未捕获的TypeError：无法调用null的方法“ show”

Question

I am getting an :Uncaught TypeError: Cannot call method 'show' of null" error in a script which points out the error is somewhere in this area, see below:

            // Show the correct more view images and if there are moreviews displayed, display the more views title
            if (selectedmoreview !== null && selectedmoreview !== undefined && howMany > 0) {
                selectedmoreviewtitle.show();
                selectedmoreview.invoke('show');
            } else {
                if(howMany > 0){ selectedmoreviewtitle.hide(); }
            }

            spConfig.configureElement(dropdownEl);

Can anyone help me sort this out and have my functionality working? Some expert advice would be truly appreciated

Answer 1

Per request:

As far as I can see (and I only looked quickly) you are trying this line of code:

selectedmoreviewtitle = $('moreviews-title'); 

in the colorselected.js on row 204. And there's no element with id or class named 'moreviews-title'. So that's why it gets null.

Further more, you'd probably want to use class selector '.moreviews-title' or id selector '#moreviews-title' .

Answer 2

You check selectedmoreview , but you try to call selectedmoreview .show() . Since selectedmoreview isn't null selectedmoreviewtitle probably is.