2nd/10_Wiki/Topics/Domain_Programming/Topic_CSS/CSS_Transitions.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
css-transitions	CSS Transitions	Frontend	draft	conceptual		transition CSS transition smooth transition hover transition transition shorthand		B	0.89	2026-06-23	2026-06-23			css web frontend w3schools transition animation	https://www.w3schools.com/css/css3_transitions.asp

CSS Transitions

🎯 한 줄 통찰 (One-line insight)

CSS transitions allow you to change property values smoothly, over a given duration, typically triggered by a state change such as :hover. [S1]

🧠 핵심 개념 (Core concepts)

• Purpose — CSS transitions allow you to change property values smoothly, over a given duration. [S1]
• Shorthand — the transition property is a shorthand for transition-property, transition-duration, transition-timing-function, and transition-delay. [S1]
• Trigger required — a transition runs when the targeted property changes value (for example, on :hover). [S1]
• Per-property durations — multiple properties can each be given their own duration in a single comma-separated transition declaration. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Property + duration — at minimum specify which property to transition and how long it takes: transition: width 2s;. [S1]
• State-change activation — define the base rule, then change the property in a :hover (or similar) rule to drive the transition. [S1]
• Comma-separated multi-property — list several property duration pairs separated by commas to transition them concurrently with different timings. [S1]

📖 세부 내용 (Details)

The CSS transition Property CSS transitions allows you to change property values smoothly, over a given duration. [S1]

CSS Transition Example The following example shows a 100px * 100px <div> element. The <div> element has specified a transition effect for the width property, with a duration of 2 seconds: [S1]

div {
  width: 100px;
  height: 100px;
  background-color: red;
  transition: width 2s;
}

How to Trigger the Transition Now, we add a div:hover class that specifies a new value for the width property when a user mouses over the <div> element: [S1]

div:hover {
  width: 300px;
}

Change Multiple Property Values The following example adds a transition effect for the width, height, and background-color properties, with a duration of 2 seconds for the width, 4 seconds for the height, and 3 seconds for the background-color: [S1]

div {
  transition: width 2s, height 4s, background-color 3s;
}

CSS Transition Properties The following table lists the CSS transition properties: [S1]

Property	Description
transition	A shorthand property for setting the four transition properties into a single property
transition-delay	Specifies a delay (in seconds) for the transition effect
transition-duration	Specifies how many seconds or milliseconds a transition effect takes to complete
transition-property	Specifies the name of the CSS property the transition effect is for
transition-timing-function	Specifies the speed curve of the transition effect

🛠️ 적용 사례 (Applied in summary)

The page applies a transition to a <div> whose width grows from 100px to 300px over 2 seconds on hover, and a multi-property example transitioning width, height, and background-color with distinct durations. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Single-property transition triggered on hover (language: CSS):

div {
  width: 100px;
  height: 100px;
  background-color: red;
  transition: width 2s;
}

div:hover {
  width: 300px;
}

Multiple properties with different durations:

div {
  transition: width 2s, height 4s, background-color 3s;
}

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source.

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.89
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS Transition Timing, CSS Animations, CSS 3D Transforms
• 참조 맥락: The entry point for smoothly animating property changes between two states; deeper control lives in the transition timing/delay properties.

📚 출처 (Sources)

• [S1] W3Schools — CSS Transitions — https://www.w3schools.com/css/css3_transitions.asp

📝 변경 이력 (Change history)

• 2026-06-23: Initial draft synthesized from the W3Schools "CSS Transitions" page (Astra wiki-curation, P-Reinforce v3.1 format).