Do I need to put a dollar before variable names with javascript?

Question

I have the following code:

var formSubmitHandler = function (link, form) {

    //e.preventDefault();
    var $form = form;
    var val = $form.valid();
             


        

Answer 1

$ and jQuery are basically the jQuery instance.

It's good to understand that $( < place something here >) is a jQuery function call and $your_variable_name is just a variable with a dollar.

Some people use $ in their own variables to indicate that it is a jQuery object. With this naming convention, your source code would like this.

var formSubmitHandler = function (link, form) {
    var $form = $(form);
    var val = $form.valid();
    var action = $form.data('action');
    var entity = $form.data('entity');