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How to call a function from a string stored in a variable?

There are two methods to call a function from a string stored in a variable. Note: The eval () method is older and is deprecated. Method 1: Using the window object. The window object in HTML 5 references the current window and all items contained in it. Hence we can use it to run a function in a string along with parameters to the function. Syntax:

Why should I avoid calling a function by string in JavaScript?

One should try to avoid calling a function by string in JavaScript for two reasons: Reason 1: Some code obfuscators will wreck your code as they will change the function names, making the string invalid. Reason 2: It is much harder to maintain code that uses this methodology as it is much harder to locate usages of the methods called by a string.

How to access a function using a string in JavaScript?

@uptownhr window.settings.functionName does. window[window.settings.functionName] does now. In javascript, object members can be access with a string the same way you do with an array. Assuming your function is declared in the global scope, it become a function in the window object. You can call it using a string.

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