How to Dynamically Instantiate JavaScript Objects Using a Variable String?

Utilizing Variable String to Instantiate JavaScript Object

In JavaScript, we often encounter scenarios where we need to dynamically instantiate objects using a variable string containing the class name. While the presented pseudo-code may appear intuitive, it encounters limitations. Here's an alternative approach using the window object:

Solution:

var classNameString = 'MyClass';
var myObject = window[classNameString];

In JavaScript, the window object serves as a global registry for variables and objects defined within the scope of the current window or browser context. By accessing the window object using the bracket notation ([ ]), we can dynamically retrieve the value associated with the string classNameString. In this case, it resolves to the MyClass class itself. By instantiating the object as myObject = window[classNameString], we essentially bypass the need to hard-code the class name and instead dynamically assign it based on the variable string.

This solution proves particularly useful in situations where the class name is dynamically generated or stored in a variable, making it flexible and adaptable to various scenarios.

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