rc-hooks/lib/useUnmountedRef/index.js

React Hooks Library.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var react_1 = require("react");
/**
 * 用于异步回调中判断当前组件是否卸载。
 *
 * 如果组件卸载就不更新状态，避免因组件卸载后更新状态而导致的内存泄漏。
 *
 * @returns 返回一个 `ref`。如果组件卸载，值为 `true`，否则值为 `false`。
 * @example
 * const unmountedRef = useUnmountedRef();
 */
var useUnmountedRef = function () {
    var unmountedRef = (0, react_1.useRef)(false);
    (0, react_1.useEffect)(function () {
        unmountedRef.current = false;
        return function () {
            unmountedRef.current = true;
        };
    }, []);
    return unmountedRef;
};
exports.default = useUnmountedRef;