Javascript Web Worker未返回执行操作的结果

我有一个web worker没有返回执行计算的结果，该方法如下所示：

 self.checkIntersectionForLayerWith = function checkIntersectionForLayerWith(data) {

var checkIntersectionForLayer = function checkIntersectionForLayer() {

    var checkEachConflict = function checkEachConflict(feature){

        var conflict = turf.intersect(feature,data.rectFeature);

            if(conflict != null) {
                _.extend(conflict.properties,feature.properties);
                conflict.id = feature.id;
            }

            return conflict;
        };

    var intersectiontest = self._(data.features)
                                .map(checkEachConflict)
                                .pull(void 0)
                                .thru(self.turf.featurecollection)
                                .value();

    return {
            layerLabel:data.layerLabel,
            query:data.rectFeature,
            result:data.intersectiontest
        };


};

return checkIntersectionForLayer;
}; 

    self.startQuery = function startQuery(data) {

    if(data != null) {
        var checkIntersectionForLayer = self.checkIntersectionForLayerWith(data);
        var result = checkIntersectionForLayer();
        var payload = {
                type:'rectangle_query_worker_result',
                result:result
        };
        self.postMessage(payload);
    }
};

self.onmessage = function startQueryWorker(e) {
    if(e.data.type === 'start') {
        console.log("Inside the web worker,",e,e.data,e.data.payload);
        self.startQuery(e.data.payload);
    }
    else if(e.data.type === 'setup') { 
        self.setup();
    }
};

self.setup = function setup() {

    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/turf.js');
    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/lodash.compat.min.js');
};

我这样调用该方法：

 self.checkIntersectionForLayerWith = function checkIntersectionForLayerWith(data) {

var checkIntersectionForLayer = function checkIntersectionForLayer() {

    var checkEachConflict = function checkEachConflict(feature){

        var conflict = turf.intersect(feature,data.rectFeature);

            if(conflict != null) {
                _.extend(conflict.properties,feature.properties);
                conflict.id = feature.id;
            }

            return conflict;
        };

    var intersectiontest = self._(data.features)
                                .map(checkEachConflict)
                                .pull(void 0)
                                .thru(self.turf.featurecollection)
                                .value();

    return {
            layerLabel:data.layerLabel,
            query:data.rectFeature,
            result:data.intersectiontest
        };


};

return checkIntersectionForLayer;
}; 

    self.startQuery = function startQuery(data) {

    if(data != null) {
        var checkIntersectionForLayer = self.checkIntersectionForLayerWith(data);
        var result = checkIntersectionForLayer();
        var payload = {
                type:'rectangle_query_worker_result',
                result:result
        };
        self.postMessage(payload);
    }
};

self.onmessage = function startQueryWorker(e) {
    if(e.data.type === 'start') {
        console.log("Inside the web worker,",e,e.data,e.data.payload);
        self.startQuery(e.data.payload);
    }
    else if(e.data.type === 'setup') { 
        self.setup();
    }
};

self.setup = function setup() {

    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/turf.js');
    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/lodash.compat.min.js');
};

我这样称呼nessecary库：

 self.checkIntersectionForLayerWith = function checkIntersectionForLayerWith(data) {

var checkIntersectionForLayer = function checkIntersectionForLayer() {

    var checkEachConflict = function checkEachConflict(feature){

        var conflict = turf.intersect(feature,data.rectFeature);

            if(conflict != null) {
                _.extend(conflict.properties,feature.properties);
                conflict.id = feature.id;
            }

            return conflict;
        };

    var intersectiontest = self._(data.features)
                                .map(checkEachConflict)
                                .pull(void 0)
                                .thru(self.turf.featurecollection)
                                .value();

    return {
            layerLabel:data.layerLabel,
            query:data.rectFeature,
            result:data.intersectiontest
        };


};

return checkIntersectionForLayer;
}; 

    self.startQuery = function startQuery(data) {

    if(data != null) {
        var checkIntersectionForLayer = self.checkIntersectionForLayerWith(data);
        var result = checkIntersectionForLayer();
        var payload = {
                type:'rectangle_query_worker_result',
                result:result
        };
        self.postMessage(payload);
    }
};

self.onmessage = function startQueryWorker(e) {
    if(e.data.type === 'start') {
        console.log("Inside the web worker,",e,e.data,e.data.payload);
        self.startQuery(e.data.payload);
    }
    else if(e.data.type === 'setup') { 
        self.setup();
    }
};

self.setup = function setup() {

    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/turf.js');
    importScripts('/MapErpMobileDev/leaflet/mobile/js/lib/lodash.compat.min.js');
};

---

这和承诺有什么关系？什么是“不回来”？你的意思是说

e.data.payload

为

null

并且从不调用

postMessage

？或者只是

intersectiontest

？另外，

.pull（void 0）

相当于

。pull（未定义）

但是

.map（）

似乎不太可能返回稀疏数组。空值更可能由

checkeeAchConflict（）

中的代码指示。试试

.pull（null）

或者，皮带和背带，

。pull（null，void 0）

。啊，好的。我会更乐意使用null，所以尝试

var conflict=turp.intersect（feature，data.rectFeature）| null

和

.pull（null）

。可能没什么区别，但更干净。