Sergio Gutiérrez sg-gs

No todos los valores aleatorios se obtienen de la misma forma - para código relacionado con la seguridad, necesitas un tipo específico de valores aleatorios.

TL;DR

Resumen rápido, si te da pereza leerlo entero:

No uses Math.random(). Hay extremadamente muy pocos casos en los que Math.random() sea la mejor opción. No lo uses, a no ser que leas este artículo completamente, y hayas determinado que sirve para tu caso.
No uses crypto.getRandomBytes directamente. Aunque utiliza CSPRNG, es fácil sesgar el resultado cuando se transforma, haciendo que el resultado sea predecible.
Si quieres generar tokens al azar o API keys: Usa uuid, específicamente usa el método uuid.v4(). Evita node-uuid - no es la misma librería, y no produce valores aleatorios realmente seguros.
Si quieres generar números aleatorios dentro de un rango: Usa random-number-csprng.

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How to disable page caching with create-react-app

If you currently not using a service worker resulting in old production caches being used and users not getting new versions of the app.

src/index.js

Use:

import { unregister as unregisterServiceWorker } from './registerServiceWorker'

Whether you're trying to give back to the open source community or collaborating on your own projects, knowing how to properly fork and generate pull requests is essential. Unfortunately, it's quite easy to make mistakes or not know what you should do when you're initially learning the process. I know that I certainly had considerable initial trouble with it, and I found a lot of the information on GitHub and around the internet to be rather piecemeal and incomplete - part of the process described here, another there, common hangups in a different place, and so on.

In an attempt to coallate this information for myself and others, this short tutorial is what I've found to be fairly standard procedure for creating a fork, doing your work, issuing a pull request, and merging that pull request back into the original project.

Creating a Fork

Just head over to the GitHub page and click the "Fork" button. It's just that simple. Once you've done that, you can use your favorite git client to clone your repo or j

	[Settings]
	ID = "Your_Site_ID"

	# Settings in the [build] context are global and are applied to all contexts unless otherwise overridden by more specific contexts.

	[build]
	# This is the directory to change to before starting a build.
	base = "project/"
	# NOTE: This is where we will look for package.json/.nvmrc/etc, not root.
	# This is the directory that you are publishing from (relative to root of your repo)

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<title>Hash large File Example</title>

	<script src="https://cdnjs.cloudflare.com/ajax/libs/asmCrypto/0.22.0/asmcrypto.min.js"></script>
	<script type="text/javascript" language="javascript">
	function on_hash_done(hash, time_elapsed_seconds) {
	document.getElementById('progress').innerText = '';

	// Getting a file through XMLHttpRequest as an arraybuffer and creating a Blob
	var rhinoStorage = localStorage.getItem("rhino"),
	rhino = document.getElementById("rhino");
	if (rhinoStorage) {
	// Reuse existing Data URL from localStorage
	rhino.setAttribute("src", rhinoStorage);
	}
	else {
	// Create XHR, Blob and FileReader objects
	var xhr = new XMLHttpRequest(),