Can it be used for a difficult task? Yes. As long as you have a basic understanding of HTML and CSS, you should be able to do most things, especially if you are familiar with the framework, as it uses this language to make most of its coding tasks possible.
What about different browsers? What about different browsers? In order to use the library you must have the latest version of the browser. If you have a different version, you won’t be able to use the library.
Can I just download the latest version of jQuery? Absolutely! But, the Internet Explorer version is the only version that will work with the latest versions of your browser. So, if you use IE and you want to use jQuery, it’s best to download the latest version.