How Can I Dynamically Assign JavaScript Variables Using Strings?

Converting Strings to Variable Names in JavaScript

When passing strings into a function, developers often encounter the challenge of setting the corresponding variable within the function. This article presents a solution using the window object to dynamically access global variables by their string names.

Specifically, to set the variable onlyVideo within the function, the following code can be used:

window["onlyVideo"] = something;

This approach allows the dynamic assignment of variables based on strings, eliminating the need for hard-coded if statements.

As an alternative, JavaScript objects provide a more robust mechanism for managing and accessing properties by their string names. A simple example demonstrates how to create and manipulate JavaScript objects:

// create JavaScript object
var obj = { "key1": 1 };

// assign - set "key2" to 2
obj.key2 = 2;

// read values
console.log(obj.key1 === 1);
console.log(obj.key2 === 2);

// read values with a string, same result as above
// but works with special characters and spaces
// and of course variables
console.log(obj["key1"] === 1);
console.log(obj["key2"] === 2);

// read with a variable
var key1Str = "key1";
console.log(obj[key1Str] === 1);

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