Do CTRL+J to get JS console.  Or CTRL+I or F12.

console.log("x');
console.LEVEL("x');
Where LEVEL displayes in Chrome JS console with this color:
    debug  Blue
    info   Black  == log?
    warn   Black
    error  Red  + gives nice collaped stack trace
    N.b. has neither fatal nor severe.  Unlike all Java logging frameworks.

To copy something from console to system clipboard use:  copy(thing)