Question

here is my code for a custom jquery plugin :

(function($){
    $.fn.extend({
        getmyValue : function(){
        return this.each(function() {
                return this.myVal;
        });
        },
        initPlugin : function(){
        return this.each(function() {
                this.myVal='Some results';
        });
        }
    });
})(jQuery);

when i run this code :

$(document).ready(function() {

$("#div").initPlugin();
alert($("#div").getmyValue());
});

the returned value is not a plain string as supposed but an object ( $(“#div”) is returned )

what i can’t figure out is why the return chaining is not working ?

Answer 1

Because the return value of each is the object on which you called each. The return value of the function each calls is used to determine whether to stop looping (that is, the iteration function can return false to stop looping — docs link).

It’s unclear from your code what you really want to do in getmyValue; return a value you’ve stored on the jQuery instance itself? Return the myVal stored on the first contained element? Return an array of the myVal values from all the contained elements?

If you meant a myVal stored on the jQuery instance by your plugin:

getmyValue : function(){
    // Here, `this` is the jQuery instance on which `getmyvalue` was called
    return this.myVal;
},

If you meant the myVal on the first element (note that it’s a raw DOM element in the typical case):

getmyValue : function(){
    // Here, `this` is the jQuery instance on which `getmyvalue` was called.
    // `this[0]` is the first matched element (a raw DOM element, typically).
    // Note we check before accessing it to see if it's there, since a jQuery
    // instance may have matched zero elements.
    return this[0] ? this[0].myVal : undefined;
},

If you meant an array of the myVal values from all the matched elements (again, these will be raw DOM elements in the typical case):

getmyValue : function(){
    // Here, `this` is the jQuery instance on which `getmyvalue` was called.
    return this.map(function() {
            // Here, though, `this` one of the elements wrapped by the jQuery,
            // instance typically a raw DOM element. (Each of them in a loop.)
            return this.myVal;
    }).get();
},

…which uses map to get a jQuery-wrapped array of the values, and then get to get the raw array from it.