How to pass parameter to a promise function

Question

this might seem a silly question but I am a newbie in this topic  I am working on promises on node js  And I want to pass parameter to a promise function  However I could not figure it out   someModule someFunction then username  password function uid        stuff        and the function is something like  var someFunction   new Promise username  password  function resolve  reject        stuff using username  password     if      everything turned out fine            resolve  Stuff worked         else       reject Error  It broke

User · Answer

You can use  bind   to pass the param this  to the function   var someFunction  function resolve  reject         get username  password     var username this username    var password this password    if      everything turned out fine            resolve  Stuff worked         else       reject Error  It broke           var promise new Promise someFunction bind  username  your username  password  your password

User · Answer

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  quot Stuff worked  quot          else        reject Error  quot It broke quot                 Then  use it  some module some function username  password  then function uid        stuff        ES6  const some function    username  password    gt     return new Promise  resolve  reject    gt         stuff using username  password      if      everything turned out fine             resolve  quot Stuff worked  quot          else        reject Error  quot It broke quot                  Use  some module some function username  password  then uid   gt        stuff

User · Answer

Another way Must Try    x000D   x000D  var promise1   new Promise function resolve  reject    x000D    resolve  Success     x000D      x000D  var extraData    ImExtraData   x000D  promise1 then function value    x000D    console log value  extraData   x000D       expected output   Success    ImExtraData  x000D     extraData   x000D   x000D   x000D

User · Answer

Even shorter var foo    user  pass    gt    new Promise  resolve  reject    gt        if     condition             resolve  quot Fine quot          else         reject  quot Error message quot                 foo user  pass  then result   gt         process

User · Answer

Try this  function someFunction username  password          return new Promise  resolve  reject    gt               Do something with the params username and password            if      everything turned out fine                  resolve  quot Stuff worked  quot              else             reject Error  quot It didn t work  quot                                        someFunction username  password         then  result    gt               Do something                    catch  err    gt               Handle the error

[javascript] How to pass parameter to a promise function

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