JSミドルパッケージapiは処理プロセスを呼び出して、複雑な作業の山に結合します.

class Middleware {
    constructor({ core, params }) {
        //      axios
        this.core = core;
        //    axios  
        this.params = params;
        //             
        this.cache = [];
    }
    use(fn) {
        if (typeof fn !== "function") {
            throw "middleware must be a function";
        }
        this.cache.push(fn);
        return this;
    }
    next(data) {
        if (this.middlewares && this.middlewares.length > 0) {
            var ware = this.middlewares.shift();
            ware.call(this, this.next.bind(this), data);
        }
        return data;
    }
    async go() {
        //       ，        
        let result = await this.core(this.params);
        //    ，   
        this.middlewares = this.cache.map(function(fn) {
            return fn;
        });
        //       ，            
        this.next(result);
    }
}

//     
var onion = new Middleware({core: request, params});
onion.use(function (next, data) {
    console.log(1);
    console.log(data);
    //       
    next(data);
    console.log("1  ");
});
onion.use(function (next, data) {
    console.log(2);
    console.log(data);
    //       
    next(data);
    console.log("2  ");
});
onion.use(function (next, data) {
    console.log(3);
    console.log(data);
    console.log("3  ");
});
//        next，         
onion.use(function (next, data) {
    console.log(4);
    next(data);
    console.log("4  ");
});
onion.go();
// 1
// {a: 1, b: 2}
// 2
// {a: 1, b: 2, c: 3}
// 3
// {a: 1, b: 2, c: 3, d: 4}
// 3  
// 2  
// 1  
// {a: 1, b: 2, c: 3, d: 4}

function handleStatus(next, res) {
    console.log(res);
    next(res);
}
function handleAuth(next, res) {
    console.log(res);
    next(res);
}
function handlePosition(next, res) {
    console.log(res);
    next(res);
}
function handleForbiddenList(next, res) {
    console.log(res);
    next(res);
}
function handleLoad(next, res) {
    console.log(res);
    next(res);
}

//     
var onion = new Middleware({core: request, params});
onion.use(handleStatus);
onion.use(handleAuth);
onion.use(handlePosition);
onion.use(handleForbiddenList);
onion.use(handleLoad);
onion.go();
//            ，            
// let res = await onion.go();