I'm using this react-beautiful-dnd library to be able to reorder lists. However, even though I'm able to drag and drop and re-order, there is a flicker when I try to move a card from one list to another list I call API when a card is dragged to the destination list
const onDragEnd = (result: any) => {
if (!result.destination) {
return;
}
const listCopy: any = { ...elements };
const sourceList = listCopy[result.source.droppableId];
const [removedElement, newSourceList] = removeFromList(
sourceList,
result.source.index
);
listCopy[result.source.droppableId] = newSourceList;
const destinationList = listCopy[result.destination.droppableId];
listCopy[result.destination.droppableId] = addToList(
result.destination.droppableId,
destinationList || [],
result.destination.index,
removedElement,
result.source.droppableId
);
setElements(listCopy)};
and in addToList function I am calling API to update order on server
const addToList = (
changedList: string,
list: any[],
index: number,
element: any,
currentListId: string
) => {
let cardOrder;
const result = Array.from(list);
result.splice(index, 0, element);
const cardCurrentIndex = result.findIndex((item) => item.id === element.id);
if (list.length === 0) {
cardOrder = DEFAULT_PIPELINE_ORDER;
} else if (cardCurrentIndex === 0 && result.length !== 0) {
const nextCardOrder = result[1];
cardOrder = nextCardOrder.current_stage_order - STAGE_INCREMENT_AMOUNT;
} else if (cardCurrentIndex === result.length - 1) {
const nextCardOrder = result[result.length - 2];
cardOrder = nextCardOrder.current_stage_order + STAGE_INCREMENT_AMOUNT;
} else if (
Boolean(result[cardCurrentIndex - 1]) &&
Boolean(result[cardCurrentIndex + 1])
) {
cardOrder = Math.round(
(result[cardCurrentIndex - 1].current_stage_order +
result[cardCurrentIndex + 1].current_stage_order) /
2
);
}
let candidatesData: any = elements;
if (candidatesData) {
if (currentListId === changedList) {
candidatesData[changedList as any] = result as unknown as elementsType;
setElements([...candidatesData]);
} else {
candidatesData[currentListId as any] = candidatesData[
currentListId as any
]?.filter((item: any) => item.id !== element.id);
candidatesData[changedList as any] = result as unknown as elementsType;
setElements([...candidatesData]);
console.log("[...candidatesData]", [...candidatesData]);
}
}
const stageId = stagePipeLineLanes?.find(
(item) => item.id.toString() === changedList.toLowerCase()
)?.id;
if (
changedList === "applied" ||
changedList === "sourcing" ||
changedList === "interviewing"
) {
const changedDestination = changedList;
const destinationStages = positionDetails?.candidate_stages.filter(
(item) =>
item.pipeline.toLowerCase() === changedDestination.toLowerCase()
);
const stage = destinationStages.find((item) => item.is_default === true);
mutate(
{
candidateId: element.id.toString(),
data: compressObject({
stage: stage?.id.toString(),
}),
},
{
onSuccess: (response) => {
if (response) {
toast.success(
`Candidate moved to ${capitalizeFirstLetter(
changedDestination
)}`
);
}
},
}
);
} else {
mutate({
candidateId: element.id.toString(),
data: compressObject({
stage: stageId?.toString() || "",
current_stage_order: cardOrder?.toString() || "",
}),
});
}
return result;
};