How to hide default browser error messages?

Question

I would like it to appear on the console, only the message placed on the Reject and hide that default GET error from the browser.

    function loadScript(src) {
        return new Promise((resolve, reject) => {
            let script = document.createElement('script')
            script.src = src
            script.onload = resolve(script)
            script.onerror = reject(console.log(new Error('Ocorreu algum erro.')))
            document.head.append(script)
        })
    }
    loadScript('msf.js')

The mistake:

Error: Ocorreu algum erro.
    at promise_version.html:18
    at new Promise (<anonymous>)
    at loadScript (promise_version.html:14)
    at promise_version.html:23

GET file:///home/art/Art/promise_assync_await/msf.js net::ERR_FILE_NOT_FOUND
(anonymous) @ promise_version.html:19
loadScript @ promise_version.html:14
(anonymous) @ promise_version.html:23

Answer 1

The mistake net::ERR_FILE_NOT_FOUND is from the browser itself, it is not possible to treat it with Javascript.

It is set in Chromium/Chrome on net_error_list.h, on line 44:

// The file or directory cannot be found.
NET_ERROR(FILE_NOT_FOUND, -6)

References:

https://stackoverflow.com/questions/48127436/how-to-catch-chrome-error-neterr-file-not-found-in-xmlhttprequest/48182975.

https://stackoverflow.com/questions/7035466/check-if-file-exists-but-prevent-404-error-in-console-from-showing-up