geonmo.nine DublinCity

iOS restrictions re: bringing up the keyboard on programmatic focus

I can't find exact specifications on this, but it seems that iOS restricts bringing up the keyboard via programmatically focusing on <input>. It only brings up the keyboard in response to explicit user interaction.

iOS focus on input field only brings up keyboard when called inside a click handler.
It doesn’t work if the focus is async.

This presents a curious problem when you want to autofocus an input inside a modal or lightbox, since what you generally do is click on a button to bring up the lightbox, and then focus on the input after the lightbox has been opened. Without anything fancy, it actually works ok. The problem shows up when you try to add something fancy like a setTimeout or a promise.then(). I don't know why people would want to use a setTimeout here, but waiting for a promise is actually a pretty common use case. E.g. we try to batch dom manipulations like getting a lightbox to show up inside `requestAnimati

Mobile Safari does not support position: fixed when an input focused and virtual keyboard displayed.

To force it work the same way as Mobile Chrome, you have to use position: absolute, height: 100% for the whole page or a container for your pseudo-fixed elements, intercept scroll, touchend, focus, and blur events.

The trick is to put the tapped input control to the bottom of screen before it activates focus. In that case iOS Safari always scrolls viewport predictably and window.innerHeight becomes exactly visible height.

Open https://avesus.github.io/docs/ios-keep-fixed-on-input-focus.html in Mobile Safari to see how it works.

Please avoid forms where you have several focusable elements because more tricks to fix position will be necessary, those were added just for demonstration purposes.

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

First, your HTTP server must return the correct HTTP Access Control rules

  Access-Control-Allow-Origin: "http://subdomain.domain.tld"
  Access-Control-Allow-Methods: "GET"
  Access-Control-Allow-Credentials: "true"
  Access-Control-Allow-Headers: "X-Requested-With"

During your AJAX request, set withCredentials to true

  $.ajax
    url: kodi.config.user_db

xhrFields: {'withCredentials': true}

	import { useReducer } from 'react'

	export function updateName(name: string) {
	return <const>{
	type: 'UPDATE_NAME',
	name
	}
	}

	export function addPoints(points: number) {

	#!/bin/bash
	if [ -f ~/Library/KeyBindings/DefaultkeyBinding.dict ]; then
	echo "~/Library/KeyBindings/DefaultkeyBinding.dict already exists"
	exit -1
	fi

	mkdir -p ~/Library/KeyBindings
	cat << EOF > ~/Library/KeyBindings/DefaultkeyBinding.dict
	{
	"₩" = ("insertText:", "\`");