Dấu chấm lửng
U+2026 HORIZONTAL ELLIPSIS (…). Một ký tự duy nhất thay thế ba dấu chấm, đúng về mặt kiểu chữ và được tính là 1 ký tự thay vì 3.
What is an Ellipsis?
The ellipsis is a punctuation mark consisting of three evenly-spaced dots that indicates an omission, a trailing off, a pause, or suspended thought. Unicode encodes a dedicated ellipsis character (U+2026, …) as a single code point, distinct from simply typing three consecutive periods (...). The difference matters more than most people realize.
The Single Character vs. Three Periods
The ellipsis character U+2026 (…) and three periods (...) look nearly identical on screen but behave very differently:
| Property | Ellipsis U+2026 | Three Periods ... |
|---|---|---|
| Code points | 1 | 3 |
| Line breaking | Stays together | Can break after any period |
| Spacing | Designed by font (often tighter) | Standard period spacing |
| Word count | 1 token | 3 tokens |
| Search matching | May not match ... |
Won't match … |
| Screen reader | "ellipsis" | "period period period" |
From a typographic standpoint, the dedicated ellipsis character is preferable in body text because its spacing is optimized by the font designer. In programming and markup contexts, three periods are often more predictable.
Semantic Uses of the Ellipsis
- Omission in quotations: "Four score and seven years ago…our fathers brought forth…a new nation"
- Trailing speech or thought: She knew the answer, but still…
- Pause or hesitation: "I'm not sure if I should… yes, I'll do it."
- Unfinished lists: The package includes apples, oranges, bananas…
- Code/UI: Loading…, File menu truncation "Open Recen…"
Ellipsis in User Interfaces
In UI design, the ellipsis has a specific convention: a menu item followed by an ellipsis (e.g., "Save As…") indicates that clicking it will open a dialog requiring further input before the action is taken. A menu item without an ellipsis (e.g., "Save") acts immediately. This convention comes from Apple's original Macintosh Human Interface Guidelines.
In modern apps, a three-dot "more options" button (⋯ U+22EF or ··· three bullets) is sometimes called an "ellipsis menu" colloquially, though it is technically a different symbol.
Ellipsis Variants
| Character | Unicode | Name | Use |
|---|---|---|---|
| … | U+2026 | Horizontal Ellipsis | Standard |
| ⋯ | U+22EF | Midline Horizontal Ellipsis | Mathematics |
| ⋮ | U+22EE | Vertical Ellipsis | Mathematics |
| ⋱ | U+22F1 | Down Right Diagonal Ellipsis | Matrix notation |
| ︙ | U+FE19 | Presentation Form Vertical Ellipsis | CJK presentation |
Typing the Ellipsis
- macOS: Option + ; (semicolon)
- Windows: Alt + 0133 (numpad), or the Character Map
- HTML:
…or… - CSS content:
content: "\2026" - Python:
"\u2026"or the literal…
Quick Facts
| Property | Value |
|---|---|
| Unicode code point | U+2026 |
| Unicode name | HORIZONTAL ELLIPSIS |
| Character block | General Punctuation |
| macOS shortcut | Option + ; |
| HTML entity | … |
| UI convention | Ellipsis in menu item = dialog will follow |
| Three periods alternative | ... (U+002E × 3) — fine for code, less ideal for body text |
Thêm trong Typography
Hai ký tự trở lên được kết hợp thành một glyph duy …
Dạng chữ hoa ở chiều cao của chữ thường. CSS: font-variant: small-caps. …
CSS @font-face descriptor specifying which Unicode code points a font should cover. …
Cặp dấu chấm câu bao quanh lời nói trực tiếp hoặc trích …
Dấu được thêm vào chữ cái để thay đổi cách phát âm …
Em: chiều rộng bằng kích thước phông chữ. En: bằng một nửa …
The mechanism by which a rendering engine substitutes glyphs from a secondary …
Dấu chấm câu dùng để phân tách các phần của câu hoặc …
Điều chỉnh khoảng cách giữa các cặp ký tự cụ thể để …
U+00A0. Dấu cách ngăn không cho xuống dòng tại vị trí đó. …