function consoleStyler(color, background, fontSize, txt) 
{ 
    var message = "%c" + txt;
    var style = `color: ${color}`; 
    style += `background:${background}`;
    style += `fontSize:${fontSize}`;
    console.log(style) 
} 

function celebrateStyler(reason)
 {
    var fontStyle = "color: tomato; font-size: 50px"; 
    if (reason == "birthday")  {  
        console.log('%cHappy Birthday', fontStyle) 
    }
    else if (reason == 'champions') {
        console.log('%cCongrats on the title!', fontstyle)
    }
    else { 
        console.log(message, style)
    }
 }

 consoleStyler('#1d5c63', '#ede6db', '40px', 'congrats!');
 celebrateStyler('birthday') 

function styleAndCelebrate() 
{
     consoleStyler(color, background, fontSize, txt);
     celebrateStyler(reason);
} 
styleAndCelebrate('#ef7c8e', '#fae8e0', '30px', 'You made it!', 'champions')

我收到一个消息未定义的错误。现在我知道var是函数作用域，所以它不能在函数之外使用。但是Coursera上的Assignment坚持