Check functions jQuery extension

/ Published in: jQuery
Save to your folder(s)

Hi, all, this is the "checkFunction" extension for jQuery.

This extension takes two parameters:

1. fPointer
This parameter is the "possible" function to check

1.1 This parameter can be a String that is a function pointer

1.2 This parameter can be a function
ex: function(idUser){alert('Edit User '+idUser);}

1.3 This parameter can be a String that is a function body
ex: "alert('Edit User');"

2. lastFpPointer
This parameter is the function by default if the fpPointer is not a valid function

2.1 This parameter must be a function
ex: function(){}

This extension makes possibles to get any possible representation of a function and detect if it exist.

If it exist return it like a correct function.

If doesn't exist the default function will be returned.

The use of this extension:


- jQuery.checkFunction("EditUser", function(){});

returns EditUser

- jQuery.checkFunction("EditUser ();alert('Edit Launched');", function(){});

returns function(){EditUser ();alert('Edit Launched');}

- jQuery.checkFunction(EditUser, function(){});

returns EditUser


Copy this code and paste it in your HTML
  1. jQuery.extend(jQuery, {
  2. checkFunction: function(fPointer, lastFpPointer){
  3. var newFunction = false;
  4. if(jQuery.isFunction(fPointer)){
  5. newFunction = fPointer;
  6. }else if (/\(.*\)/igm.test(fPointer)){
  7. newFunction = new Function(fPointer);
  8. }else{
  9. try{
  10. var mayBeFunction = (eval(fPointer));
  11. if(jQuery.isFunction(mayBeFunction)){
  12. newFunction = mayBeFunction;
  13. }else{
  14. newFunction = lastFpPointer;
  15. }
  16. }catch(e){
  17. newFunction =lastFpPointer;
  18. }
  19. }
  20. return newFunction;
  21. });

Report this snippet


RSS Icon Subscribe to comments

You need to login to post a comment.