Description
Require a Unicode scalar codepoint and return its JavaScript braced Unicode escape spelling, backslash-u followed by the hexadecimal point inside braces.
Unicode scalar values are distinct from UTF-8 bytes and UTF-16 code units. One scalar can require several units, and printable escape text is a representation of those values rather than execution or normalization of a string.
Require a Unicode scalar codepoint and return its JavaScript braced Unicode escape spelling, backslash-u followed by the hexadecimal point inside braces.
When to use this tool
Use Encoding: Unicode Code Point Js Escape when inspecting one scalar, code-unit layout or literal escape representation.
How to use the tool and how it works
- Enter codepoint. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read result. Expand result to inspect the returned fields.
Require a Unicode scalar codepoint and return its JavaScript braced Unicode escape spelling, backslash-u followed by the hexadecimal point inside braces.1
UTF-16 distinguishes scalar values from code units and represents supplementary scalars with a surrogate pair. Literal escape text is a separate representation.2
| Input field | Meaning and units | Accepted input |
|---|---|---|
| codepoint | Codepoint | Required. Safe integer. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| result | Object containing the named calculated members below. | Required. Object. |
| result.escape | Escape | Calculated result member: string. |
{
"input": {
"codepoint": 128512
},
"output": {
"result": {
"escape": "\\u{1F600}"
}
}
}Limitations and assumptions
- This emits text for one scalar, not an executable script, an escaped whole string or a normalization operation. Surrogates are rejected.
- Outputs are nested inside result. Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a full Unicode encoder or parser when processing strings, and handle normalization, graphemes and context-specific escaping separately.
References
-
Calculation and input contract: encode/unicode-code-point-js-escape — tool.io
-
The Unicode Standard: core definitions and UTF-16 — Unicode Consortium
Similar or alternative tools
- Encoding: Html Numeric Reference Scalar
Return a semicolon-terminated numeric character-reference spelling using decimal digits or the hexadecimal x form.
- Encoding: Utf16 Surrogate Pair Codepoint Tool
Encode one Unicode scalar as one BMP UTF-16 unit or an ordered high/low surrogate pair, rejecting surrogate code points.