How Many Arguments Can JavaScript Functions Really Take?

Are There Limits to the Number of Arguments JavaScript Functions Can Accept?

While it's commonly understood that JavaScript functions can accept an "unlimited" number of arguments, the practical reality is more nuanced.

The ECMAScript specification doesn't explicitly impose a maximum argument limit. However, the actual limit depends on implementation-specific factors.

An experiment using the arguments.length method revealed practical limits for different browsers:

• Chrome: 65,535 arguments (max stack size exceeded)
• Firefox: 262,143 arguments (too large arguments)
• Internet Explorer: 131,071 arguments (out of stack space)
• Opera: 1,048,576 arguments (too large arg array)

Using eval to call the function yielded slightly different results:

• Chrome: 32,767 arguments (too many arguments)
• Firefox: 32,767 arguments (script too large)
• Internet Explorer: 32,767 arguments (out of memory)
• Opera: 4,194,303 arguments (out of memory)

These results indicate that the maximum number of arguments varies based on the browser and calling strategy. In practical scenarios, it's unlikely to encounter function calls with millions of arguments.

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