@nutui/nutui-react/dist/cjs/hooks/use-watch.js

京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
Object.defineProperty(exports, "default", {
    enumerable: true,
    get: function() {
        return _default;
    }
});
var _react = require("react");
function useWatch(dep, callback) {
    var config = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : {
        immediate: false
    };
    var immediate = config.immediate;
    var prev = (0, _react.useRef)();
    var inited = (0, _react.useRef)(false);
    var stop = (0, _react.useRef)(false);
    (0, _react.useEffect)(function() {
        var execute = function execute() {
            return callback(prev.current);
        };
        if (!stop.current) {
            if (!inited.current) {
                inited.current = true;
                if (immediate) {
                    execute();
                }
            } else {
                execute();
            }
            prev.current = dep;
        }
    }, [
        dep
    ]);
    return function() {
        stop.current = true;
    };
}
var _default = useWatch;