2nd/10_Wiki/Topic_CSS/CSS_Grid_Items.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-grid-items	CSS Grid Items	Frontend	draft	conceptual		grid-column grid-row grid-column-start grid-column-end grid item span CSS grid lines grid-area		B	0.9	2026-06-23	2026-06-23			css web frontend w3schools grid layout	https://www.w3schools.com/css/css_grid_item.asp

CSS Grid Items

🎯 한 줄 통찰 (One-line insight)

All direct children of a grid container automatically become grid items, and each item can span multiple columns or rows by referencing column-lines and row-lines through grid-column-start/end and grid-row-start/end (or their shorthands). [S1]

🧠 핵심 개념 (Core concepts)

• Grid items — a grid container contains one or more grid items; all direct child elements of a grid container automatically become grid items. [S1]
• Spanning — a grid item can span over multiple columns or rows by specifying where it starts and ends. [S1]
• Grid lines — the lines between the columns are called column-lines, and the lines between the rows are called row-lines; line numbers are used to place a grid item in the container. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Line-number placement — set grid-column-start/grid-column-end (and the row equivalents) to numeric line indices to place and size an item. [S1]
• / span N shorthand — grid-column: 1 / span 2; starts at a line and spans a number of tracks instead of naming the end line. [S1]
• Combined placement — apply both grid-column and grid-row to a single item to span across both axes simultaneously. [S1]

📖 세부 내용 (Details)

Grid items A grid container contains one or more grid items. All direct child elements of a grid container automatically become grid items. A grid item can span over multiple columns or rows; we specify where to start and end a grid item by using placement properties. The lines between the columns in a grid are called column-lines, and the lines between the rows in a grid are called row-lines. We can refer to line numbers when placing a grid item in a grid container. [S1]

Properties for placing grid items [S1]

Property	Purpose
grid-column-start	Specifies on which column-line the grid item will start
grid-column-end	Specifies on which column-line the grid item will end
grid-column	Shorthand property for grid-column-start and grid-column-end
grid-row-start	Specifies on which row-line the grid item will start
grid-row-end	Specifies on which row-line the grid item will end
grid-row	Shorthand property for grid-row-start and grid-row-end

Using grid-column-start and grid-column-end to make an item start at column-line 1 and end at column-line 3: [S1]

.item1 {
  grid-column-start: 1;
  grid-column-end: 3;
}

The same result with the grid-column shorthand using / span: [S1]

.item1 {
  grid-column: 1 / span 2;
}

Using grid-row-start and grid-row-end to make an item start at row-line 1 and end at row-line 3: [S1]

.item1 {
  grid-row-start: 1;
  grid-row-end: 3;
}

The same result with the grid-row shorthand using / span: [S1]

.item1 {
  grid-row: 1 / span 2;
}

Combining grid-column and grid-row so the item spans two columns and two rows: [S1]

.item1 {
  grid-column: 1 / span 2;
  grid-row: 1 / span 2;
}

Complete CSS Grid Item properties reference [S1]

Property	Description
align-self	Aligns the content for a specific grid item along the column axis
grid-area	Shorthand property for grid-row-start, grid-column-start, grid-row-end and grid-column-end
grid-column	Shorthand property for grid-column-start and grid-column-end
grid-column-end	Specifies where to end the grid item
grid-column-start	Specifies where to start the grid item
grid-row	Shorthand property for grid-row-start and grid-row-end
grid-row-end	Specifies where to end the grid item
grid-row-start	Specifies where to start the grid item
justify-self	Aligns the content for a specific grid item along the row axis
place-self	Shorthand property for align-self and justify-self

🛠️ 적용 사례 (Applied in summary)

The page's own examples are the applied cases: placing .item1 by explicit start/end lines, by / span shorthand, and spanning both columns and rows at once. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Explicit line placement (language: CSS):

.item1 {
  grid-column-start: 1;
  grid-column-end: 3;
}

Span shorthand:

.item1 {
  grid-column: 1 / span 2;
}

Span across both axes:

.item1 {
  grid-column: 1 / span 2;
  grid-row: 1 / span 2;
}

⚖️ 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: 0.9
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: CSS Tutorial
• 관련 개념: CSS Grid Align, CSS Grid Item Named, CSS Grid Item Align, CSS Grid Item Order
• 참조 맥락: How individual children are positioned and sized within a grid layout.

📚 출처 (Sources)

• [S1] W3Schools — CSS Grid Items — https://www.w3schools.com/css/css_grid_item.asp

📝 변경 이력 (Change history)

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