* Warns if there is a duplicate or missing key
(child, knownKeys)
| 9252 | * Warns if there is a duplicate or missing key |
| 9253 | */ |
| 9254 | function warnOnInvalidKey(child, knownKeys) { |
| 9255 | { |
| 9256 | if (typeof child !== 'object' || child === null) { |
| 9257 | return knownKeys; |
| 9258 | } |
| 9259 | switch (child.$$typeof) { |
| 9260 | case REACT_ELEMENT_TYPE: |
| 9261 | case REACT_PORTAL_TYPE: |
| 9262 | warnForMissingKey(child); |
| 9263 | var key = child.key; |
| 9264 | if (typeof key !== 'string') { |
| 9265 | break; |
| 9266 | } |
| 9267 | if (knownKeys === null) { |
| 9268 | knownKeys = new Set(); |
| 9269 | knownKeys.add(key); |
| 9270 | break; |
| 9271 | } |
| 9272 | if (!knownKeys.has(key)) { |
| 9273 | knownKeys.add(key); |
| 9274 | break; |
| 9275 | } |
| 9276 | 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()); |
| 9277 | break; |
| 9278 | default: |
| 9279 | break; |
| 9280 | } |
| 9281 | } |
| 9282 | return knownKeys; |
| 9283 | } |
| 9284 | |
| 9285 | function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, expirationTime) { |
| 9286 | // This algorithm can't optimize by searching from boths ends since we |
no test coverage detected