22 lines
464 B
JavaScript
22 lines
464 B
JavaScript
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
|
|
var react_1 = require("react");
|
|
|
|
function usePrevious(state, compare) {
|
|
var prevRef = react_1.useRef();
|
|
var curRef = react_1.useRef();
|
|
var needUpdate = typeof compare === 'function' ? compare(curRef.current, state) : true;
|
|
|
|
if (needUpdate) {
|
|
prevRef.current = curRef.current;
|
|
curRef.current = state;
|
|
}
|
|
|
|
return prevRef.current;
|
|
}
|
|
|
|
exports["default"] = usePrevious; |