Can a variable be tested to determine if it is a primitive data type?
I've come across many inquiries about testing a variable to check if it is an object, but not specifically for a primitive type.
This inquiry is purely academic, as I do not require this test in my own code. I simply want to enhance my knowledge of JavaScript.
To check for whether a value is a primitive:
function isPrimitive(input) {
return input !== Object(input);
}
For example:
isPrimitive(100); // true
isPrimitive(new Number(100)); // false
Object takes a parameter and determines if it is an object, returning true if it is, or returning an object if it is not.
Afterwards, a strict equality comparison can be used to compare types and values.
If the value is an object, Object(value) will be identical to the original object, making value === Object(value) true. If the value is not an object, value !== Object(value) because they will have different data types.
Therefore, you can employ
Object(value) !== value
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