I am trying to code a website, when a Erorr occur because I write
button.classList.add('btn btn-sm btn-outline-primary'); which is wrong cause there is spaces in the added value, so I tried to remove the line to test the code, but when I removed it the same erorr occured, so I make sure that I’ve changed the code but the erorr keep occurring so I chicked the source code in google’s dev-tools, and I see that the code haven’t changed at all even after removing the line, this is my only js file

In Firefox, you can use mozInnerScreenX and mozInnerScreenY properties to get the screen coordinates of the upper-left corner of the current viewport. This also works for code that is executing in the context of an iframe, in that it will return the screen coordinates of the upper-left corner of the iframe’s visible area on screen.

I want to create some blobs from sources like SVG or binary data and use them in the DOM. However, I have noticed that I cannot release them properly. I have created a code snippet below.

I use onBeforeSendHeaders to intercept requests, and I define cookies for different users. In the method, I iterate through them to replace the original request’s cookies, then use the sendRequest method to resend the modified request.

I got this error when trying to run this code

im trying to refresh a url that is opened until it is canceled by the user manually

I wanted to open a local app, so I used location.href = ‘xxx://’, but in different environments, the Google browser shows different alerts, one of these alerts has a checkbox for asking users if they want to always open this app, but another one doesn’t have this checkbox.

I have an extension that has added a button to a page. How to make sure that after clicking the button, a file is downloaded from the site/extension folders, the image is allowed in the extension extension, and when you click the download button, it goes in the browser

I want to disable submitting form twice. Users often double click on submit button and then form is submitted twice. I already tried following Javascript, but does not work: