30 lines
1.3 KiB
JavaScript
30 lines
1.3 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;
|
||
|
|
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.default = useDiffItem;
|
||
|
|
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
|
||
|
|
var React = _interopRequireWildcard(require("react"));
|
||
|
|
var _algorithmUtil = require("../utils/algorithmUtil");
|
||
|
|
function useDiffItem(data, getKey, onDiff) {
|
||
|
|
var _React$useState = React.useState(data),
|
||
|
|
_React$useState2 = (0, _slicedToArray2.default)(_React$useState, 2),
|
||
|
|
prevData = _React$useState2[0],
|
||
|
|
setPrevData = _React$useState2[1];
|
||
|
|
var _React$useState3 = React.useState(null),
|
||
|
|
_React$useState4 = (0, _slicedToArray2.default)(_React$useState3, 2),
|
||
|
|
diffItem = _React$useState4[0],
|
||
|
|
setDiffItem = _React$useState4[1];
|
||
|
|
React.useEffect(function () {
|
||
|
|
var diff = (0, _algorithmUtil.findListDiffIndex)(prevData || [], data || [], getKey);
|
||
|
|
if ((diff === null || diff === void 0 ? void 0 : diff.index) !== undefined) {
|
||
|
|
onDiff === null || onDiff === void 0 ? void 0 : onDiff(diff.index);
|
||
|
|
setDiffItem(data[diff.index]);
|
||
|
|
}
|
||
|
|
setPrevData(data);
|
||
|
|
}, [data]);
|
||
|
|
return [diffItem];
|
||
|
|
}
|