* Warns if there is a duplicate or missing key
(child, knownKeys)
| 9468 | * Warns if there is a duplicate or missing key |
| 9469 | */ |
| 9470 | function warnOnInvalidKey(child, knownKeys) { |
| 9471 | { |
| 9472 | if (typeof child !== 'object' || child === null) { |
| 9473 | return knownKeys; |
| 9474 | } |
| 9475 | switch (child.$$typeof) { |
| 9476 | case REACT_ELEMENT_TYPE: |
| 9477 | case REACT_PORTAL_TYPE: |
| 9478 | warnForMissingKey(child); |
| 9479 | var key = child.key; |
| 9480 | if (typeof key !== 'string') { |
| 9481 | break; |
| 9482 | } |
| 9483 | if (knownKeys === null) { |
| 9484 | knownKeys = new Set(); |
| 9485 | knownKeys.add(key); |
| 9486 | break; |
| 9487 | } |
| 9488 | if (!knownKeys.has(key)) { |
| 9489 | knownKeys.add(key); |
| 9490 | break; |
| 9491 | } |
| 9492 | warning(false, 'Encountered two children with the same key, `%s`. ' + 'Keys should be unique so that components maintain their identity ' + 'across updates. Non-unique keys may cause children to be ' + 'duplicated and/or omitted — the behavior is unsupported and ' + 'could change in a future version.%s', key, getCurrentFiberStackAddendum$2()); |
| 9493 | break; |
| 9494 | default: |
| 9495 | break; |
| 9496 | } |
| 9497 | } |
| 9498 | return knownKeys; |
| 9499 | } |
| 9500 | |
| 9501 | function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, expirationTime) { |
| 9502 | // This algorithm can't optimize by searching from boths ends since we |
no test coverage detected