Question

I’m coming back to “raw” Javascript, and I’m writing classes like this:

var Person;

Person = (function() {

    function Person() {}

    Person.prototype.run = function() {};

    Person.prototype.jump = function() {};

    Person.prototype.talk = function() {};

    return Person;

})();

I feel like the repetition of Person.prototype isn’t very DRY: it’s also harder to avoid line wrapping. Are there common ways of addressing this? For example, one could assign Person.prototype to a small variable like cls, which would make the lines look more like

cls.run = function() {};

…but that might be too unconventional.

Answer 1

Since you do not have anything in the prototype you can simply assign a new object to it:

Person.prototype = {
    run: function() {},
    jump: function() {},
    walk: function() {}
};

Otherwise you could use a function such as jQuery’s $.extend() to merge two objects:

$.extend(Person.prototype, {
    run: function() {},
    jump: function() {},
    walk: function() {}
});