HTML Attribute Quote Choice Budget
Compare serialized UTF-16 budgets for single- and double-quoted escaped HTML attribute values, including surrounding quotes; not a security or byte-size guarantee.
Description
Compare serialized UTF-16 budgets for single- and double-quoted escaped HTML attribute values, including surrounding quotes; not a security or byte-size guarantee.
The quote style chosen for an HTML attribute changes how many characters need escaping. This tool compares two serialized UTF-16 lengths, including the surrounding quotes.
When to use this tool
Compare serialized UTF-16 budgets for single- and double-quoted escaped HTML attribute values, including surrounding quotes; not a security or byte-size guarantee.
- Prepare the supplied value fields for this operation.
- Compare the complete example with the representation used by your own input before carrying the result into another step.
How to use the tool and how it works
- Enter value. Use the exact text syntax, units and index conventions explained below.
- Run the tool. If input validation fails, correct the supplied fields before interpreting any result.
- Read result.doubleLength, result.singleLength, result.preferred, result.tie. Interpret false, null and empty lists using the distinctions below; they can be valid outputs.
Escape the value separately for single and double quotes, including ampersands and angle brackets. Add two to each escaped string length, choose the shorter style and prefer double on a tie. Reject NUL input.1
| Input field | Meaning and representation | Accepted input |
|---|---|---|
| value | value. | Text; at most 8,192 UTF-16 code units, subject to the grammar above |
| Output field | Interpretation |
|---|---|
| result | Object containing the named outputs below. |
| result.doubleLength | The double length value under the stated formula or text convention. |
| result.singleLength | The single length value under the stated formula or text convention. |
| result.preferred | The quote style with the shorter escaped UTF-16 value; double wins ties. |
| result.tie | Flag for tie under the exact condition described above. |
{
"input": {
"value": "\"x\""
},
"output": {
"result": {
"doubleLength": 15,
"singleLength": 5,
"preferred": "single",
"tie": false
}
}
}Limitations and assumptions
- Lengths count UTF-16 code units, not encoded bytes. The comparison does not establish that the attribute's content is safe in a URL, script or style context.
- All declared input fields are required and unexpected top-level fields are rejected. Numbers must be finite; lists are limited to 128 entries and ordinary text fields to 8,192 UTF-16 code units, with tighter limits where stated.
- JSON text inputs must parse within bounded nesting and size limits. Numeric outputs outside the safe finite range are rejected; large exact integer results use decimal strings. Indexes and half-open spans are zero-based unless a rank is explicitly described as one-based.
Alternative or Complementary methods
For actual document behavior, inspect a parsed DOM and the relevant HTML algorithm. These tools transform supplied tokens, observations or coordinates; compare the browser result when parsing or layout matters.
References
Similar or alternative tools
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