2nd/10_Wiki/Topic_CSS/CSS_Transitions_Timing.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-transition-timing	CSS Transition Timing	Frontend	draft	conceptual		transition-timing-function transition-delay speed curve ease cubic-bezier transition shorthand		B	0.89	2026-06-23	2026-06-23			css web frontend w3schools transition timing-function animation	https://www.w3schools.com/css/css3_transitions_timing.asp

CSS Transition Timing

🎯 한 줄 통찰 (One-line insight)

The transition-timing-function property sets the speed curve of a transition, transition-delay postpones its start, and the transition shorthand combines property, duration, timing-function, and delay into one declaration. [S1]

🧠 핵심 개념 (Core concepts)

• transition-timing-function — specifies the speed curve of the transition effect. [S1]
• transition-delay — introduces a waiting period (in seconds or milliseconds) before the transition begins. [S1]
• Transition + transform — the transform property can be transitioned alongside other properties for combined effects. [S1]
• Two ways to declare — set the four individual transition-* properties separately, or collapse them into the transition shorthand. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Speed-curve selection — choose among ease, linear, ease-in, ease-out, ease-in-out, or a custom cubic-bezier(n,n,n,n). [S1]
• Delayed start — transition-delay: 1s; waits before the visible change begins. [S1]
• Shorthand ordering — transition: width 2s linear 1s; corresponds to property, duration, timing-function, delay. [S1]

📖 세부 내용 (Details)

The Speed Curve of the Transition The transition-timing-function property specifies the speed curve of the transition effect. The transition-timing-function property can have the following values: [S1]

• ease — specifies a transition effect with a slow start, then fast, then end slowly (this is default). [S1]
• linear — specifies a transition effect with the same speed from start to end. [S1]
• ease-in — specifies a transition effect with a slow start. [S1]
• ease-out — specifies a transition effect with a slow end. [S1]
• ease-in-out — specifies a transition effect with a slow start and end. [S1]
• cubic-bezier(n,n,n,n) — lets you define your own values in a cubic-bezier function. [S1]

The following example shows the different speed curves applied to several elements: [S1]

#div1 {transition-timing-function: linear;}
#div2 {transition-timing-function: ease;}
#div3 {transition-timing-function: ease-in;}
#div4 {transition-timing-function: ease-out;}
#div5 {transition-timing-function: ease-in-out;}

Delay the Transition Effect The transition-delay property specifies a delay (in seconds) for the transition effect. The following example has a 1 second delay before starting: [S1]

div {
  transition-delay: 1s;
}

Transition + Transformation The following example adds a transition effect to the transformation: [S1]

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

A further example transitions both background-color and transform on a button: [S1]

button {
  transition: background-color 1s ease-out, transform 1s ease-out;
}

More Transition Examples The CSS transition properties can be specified one by one, like this: [S1]

div {
  transition-property: width;
  transition-duration: 2s;
  transition-timing-function: linear;
  transition-delay: 1s;
}

Or by using the shorthand property transition: [S1]

div {
  transition: width 2s linear 1s;
}

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 different timing functions to #div1–#div5, a 1-second delay to a <div>, and combined transitions of size/color/transform on a <div> and a button. It also shows the individual-property and shorthand forms of the same transition. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Individual properties vs. shorthand (language: CSS):

div {
  transition-property: width;
  transition-duration: 2s;
  transition-timing-function: linear;
  transition-delay: 1s;
}

div {
  transition: width 2s linear 1s;
}

Transition combined with transform:

button {
  transition: background-color 1s ease-out, transform 1s ease-out;
}

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

The transition-timing-function values trade off acceleration character: linear keeps a constant speed; ease (the default) starts slow, speeds up, then ends slow; ease-in starts slow; ease-out ends slow; ease-in-out is slow at both ends; and cubic-bezier(n,n,n,n) lets you define a custom curve when none of the presets fit. Choose linear for mechanical/continuous motion and an ease* variant for more natural-feeling UI transitions. [S1]

⚖️ 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 Transitions, CSS Animations, CSS Animation Timing
• 참조 맥락: Provides the fine-grained timing and delay control that builds on the basic transition declaration.

📚 출처 (Sources)

• [S1] W3Schools — CSS Transition Timing — https://www.w3schools.com/css/css3_transitions_timing.asp

📝 변경 이력 (Change history)

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