JSX: Function replace is undefined? What

Question

Turns out, the regex's replace function is not supported in my current attempt to understand the ESTK "tool".

Code as simple as:

beta = beta.replace(/\s\s*$/, "");

Same with others replace(). And it's undefined!! I'm assuming match() and others are as well. Syntax, debug and everything is set to javascript. I tried both connected to Ae and otherwise.

What am I missing?

Mathias Moehl · Answer

The replace function is defined for strings, hence, most likely in your code you didn't ensure that beta is a string.

// works
var beta = "foo    ";
beta = beta.replace(/\s\s*$/, "");
// does not work, since alpha is a number and not a string
var alpha = 1;
alpha = alpha.replace(/\s\s*$/, "");
// does not work since gamma is undefined and not a string
gamma = gamma.replace(/\s\s*$/, "");

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