewHTML": "Pulse
",
"previewBaseCSS": "body { font-family: sans-serif; padding: 1rem; } .box { width: 100px; height: 100px; background: black; color: white; display: flex; align-items: center; justify-content: center; margin: 2rem auto; } @keyframes pulse { 0% { background: black; color: white; transform: scale(1); } 50% { background: white; color: black; transform: scale(1.2); } 100% { background: limegreen; color: black; transform: scale(1); } }",
"sandboxCSS": "",
"codePrefix": "/* Apply animation properties */\n.box {",
"initialCode": "",
"codeSuffix": "}",
"solution": " animation-name: pulse;\n animation-duration: 2s;\n animation-delay: 1s;\n animation-iteration-count: 2;\n animation-fill-mode: forwards;",
"previewContainer": "preview-area",
"validations": [
{
"type": "property_value",
"value": { "property": "animation-name", "expected": "pulse" },
"message": "Set animation-name: pulse"
},
{
"type": "property_value",
"value": { "property": "animation-duration", "expected": "2s" },
"message": "Set animation-duration: 2s"
},
{
"type": "property_value",
"value": { "property": "animation-delay", "expected": "1s" },
"message": "Set animation-delay: 1s"
},
{
"type": "property_value",
"value": { "property": "animation-iteration-count", "expected": "2" },
"message": "Set animation-iteration-count: 2"
},
{
"type": "property_value",
"value": { "property": "animation-fill-mode", "expected": "forwards" },
"message": "Set animation-fill-mode: forwards"
}
]
}
]
}