Description
Reconcile explicit option selected flags for a static single/multiple select; last selected wins in single mode and first defaults, excluding disabled-option and live-dirty-state behavior.
HTML form controls combine attribute values, option state and form-owner references with browser-maintained DOM state. These tools take explicit strings, lists and flags so a particular relationship can be checked in isolation. The supplied-record model does not itself inspect a document or reproduce every browser state transition.
Reconcile explicit option selected flags for a static single/multiple select; last selected wins in single mode and first defaults, excluding disabled-option and live-dirty-state behavior.
When to use this tool
Use this tool to reconcile explicit option selected flags for a static single/multiple select; last selected wins in single mode and first defaults, excluding disabled-option and live-dirty-state behavior.
How to use the tool and how it works
- Enter selected, multiple using the field definitions below.
- Run the operation. Correct input errors before interpreting an output.
- Read result.selectedIndexes. Use the ordering, boundary rules and absence conditions described below.
For multiple selection, return every flagged index. Otherwise retain the last flagged index, default to index zero for a nonempty unselected list, or return an empty list.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| selected | Binary 0/1 selection flags in supplied option order. | Dense list of at most 128 finite numbers; integer/shape constraints above also apply. |
| multiple | Supplied multiple-selection flag. | A boolean true or false. |
| Output field | Interpretation |
|---|---|
| result | Object containing the named fields below. |
| result.selectedIndexes | Zero-based option indexes selected under this simplified supplied-state reconciliation rule. |
{
"input": {
"selected": [
1,
1,
0
],
"multiple": false
},
"output": {
"result": {
"selectedIndexes": [
1
]
}
}
}Limitations and assumptions
- This is the tool’s simplified supplied-state rule; disabled options, display size, DOM mutation and browser algorithms are not modeled.
- All DOM-related facts are supplied by the caller. No element is queried, no browser state is mutated and no document-wide validity or accessibility audit is performed.
- Every declared top-level input field is required and unexpected fields are rejected. Ordinary strings are limited to 8,192 UTF-16 code units and lists to 128 entries, with tighter operation-specific bounds where stated. JSON text has bounded nesting and node counts.
- Numeric outputs must be finite and no larger in absolute magnitude than the safe-integer limit; operations returning exact large integers use decimal text. Positions are zero-based and spans end exclusively unless the operation explicitly states a different convention.
Alternative or Complementary methods
Use DOM inspection or browser constraint-validation APIs when actual document state matters. The supplied-record checks are useful for focused audits but do not replace a complete browser algorithm.
References
Similar or alternative tools
- HTML Select Placeholder Option Check
Check the supplied select placeholder-label-option conditions for a direct first empty-valued option; no DOM or validation state inference.
- HTML Form Associated Owner Reference
Resolve a supplied explicit form attribute before a supplied ancestor form; missing/duplicate owner evidence is retained, no DOM lookup or first-element claim.