Chris McCormick chr15m

This gist lists challenges you run into when building offline-first applications based on IndexedDB, including open-source libraries like Firebase, pouchdb and AWS amplify (more).

Note that some of the following issues affect only Safari. Out of the major browsers, Chrome's IndexedDB implementation is the best.

Backing file on disk (WAL file) keeps growing (Safari)

When this bug occurs, every time you use the indexeddb, the WAL file grows. Garbage collection doesn't seem to be working, so after a while, you end up with gigabytes of data.

Random exceptions when working with a large number of indexeddb databases (Safari)

🖥️ See Demo

3.5 fps, Paperwhite 3
@adtac_

step 1: jailbreak your Kindle

mobileread.com is your best resource here, follow the instructions from the LanguageBreak thread

I didn't really follow the LanguageBreak instructions because I didn't care about most of the features + I was curious to do it myself, but the LanguageBreak github repo was invaluable for debugging

	// Made with Amplify Shader Editor
	// Available at the Unity Asset Store - http://u3d.as/y3X
	Shader "Unlit/Directional Tint"
	{
	Properties
	{
	_MainTex("MainTex", 2D) = "white" {}
	_Color("Color", Color) = (1,1,1,1)
	_ColorA("ColorA", Color) = (1,1,1,1)
	_ColorB("ColorB", Color) = (1,1,1,1)

	(ns com.nextjournal.tests.browser.runner
	(:require [clojure.string :as str]
	[clojure.test :as t :refer [test-vars]]
	[com.nextjournal.tests.browser.article-test-nbb :as article-test]))

	(defmethod t/report [:cljs.test/default :begin-test-var] [m]
	(println "===" (-> m :var meta :name))
	(println))

	(defn print-summary []

	(ns example
	(:require ["fs" :as fs]
	["web-audio-api$default" :as wa]))

	(def ^:dynamic context (wa/AudioContext.))
	(set! (.-outStream context) (.-stdout js/process))

	(fs/readFile "outfoxing.mp3"
	(fn [err buffer]
	(when err (throw err))

	CLANG_DIR = $(HOME)/clang+llvm-13.0.1-x86_64-linux-gnu-ubuntu-18.04
	CLANG = $(CLANG_DIR)/bin/clang
	LLC = $(CLANG_DIR)/bin/llc
	LD = $(CLANG_DIR)/bin/wasm-ld

	C_SRC := $(wildcard src/c/*.c)
	OBJ_SRC := $(patsubst %.c, %.o, $(C_SRC))

	%.o: %.c # delete competing implicit rule

	#!/usr/bin/env -S bash -c "docker run -p 8080:8080 -it --rm \$(docker build --progress plain -f \$0 . 2>&1 \| tee /dev/stderr \| grep -oP 'sha256:[0-9a-f]*')"

	# syntax = docker/dockerfile:1.4.0

	FROM node:20

	WORKDIR /root

	RUN npm install sqlite3