如何在助手函数中以干净的方式访问cheerio的`$`?

我对JavaScript相当陌生,我正在尝试重构它

const rp = require('request-promise');
const cheerio = require('cheerio'); // Basically jQuery for node.js

// shared function
function getPage(url) {
    const options = {
        uri: url,
        transform: function(body) {
          return cheerio.load(body);
        }
    };
    return rp(options);
}

getPage('https://friendspage.org').then($ => {

    // Processing 1
    const nxtPage = $("a[data-url$='nxtPageId']").attr('data');


    return getPage(nxtPage).then($ => {

        // Processing 2

    });
}).catch(err => {
    console.log(err);
    // error handling here
});

变成这样:

const rp = require('request-promise');
const cheerio = require('cheerio'); // Basically jQuery for node.js

// shared function
function getPage(url) {
    const options = {
        uri: url,
        transform: function(body) {
          return cheerio.load(body);
        }
    };
    return rp(options);
}

function process1(args) {
    // Processing 1
    return $("a[data-url$='nxtPageId']").attr('data');

}

function process2(args) {
    // Processing 2
}

getPage('https://friendspage.org').then($ => {

    const nxtPage = process1(args);        

    return getPage(nxtPage).then($ => {

        process2(args);

    });
}).catch(err => {
    console.log(err);
    // error handling here
});

但这样做会让我犯错误 $ is not defined . 经过 $ 和…在一起 args

{ RequestError: Error: options.uri is a required argument
    at new RequestError (C:\Users\Skillzore\git\projects\gadl\node_modules\request-promise-core\lib\errors.js:14:15)
    at Request.plumbing.callback (C:\Users\Skillzore\git\projects\gadl\node_modules\request-promise-core\lib\plumbing.js:87:29)
    at Request.RP$callback [as _callback] (C:\Users\Skillzore\git\projects\gadl\node_modules\request-promise-core\lib\plumbing.js:46:31)
    at self.callback (C:\Users\Skillzore\git\projects\gadl\node_modules\request\request.js:185:22)
    at Request.emit (events.js:182:13)
...

它打印出一个大的物体,上面有几个这样的错误。 $