htmlValidator: @cassidoo's 2020-10-19 newsletter interview question

htmlvalidator.sh

#!/bin/bash

function htmlValidator () 
{ 
    if xmllint --noout --nowarning - 2> /dev/null <<< "$1"; then
        echo "valid";
    else
        echo "not valid";
    fi
}

# htmlValidator '<tag>I love coding <Component />!</tag>'
# => valid
# htmlValidator '<tag>I love coding <Component />!</ta'
# => not valid
# note: xmllint is included in macOS since at least 10.7.5, probably earlier
# source this file to add the function, e.g.
#  source htmlvalidator.sh