strong.js

function strong (obj, propertyName, type, initValue) {
	var propertyValue, 
	typeErrorMsg = "Property " + propertyName + " must be a " + type;

	if (initValue !== undefined && typeof initValue !== type) {
		throw new TypeError(typeErrorMsg);
	}

	propertyValue = initValue; 

	Object.defineProperty(obj, propertyName, {
		get: function () {
			return propertyValue;
		},
		set: function (newPropValue) {
			if (typeof newPropValue === type) {
				propertyValue = newPropValue; 
			} else {
				throw new TypeError(typeErrorMsg);
			}
		}
	});
}

That's my buddy putting the Java in JavaScript. Same guy that wears sunblock when he goes outside and brings earplugs to a concert. He is trying to make JavaScript as rigid as he is, people.

Jk, nice! 😄 😊

It's not true that I wear sunblock to go outside. I just don't go outside.