shreshthmohan/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Undeclared?</title>
</head>
<body>

<script id="jsbin-javascript">
console.log('f = 15;');
f = 15;


console.log(f);
console.log('shouldn\'t this have returned some error?');
console.log('Looks like it\'s equivalent to writing:');
console.log('this.f = 15;');
console.log('Since \'this\' is created in the global execution context by JS engine on its own, it\'s valid JS. Makes sense?');

console.log('function test() {\n  g = 14;\n}; \ntest();\nconsole.log(g);');
function test() {
  g = 14;
}

test();
console.log(g);

console.log('The above works too. Why you ask? Again because when the syntax parser doesn\'t see a var/const/let before a variable it defaults to global scope.')
</script>


<script id="jsbin-source-javascript" type="text/javascript">console.log('f = 15;');
f = 15;


console.log(f);
console.log('shouldn\'t this have returned some error?');
console.log('Looks like it\'s equivalent to writing:');
console.log('this.f = 15;');
console.log('Since \'this\' is created in the global execution context by JS engine on its own, it\'s valid JS. Makes sense?');

console.log('function test() {\n  g = 14;\n}; \ntest();\nconsole.log(g);');
function test() {
  g = 14;
}

test();
console.log(g);

console.log('The above works too. Why you ask? Again because when the syntax parser doesn\'t see a var/const/let before a variable it defaults to global scope.')                      </script></body>
</html>

## jsbin.qeyebah.js
console.log('f = 15;');
f = 15;


console.log(f);
console.log('shouldn\'t this have returned some error?');
console.log('Looks like it\'s equivalent to writing:');
console.log('this.f = 15;');
console.log('Since \'this\' is created in the global execution context by JS engine on its own, it\'s valid JS. Makes sense?');

console.log('function test() {\n  g = 14;\n}; \ntest();\nconsole.log(g);');
function test() {
  g = 14;
}

test();
console.log(g);

console.log('The above works too. Why you ask? Again because when the syntax parser doesn\'t see a var/const/let before a variable it defaults to global scope.')
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>Undeclared?</title>
	</head>
	<body>

	<script id="jsbin-javascript">
	console.log('f = 15;');
	f = 15;



	console.log(f);
	console.log('shouldn\'t this have returned some error?');
	console.log('Looks like it\'s equivalent to writing:');
	console.log('this.f = 15;');
	console.log('Since \'this\' is created in the global execution context by JS engine on its own, it\'s valid JS. Makes sense?');

	console.log('function test() {\n g = 14;\n}; \ntest();\nconsole.log(g);');
	function test() {
	g = 14;
	}

	test();
	console.log(g);

	console.log('The above works too. Why you ask? Again because when the syntax parser doesn\'t see a var/const/let before a variable it defaults to global scope.')
	</script>



	<script id="jsbin-source-javascript" type="text/javascript">console.log('f = 15;');
	f = 15;



	console.log(f);
	console.log('shouldn\'t this have returned some error?');
	console.log('Looks like it\'s equivalent to writing:');
	console.log('this.f = 15;');
	console.log('Since \'this\' is created in the global execution context by JS engine on its own, it\'s valid JS. Makes sense?');

	console.log('function test() {\n g = 14;\n}; \ntest();\nconsole.log(g);');
	function test() {
	g = 14;
	}

	test();
	console.log(g);

	console.log('The above works too. Why you ask? Again because when the syntax parser doesn\'t see a var/const/let before a variable it defaults to global scope.') </script></body>
	</html>