console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>fromEntries</title>
</head>
<body>
	<script type="text/javascript">
		function fromEntries(arr) {
			let obj = {};
			for (let i = 0; i < arr.length; i++) {
				let value = arr[i];
				obj[value[0]] = value[1];
			}
			return obj;
		}
		let arr = [["one", 1], ["two", 2]];
		console.log(fromEntries(arr));
	</script>
</body>
</html>