invalidURL is not invalid
invalidURL is not invalid

in OpenProcessing.org at least, the 'https://invalidURL' does not return as invalid, whereas a truly bad URL : 'ttps://invalidURL'  does.
dhowe/p5.js,dhowe/p5.js,mlarghydracept/p5.js,mlarghydracept/p5.js,limzykenneth/p5.js,processing/p5.js,limzykenneth/p5.js,processing/p5.js