Cluster de grafemas

Technical/Unicode

Caractere percebido pelo usuário que pode ser composto por múltiplos pontos de código Unicode, mas exibido como uma única unidade visual.

A grapheme cluster is what a user sees as "one character" on screen, even though it may be encoded as several code points. This concept is crucial for emoji because many emoji are composed of multiple code points.

For example, a flag emoji like 🇰🇷 is two Regional Indicator code points. A person emoji with skin tone like 👍🏽 is two code points (the gesture + a modifier). ZWJ sequences can combine even more.

Programming languages differ in how they handle grapheme clusters. JavaScript's `.length` counts UTF-16 code units, so `'👨‍👩‍👧'.length` returns 8, not 1. Proper grapheme-aware APIs (like `Intl.Segmenter`) return the expected count of 1.

Termos relacionados

Conector de largura zero (ZWJ) Conector de largura zero (ZWJ)
Caractere Unicode invisível (U+200D) usado para unir vários emoji em um único emoji composto, como a combinação de pessoas e objetos em emoji de profissões. ICU (ICU) ICU (ICU)
International Components for Unicode — uma biblioteca de código aberto amplamente utilizada que fornece suporte a Unicode e internacionalização, incluindo processamento de emoji. Ponto de código Ponto de código
Valor numérico único atribuído a cada caractere no padrão Unicode, escrito no formato U+XXXX (por exemplo, U+1F600 para 😀).

Ferramentas relacionadas

🔍 Analisador de sequências Analisador de sequências
Decodifique sequências ZWJ, modificadores de tom de pele, sequências de teclas e pares de bandeiras em componentes individuais. 🔢 Consulta Unicode Consulta Unicode
Digite um codepoint como U+1F600 e obtenha o emoji, detalhes de codificação, bytes UTF-8/16 e entidades HTML.

Artigos relacionados

Unicode Lookup: Find Any Emoji by Code Point
Enter a Unicode code point like U+1F600 or paste an emoji to see its full encoding breakdown — UTF-8, UTF-16, HTML entities, and more.
Why string.length Lies: Grapheme Clusters and Emoji Length
Why string.length fails for emoji, what grapheme clusters are, and how to correctly count characters in JavaScript, Python, and more.
Emoji String Length Gotchas: Surrogate Pairs, Grapheme Clusters, and Byte Counts
Why emoji cause surprising string length results in Python, JavaScript, and Go — surrogate pairs, grapheme clusters, and how to count correctly.
Emoji Security: Homoglyphs, Spoofing, Invisible Characters, and Filtering
Security risks from emoji in user input: homoglyph spoofing, invisible Unicode characters, emoji in SQL/code injection, and how to filter and sanitize safely.
Emoji Regex Patterns: Matching Emojis in JavaScript and Python
Learn how to write reliable regex patterns to match emojis in JavaScript and Python, including ZWJ sequences, skin tones, and flags.
Handling Emojis in JSON and REST APIs
How to correctly handle emoji in JSON serialization, REST API design, database storage, and HTTP headers — including surrogate pair pitfalls.