Waterdog | Yesdog fork of Waterfall/BungeeCord that adds Bedrock | Plugin library
kandi X-RAY | Waterdog Summary
kandi X-RAY | Waterdog Summary
Waterdog, a Yesdog fork of Waterfall/BungeeCord that adds Bedrock support.
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QUESTION
Hi i am new in web development, i am trying to hit an random image url generator API and trying to show image on screen. i am getting the response from API but while passing the url to img variable i am getting TypeError: Cannot read property 'src' of null at XMLHttpRequest.xhr.onreadystatechange
...ANSWER
Answered 2020-Aug-30 at 15:47You executed var img = document.querySelector("#photo");
before the image existed in the HTML. (It is defined below your JS code.
Moving the declarations of btn
and img
inside function c() { ... }
will fix your issue, because all the HTML elements will exist.
QUESTION
So, I made a basic onclick toggle page. I wrote code that works, but when I try to refactor it, it does not work. Can someone point out why and how to fix it?
I tried the refactored JS for just one image--why try it for all images when the first one won't work.
I will attach the HTML, the working JS and refactored JS. I wont include ALL the JS from the file that works. I will provide the code that toggles the first image (that I reused to toggle the next five images).
...ANSWER
Answered 2019-Jun-07 at 11:57This happens because one of the parameters of the function dogClicker() and a global variable have the same name - image_tracker. Better make your function's parameter variables unique or alter the global variable directly without passing it to the function at all.
Also if you add the click event listener like this:
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