gistfile1.txt

$('document').ready(function(){
    console.log('before')
    document.querySelectorAll('pre.console-output span').forEach(span => {
        if (span.textContent.includes('[info]')) {
            span.style.color='cyan'
        }
        if (span.textContent.includes('[error]')) {
            span.style.color='red'
        }
    });
    console.log('after')
});