Passing arguments forward to another javascript function

Question

I ve tried the following with no success   function a args       b arguments      function b args          arguments are lost     a 1 2 3     In function a  I can use the arguments keyword to access an array of arguments  in function b these are lost  Is there a way of passing arguments to another javascript function like I try to do

User · Answer

try this  function global func    args     for let i of args       console log i          global func  task name    action     x   x    x   x      x   x      x1   x2    1  null  undefined  false  true        task name   action    2                                         x  x             2               x1              x2            1   null   undefined   false   true   func

User · Answer

If you want to only pass certain arguments  you can do so like this  Foo bar TheClass   theMethod    arg1    arg2    Foo js bar  obj  method     args      obj method     args     obj and method are used by the bar   method  while the rest of args are passed to the actual call

User · Answer

The explanation that none of the other answers supplies is that the original arguments are still available  but not in the original position in the arguments object     The arguments object contains one element for each actual parameter provided to the function  When you call a you supply three arguments  the numbers 1  2  and  3  So  arguments contains  1  2  3    function a args       console log arguments      1  2  3      b arguments       When you call b  however  you pass exactly one argument  a s arguments object  So arguments contains   1  2  3    i e  one element  which is a s arguments object  which has properties containing the original arguments to a    function b args          arguments are lost      console log arguments       1  2  3      a 1 2 3     As  Nick demonstrated  you can use apply to provide a set arguments object in the call   The following achieves the same result   function a args       b arguments 0   arguments 1   arguments 2       three arguments     But apply is the correct solution in the general case

User · Answer

Spread operator     The spread operator allows an expression to be expanded in places where multiple arguments  for function calls  or multiple elements  for array literals  are expected    ECMAScript ES6 added a new operator that lets you do this in a more practical way     Spread Operator   Example without using the apply method    x000D   x000D  function a    args   x000D    b    args   x000D    b 6     args  8     You can even add more elements x000D    x000D  function b    x000D    console log arguments  x000D    x000D   x000D  a 1  2  3  x000D   x000D   x000D    Note This snippet returns a syntax error if your browser still uses ES5   Editor s note  Since the snippet uses console log    you must open your browser s JS console to see the result - there will be no in-page result   It will display this result     In short  the spread operator can be used for different purposes if you re using arrays  so it can also be used for function arguments  you can see a similar example explained in the official docs  Rest parameters

User · Answer

Use  apply   to have the same access to arguments in function b  like this   function a        b apply null  arguments     function b       alert arguments     arguments 0    1  etc   a 1 2 3      You can test it out here

[javascript] Passing arguments forward to another javascript function

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