jQuery selector what's difference between jQuery(“element”) and $(“element”)?

Question

I used jQuery many times ago, but always used like this: $(document). Lately i seen many times somebody using jQuery(document), I don\'t know differenc

Answer 1

$ is just a short reference to the global jQuery object.

window.$ === window.jQuery // true

Most plugin authors make sure that the dollar sign really is referencing the jQuery object, by putting it into a self-invoking method.

(function( $ ) {
    // $(document)
}( jQuery ));

By invoking that anonymous method with the jQuery object as argument, we can access it within the method via $.