Dynamically call function in javascript [duplicate]

Question

I rather have a seemingly trivial issue, but am not able to figure out an efficient approach.

I have a list of about 50 functions to be called such as :

globalClient.funcA(...)
globalClient.funcB(...)
globalClient.funcC(...)

My code should ideally dynamically create the name of the function (funcA / funcB/ funcC and then proceed to actually call that function. My approach below does not work (please note that these aren't exactly the actual names of the functions. I'm only giving these arbitrary names for simplicity of understanding):

var functionName = 'func'.concat('A');
globalClient.functionName

The second line is where it errors out. Now JS thinks that functionName itself is the name of the function. What I want it to do is resolve functionName to funcA and then call globalClient.funcA(...) instead.

I've thought about implementing a switch / case for this but I'm sure there is a far simpler appraoch. Any ideas?

take a look at this stackoverflow.com/questions/359788/…. I hope this is what you are looking for — gkb
– gkb, Commented Oct 24, 2016 at 7:04
Thanks all. I tried searching here but I couldn't figure out the right terminology for it. I've got the answer. I'll mark it so that this question can be closed. — blueren
– blueren, Commented Oct 24, 2016 at 7:13

Nina Scholz · Accepted Answer · 2016-10-24 07:01:40Z

4

You could use the bracket notation as property accessor.

globalClient[functionName]()

answered Oct 24, 2016 at 7:01

Nina Scholz

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1 Comment

blueren Over a year ago

Brilliant. Thanks for this.

Suren Srapyan · Accepted Answer · 2016-10-24 07:02:21Z

1

You can use the [ ] operator for accessing the properties.

var globalClient = {
  funcA: function(){
    console.log('funcA is called');
  }
}

var functionName = 'func'.concat('A');
globalClient[functionName]();

answered Oct 24, 2016 at 7:02

Suren Srapyan

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