Uncaught TypeError: Cannot read property 'init' of undefined in Javascript while submitting form

Question

I'm trying to make a social networking mini web app using python web.py module. I made a registration form in html, but when I fill the details and submit them, the browser console shows the following output:

Uncaught TypeError: $(...).ready(...) is not a function
at scripty.js:22
loaded
jquery-3.4.1.min.js:2 Uncaught TypeError: Cannot read property 'init' of undefined
at HTMLDocument.<anonymous> (scripty.js:4)
at e (jquery-3.4.1.min.js:2)
at t (jquery-3.4.1.min.js:2)

I've searched for similar problems but their solutions doesn't seem to work for this case.

Here is my "scripty.js" file code

$(document).ready(function () {
    console.log("loaded");

    $.material.init();

    $(document).on("submit", "#register-form", function (e) {
        e.preventDefault();
        console.log("form submitted");

        let form = $('#register-form').serialize(); //get the form data

        //send an ajax request over to the route /postregisteration
        $.ajax({
            url: '/postregisteration',
            type: 'POST',
            data: form,
            success: function (response) {
                console.log(response);
            }
        });
    });
})();

And here is the controller.py file code in python

import web
from Models import RegisterModel


urls = (
    '/', 'Home',
    '/register', 'Register',
    '/postregistration', 'PostRegistration'
)

render =  web.template.render("Views/Templates", base="MainLayout")

app = web.application(urls, globals())


# Classes/Routes
# Each class will be controlling a route

class Home:
    def GET(self):
        return render.Home()

class Register:
    def GET(self):
        return render.Register()

class PostRegistration:
    def POST(self):
        data = web.input()
        print(data.username)

        reg_model = RegisterModel.RegisterModel.insert_user(data)
        return data.username


if __name__=="__main__":
    app.run()

After clicking submit, it just prints "loaded" and shows the error on browser console.

But it must also show "form submitted".

Any help would be appreciable.

Answer 1

Change the last line of the JS you've shown:

From

})();

to

});

That fixes your first error ... is not a function.

For the second error, that means $.material is undefined. Either remove it (if you're not using material design) or make sure the corresponding plugin is available.