conformance · v145
v145 · upsert — conformance probe
7 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.
0
pass
0
fail
0
blocked
7
total
| id | contract | kind | verdict | detail |
|---|---|---|---|---|
map-get-or-insert-is-function |
Map.prototype.getOrInsert is a function — inserts the value if the key is absent, otherwise returns the existing. spec ↗ | typeof | … | |
map-get-or-insert-computed-is-function |
Map.prototype.getOrInsertComputed is a function — the computed-value variant that only invokes the callback on miss. spec ↗ | typeof | … | |
map-get-or-insert-inserts-on-miss |
getOrInsert on a missing key returns the inserted value and writes it to the Map. spec ↗ | script | … | |
map-get-or-insert-preserves-on-hit |
getOrInsert on an existing key returns the existing value, not the supplied one. spec ↗ | script | … | |
map-get-or-insert-computed-only-on-miss |
getOrInsertComputed only invokes its callback for missing keys. spec ↗ | script | … | |
weak-map-get-or-insert-is-function |
WeakMap.prototype.getOrInsert is a function — proposal extends to WeakMap too. spec ↗ | typeof | … | |
weak-map-get-or-insert-computed-is-function |
WeakMap.prototype.getOrInsertComputed is a function. spec ↗ | typeof | … |