How to pass parameter to a promise function

Wrap your Promise inside a function or it will start to do its job right away. Plus, you can pass parameters to the function:

var some_function = function(username, password){ return new Promise(function(resolve, reject) {  /*stuff using username, password*/  if ( /* everything turned out fine */ )  {   resolve("Stuff worked!");  }  else  {   reject(Error("It broke"));  } });}

Then, use it:

some_module.some_function(username, password).then(function(uid){ // stuff})

ES6:

const some_function = (username, password) =>{ return new Promise((resolve, reject) => {  /*stuff using username, password*/  if ( /* everything turned out fine */ )  {   resolve("Stuff worked!");  }  else  {   reject(Error("It broke"));  } });};

Use:

some_module.some_function(username, password).then(uid =>{ // stuff});

Another way(Must Try):

var promise1 = new Promise(function(resolve, reject) {  resolve('Success!');});var extraData = 'ImExtraData';promise1.then(function(value) {  console.log(value, extraData);  // expected output: "Success!" "ImExtraData"}, extraData);