Alexander Foremny aforemny

I hereby claim:

To claim this, I am signing this object:

	% time curl -w '%{time_total}' google.com
	<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
	<TITLE>301 Moved</TITLE></HEAD><BODY>
	<H1>301 Moved</H1>
	The document has moved
	<A HREF="http://www.google.com/">here</A>.
	</BODY></HTML>
	46445
	real 0m0.055s
	user 0m0.007s

	% curl https://hydra.nixos.org/build/135077409/reproduce \| bash
	% Total % Received % Xferd Average Speed Time Time Time Current
	Dload Upload Total Spent Left Speed
	100 4080 100 4080 0 0 22793 0 --:--:-- --:--:-- --:--:-- 22921
	storing inputs and results in /tmp/build-135077409...
	running nix-build...
	using these flags: --arg nixpkgs { outPath = /tmp/build-135077409/nixpkgs/source; rev = "956afcd713a4f94a4acb4460d339dc638bac3d0a"; shortRev = "956afcd"; revCount = 263447; } -I nixpkgs=/tmp/build-135077409/nixpkgs/source --arg stableBranch false --option extra-binary-caches https://hydra.nixos.org/ --option system x86_64-linux /tmp/build-135077409/nixpkgs/source/nixos/release-combined.nix -A
	warning: ignoring untrusted substituter 'https://hydra.nixos.org/'
	/nix/store/3mjbw9fw21m5pidhh4nrsi904xvqy7n6-nixos-21.03pre263447.956afcd

	aforemny 1 day ago
	Hi!, I am wondering about a HTML thing: if I create a <form> that contains an <input type="text"> and I read that input's pattern property, I get back the empty string. The input does not have validation associated to it: if I type the letter "a", the input does not become invalid. However, if I set that input's pattern property to the empty string, then the input has validation associated to it. If I then type the letter "a", that input becomes invalid (because "a" does not match the empty string pattern).
	Here is an example of what I am observing: https://jsfiddle.net/Lcur56ne/ . To reproduce, type "a" in the input (it does not become invalid), then press the button (the input becomes invalid). The console shows that input's pattern attribute type and value prior to setting it to the empty string.
	How can I make sense of that? In particular, how can I differentiate whether that input's pattern property is set to the empty string or undefined as in has not been set yet?

	jsfiddle.net
	Ed

	trace: Using plugins: ["/nix/store/3jvdd81nv8a8hirhs7avnxnq6vbbcbm3-nixops-aws-1.7pre0_abcdef"]
	these derivations will be built:
	/nix/store/a3hmiiv1q7g7kkvqqn5r6lq7id933z0j-nixops-1.8pre0_abcdef.drv
	building '/nix/store/a3hmiiv1q7g7kkvqqn5r6lq7id933z0j-nixops-1.8pre0_abcdef.drv'...
	Sourcing python-catch-conflicts-hook.sh
	Sourcing python-remove-bin-bytecode-hook.sh
	Sourcing setuptools-build-hook
	Using setuptoolsBuildPhase
	Sourcing pip-install-hook
	Using pipInstallPhase

	<?php
	declare(strict_types=1);

	namespace Company\Extension\Controller\Ajax;

	use Psr\Http\Message\ResponseInterface;
	use Psr\Http\Message\ServerRequestInterface;
	use TYPO3\CMS\Core\Utility\GeneralUtility;
	use TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface;
	use TYPO3\CMS\Extbase\Object\ObjectManager;

	[
	{
	"name": "Material.Toolbar",
	"comment": "\nA toolbar is a container for multiple rows that contain items such as the\napplication's title, navigation menu and tabs, among other things.\n\nBy default a toolbar scrolls with the view. You can change this using the\n`fixed` or `waterfall` properties. A `flexible` toolbar changes its height when\nthe view is scrolled.\n\n\n# Resources\n\n- [Material Design guidelines: Toolbars](https://material.io/guidelines/components/toolbars.html)\n- [Demo](https://aforemny.github.io/elm-mdc/#toolbar)\n\n\n# Example\n\n```elm\nimport Html exposing (text)\nimport Material.Toolbar as Toolbar\n\n\nToolbar.view Mdc [0] model.mdc []\n [ Toolbar.row []\n [ Toolbar.section\n [ Toolbar.alignStart\n ]\n [ Toolbar.menuIcon [] \"menu\"\n , Toolbar.title [] [ text \"Title\" ]\n ]\n , Toolbar.section\n [ Toolbar.alignEnd\n ]\n [ Toolbar.ic

	effect module Window where { subscription = MySub } exposing
	( onScroll
	)

	import Dom.LowLevel as Dom
	import Json.Decode as Json
	import Process
	import Task exposing (Task)

	-- page.html

	<DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
	<link rel="stylesheet" href="https://code.getmdl.io/1.1.3/material.indigo-pink.min.css">
	<link rel="stylesheet" href="https://opensource.keycdn.com/fontawesome/4.6.3/font-awesome.min.css">
	<script src="elm.js"></script>