Function warnOnInvalidKey

bundle.js:7129–7129

* Warns if there is a duplicate or missing key

(child,knownKeys)

var _matchedFiber3=existingChildren.get(newIdx)||null;return updateYield(returnFiber,_matchedFiber3,newChild,priority);}case REACT_PORTAL_TYPE:{var _matchedFiber4=existingChildren.get(newChild.key===null?newIdx:newChild.key)||null;return updatePortal(returnFiber,_matchedFiber4,newChild,priority);}}if(isArray(newChild)||getIteratorFn(newChild)){var _matchedFiber5=existingChildren.get(newIdx)||null;return updateFragment(returnFiber,_matchedFiber5,newChild,priority);}throwOnInvalidObjectType(returnFiber,newChild);}{if(typeof newChild==='function'){warnOnFunctionType();}}return null;}/**
   * Warns if there is a duplicate or missing key
   */function warnOnInvalidKey(child,knownKeys){{if((typeof child==='undefined'?'undefined':_typeof(child))!=='object'||child===null){return knownKeys;}switch(child.$$typeof){case REACT_ELEMENT_TYPE:case REACT_COROUTINE_TYPE:case REACT_PORTAL_TYPE:warnForMissingKey(child);var key=child.key;if(typeof key!=='string'){break;}if(knownKeys===null){knownKeys=new Set();knownKeys.add(key);break;}if(!knownKeys.has(key)){knownKeys.add(key);break;}warning$24(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$5());break;default:break;}}return knownKeys;}function reconcileChildrenArray(returnFiber,currentFirstChild,newChildren,priority){// This algorithm can't optimize by searching from boths ends since we
// don't have backpointers on fibers. I'm trying to see how far we can get
// with that model. If it ends up not being worth the tradeoffs, we can
// add it later.