Skip Disliked Songs

[MiepHD]

Fixes #638

[ArjixWasTaken]

I highly suggest that you run that code through a code formatter, those one-liners are too long.
Also, there is no guarantee that the elements you are querying actually exist, please put some logic to handle that.

I can help you with that if you are not sure how to do it.
Last but not least, please add a stop() callback, this plugin should not require a restart in order to be fully disabled.

[MiepHD]

Also, there is no guarantee that the elements you are querying actually exist, please put some logic to handle that.

I'm not sure how I could handle that

[ArjixWasTaken]

I'm not sure how I could handle that

In some of my userscript's I've used a helper method to ensure my code runs at the correct time.

const waitForElem = (selector) => {
    return new Promise(resolve => {
        const interval = setInterval(() => {
            const elem = document.querySelector(selector);
            if (!elem) return;

            clearInterval(interval);
            resolve(elem);
        });
    });
}

and then

const likeBtn = await waitForElem('#like-button-renderer');

// ...
.observe(likeBtn, ...)

[MiepHD]

The button exists even if no song is selected and I think I can assume that the page is fully loaded at start(), right?

[ArjixWasTaken]

It ain't bad to be always careful, we don't want users experiencing unexpected bugs.

[JellyBrick]

Other than that, LGTM

[ArjixWasTaken]

LGTM as well