Example 5-11. Sample call stack

function echo(text) {
	console.log(text);
	throw Error('oops');
	// Example of call stack for error when triggered by a mouse click:
	// echo (line:3)
	// showRandomNumber (line:12)
	// handleClick (line:16)
}

function showRandomNumber() {
	echo(Math.random());
}

document.addEventListener('click', function handleClick() {
	showRandomNumber();
});

document.addEventListener('keypress', function handleKeypress() {
	showRandomNumber();
});