CODEWITHSUNDEEP
javascript
CodeOverload
CodeOverload

Reputation: 48565

Call a javascript function with arguments as an array

I'm trying to execute a function from a string along with an array which should be treated as multiple arguments.

Example:

var app = {
  bar : function(val1, val2, val4){
    console.log(val1+val2+val3);
  }
};

fn_name = "bar";
fn_args = ['one', 'two', 'three'];

app[fn_name](fn_args);

The issue with this code is that the fn_args is being passed as one single argument rather than spread as separate arguments, Is there a work around? i still want to pass fn_name and fn_args dynamically.

Upvotes: 1

Views: 96

Answers (2)

Graham
Graham

Reputation: 6572

Use function.apply().

app[fn_name].apply(app, fn_args);

The first arguument is the context (this) inside the function, and the second is the array whose items should be passed as arguments.

Upvotes: 1

clyfe
clyfe

Reputation: 23770

Use the apply method:

app[fn_name].apply(app, fn_args);

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/apply

Upvotes: 2

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