You can't really inspect the source of most modern JS web apps without deobfuscation tools. Similar tools exist to disassemble WASM binaries and turn them into something readable.
Specifically for finding crypto miners, web requests will be an obvious sign of something fishy happening. You can see everything in the network inspector and if the binary uses some kind of additional encryption of requests, you should assume it's malicious.
Unfortunately mostly useless for professional applications.
It fails the most simple test from [0] in the online demo[1]. ImageMagic also has a page about this[2]. I.e. also try the 'city lights' test with the online demo to see it fail for the same reason.
The issue is that if you write code that deals with color you must understand color spaces and gamma. A non-linearly encoded color can't be plugged into any of the math you use to manipulate images and get meaningful results.
Almost all code I come across in the Rust ecosystem (or elsewhere no less) treats color as linear. But color incoming from image files that are not RAW, EXR or some TIF variant is almost /never/ linear.
The reason is that it is written by people who are (often very skilled) software developers but lack any basic understanding of color science.
And then it often takes convicing the maintainers first and subsequently yonx before it is fixed. I'm speaking from multiple experiences here.
For example, the fast image resize crate[3] addressed the resp. issue I filed last Dec.[4] less than a week ago. From the crate being released in the wild to it adding an option to treat color correct almost 1.5 years passed.
This is not the same as forcing crate users to treat color correct btw. The crate added a function that calls a closure but a user who do not understand color science may not grok why this is needed and not use it.
I guess I'm saying there is also often an 'UX' issue that perpetuates the problem to the user side of the API after the crate itself addressed it somehow.
That said, there are some very good crates that abstract the resp. parts away to address the issue. E.g. [5].
is the image resizing better than just doing it with canvas? i did resizing and cropping recently by rendering the image to canvas.. was only a dozen lines of code or so.