How Can I Safely Execute JavaScript Code from a String?

Invoking JavaScript Code Housed within a String

Harnessing JavaScript code stored as a string often poses the question of how to execute it effectively. One solution lies in the eval function.

Consider the example provided:

function ExecuteJavascriptString()
{
    var s = "alert('hello')";
    // how do I get a browser to alert('hello')?
}

To execute the provided JavaScript code string, you can employ the eval function as follows:

eval(s);

However, it is crucial to exercise caution when using the eval function. As the MDN documentation aptly cautions:

Warning: Executing JavaScript from a string is an enormous security risk. It is far too easy for a bad actor to run arbitrary code when you use eval(). [...]

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