NodeJS：引用多個模塊中的相同變量

Question

在節點中，我創建了一個通過websockets連接到模塊的模塊實例。我用const slackbot = new SlackBot()這樣做。我如何設置，以便我可以在幾個不同的模塊中引用相同的slackbot？每次我想在模塊中調用slackbot時，最好的方法就是將模塊函數傳遞給模塊函數？這樣做的

const slackbot = new SlackBot(); 

someModule.doThing(data, slackbot) 
.then((response) => { 
    otherModule.doAnotherThing(response, slackbot); 
}) 
.then((response) => { 
    someModule.wrapUp(response, slackbot); 
}); 

Answer 1

一種方法是

/** slacbot.js */ 
const slackbot = new SlackBot(); 

someModule.doThing(data, slackbot) 
.then((response) => { 
    otherModule.doAnotherThing(response, slackbot); 
}) 
.then((response) => { 
    someModule.wrapUp(response, slackbot); 
}); 

// getter  
var getSlackBot = function(){ 
    if(slackBot) return slackBot 
    else { 
    slackbot = new SlackBot(); 
    return slackbot; 
    } 
} 

module.exports.getSlackBot = getSlackBot; 


/** consumer.js **/ 
var slackBot = require('slackBot').getSlackBot();