Question

121

javascript calling a function on window object

rated 0 times [ 125] [ 4] / answers: 1 / hits: 17691 / 12 Years ago, sat, april 14, 2012, 12:00:00

I have the following code and am wondering how to make the last line work. I addopted a set of api's that current use _view appended as it's namespacing convention and would rather use something like arc.view.$function_name. thx

var arc={};

arc.view={

  say_hello: function(){

    alert(I want to say hello);

  }

}

function say_goodbye(){

  alert(goodbye to you);

}



arc.view.say_hello(); // works

window['say_goodbye'](); // works

// possible to make this work?

window['arc.view.say_hello']();

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georgeh

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answered 12 Years ago billosvaldor · Accepted Answer

window['arc']['view']['say_hello']();

or

window.arc.view.say_hello()

or

window['arc'].view['say_hello']()

Either the dot syntax or the bracket syntax will work. Dot syntax is really just syntactic sugar for a bracket-based property lookup, so all of the above code snippets are identical. Use bracket syntax when the property name itself is a dynamic value, or when using the property name in dot syntax would cause a syntax error. E.g.:

var dynamicMethodName = someObject.getMethodName();

someOtherObject[dynamicMethodName]();

or

someOtherObject[a key string with spaces and {special characters}]();