Skip opening devtools when programming mithril

mithril_onerror.js

/*
error method makes it so i don't have to open up dev tools to see what went wrong.
must be in different <script> from your app code.
I use it in combination with Auto Reload https://addons.mozilla.org/en-US/firefox/addon/auto-reload/?src=api
*/
window.onerror = function(msg, url, line, col, error) {
	m.render(document,
		m("html", [
			m("body", [
				m("table", [
					m("tr", [
						m("td", "url"),
						m("td", url)
					]),
					m("tr", [
						m("td", "Message"),
						m("td", msg)
					]),
					m("tr", [
						m("td", "Line number"),
						m("td", line)
					]),
					m("tr", [
						m("td", "Column"),
						m("td", col)
					]),
					m("tr", [
						m("td", "Error"),
						m("td", error)
					])
				])
			])
		])
	);
};