Logging¶
Free static function¶
A free static function is one that can be provided as a call back and it will be run fine:
Firefox v122 console session
function run(cb) {
return cb();
}
run(Math.random);
//=> 0.20621770135266349
run(crypto.randomUUID);
// ~ Uncaught TypeError: 'randomUUID' called on an object that
// ~ does not implement interface Crypto.
Once, log was not a free static method of console, which means this didn’t work:
var log = console.log;
log('hello');
// ~ Illegal invocation (back in the day)
But we could use something like Function.prototype.bind:
var log = console.log.bind(console);
log('hello');
//=> hello
Nowadays we can simply do const log = console.log and it works on most, if not all JavaScript engines.
It works with console.info/error/table/etc. as well.