function describeID(id: DebugID): string {
const name = ReactComponentTreeHook.getDisplayName(id);
const element = ReactComponentTreeHook.getElement(id);
const ownerID = ReactComponentTreeHook.getOwnerID(id);
let ownerName;
if (ownerID) {
ownerName = ReactComponentTreeHook.getDisplayName(ownerID);
}
warning(
element,
'ReactComponentTreeHook: Missing React element for debugID %s when ' +
'building stack',
id
);
return describeComponentFrame(name || '', element && element._source, ownerName || '');
}
unmountedIDs.length = 0;
},
isMounted(id: DebugID): boolean {
var item = getItem(id);
return item ? item.isMounted : false;
},
getCurrentStackAddendum(topElement: ?ReactElement): string {
var info = '';
if (topElement) {
var name = getDisplayName(topElement);
var owner = topElement._owner;
info += describeComponentFrame(
name,
topElement._source,
owner && getComponentName(owner)
);
}
var currentOwner = ReactCurrentOwner.current;
if (currentOwner) {
if (typeof currentOwner.tag === 'number') {
const workInProgress = ((currentOwner : any) : Fiber);
// Safe because if current owner exists, we are reconciling,
// and it is guaranteed to be the work-in-progress version.
info += getStackAddendumByWorkInProgressFiber(workInProgress);
} else if (typeof currentOwner._debugID === 'number') {
info += ReactComponentTreeHook.getStackAddendumByID(currentOwner._debugID);
}
}