Question

172

rated 0 times [ 176] [ 4] / answers: 1 / hits: 31138 / 9 Years ago, tue, july 21, 2015, 12:00:00

Is it possible to test a variable to see if it is a primitive?

I have seen lots of questions about testing an variable to see if it is an object, but not testing for a primitive.

This question is academic, I don't actually need to perform this test from my own code. I'm just trying to get a deeper understanding of JavaScript.

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1 Year ago

answered 9 Years ago jarod · Accepted Answer

To test for any primitive:

function isPrimitive(test) {

    return test !== Object(test);

}

Example:

isPrimitive(100); // true

isPrimitive(new Number(100)); // false