VS Code 환경설정
https://velog.io/@drv98/VS-code-%ED%99%98%EA%B2%BD%EC%84%A4%EC%A0%95
<body>
<h1>자바스크립트</h1>
<script src="app.js"></script>
</body>
// Log to console
console.log('Hello World');
console.log(123);
console.log(true);
var greeting = 'Hello';
console.log(greeting);
console.log([1,2,3,4]);
console.log({a:1, b:2});
console.table({a:1, b:2});
console.error('This is some error');
console.clear();
console.warn('This is a warning');
console.time('Hello');
console.log('Hello World');
console.log('Hello World');
console.log('Hello World');
console.log('Hello World');
console.log('Hello World');
console.log('Hello World');
console.timeEnd('Hello');
/*
multi
line
comments
*/