#Pouchdb appjs how to

Any idea what might have caused this problem and how to solve it?

Meanwhile everything seems fine when I followed the official guide to make the todo Demo. I think the problem is still that the sources in the html failed to created this connection between pouchdb.js with my WebApp.

Var pouchdb = () īut it throws the same error associated with require. Var PouchDB = require('pouchdb-browser')

#Pouchdb appjs install

I also tried npm install pouchdb-browser and then in the js file I wrote: But when I attempted to do it this way, a new error occurred: 'ReferenceError: PouchDB is not defined'. In the PouchDB official guide, it doesn't even included this line var PouchDB = require('pouchdb') in its app.js, but directly says var db = new PouchDB('todos'). This demo worked perfectly on my laptop, but when it comes to my own WebApp it no longer works and still throws the same error.Īnother problem for this method is that even if the cdn link worked and I could reach, I still need the to be able to work since I want data in the JSON file to be saved to pouch. This is also the only source this PouchDB official guide uses in its todo demo.

Use in the html file instead of using pouchdb.js in the js folder as the source.

But in my js file it started to throw error from this line var PouchDB = require('pouchdb') stating 'Uncaught ReferenceError: require is not defined', which I think it means that my WebApp failed to reach pouchDB from the src. I cloned pouchDB to my working html folder so the path should be fine. In my index.html I imported these at first: The main module uses URL-friendly symbols ( A-Za-z0-9_-) and returns an ID with 21 characters (to have a collision probability similar to UUID v4).I want to use pouchDB in my WebApp so that when I click on a button, the data from a JSON file would be saved to pouchDB.

nanoid-good to be sure that your ID doesn't contain any obscene words.

nanoid-dictionary with popular alphabets to use with nanoid/generate.

ID size calculator to choice smaller ID size depends on your case.

Nano ID uses a better algorithm and is tested for uniformity. The spread will not be even there will be a lower chance for some symbols to appear compared to others-so it will reduce the number of tries when brute-forcing. Random % alphabet is a popular mistake to make when coding an ID generator. These modules use unpredictable hardware random generator. Instead of using the unsafe Math.random(), Nano ID uses the crypto module in Node.js and the Web Crypto API in browsers. See a good article about random generators theory: Secure random values (in Node.js) Unpredictability test /benchmark nanoid 693, 132 ops /sec nanoid /generate 624, 291 ops /sec uid.sync 487, 706 ops /sec uuid /v4 471, 299 ops /sec secure -random -string 448, 386 ops /sec shortid 66, 809 ops /sec Async: nanoid / async 105, 024 ops /sec nanoid / async /generate 106, 682 ops /sec secure -random -string 94, 217 ops /sec uid 92, 026 ops /sec Non -secure: nanoid /non -secure 2, 555, 814 ops /sec rndm 2, 413, 565 ops /sec Security

Because of memory allocation tricks, Nano ID is 16% faster than UUID.

#Pouchdb appjs code

Nano ID code is 3 times less than uuid/v4 package: 141 bytes instead of 435.

Nano ID uses a bigger alphabet, so a similar number of random bits are packed in just 21 symbols instead of 36.

There are three main differences between Nano ID and UUID v4: It has a similar number of random bits in the ID (126 in Nano ID and 122 in UUID), so it has a similar collision probability:įor there to be a one in a billion chance of duplication, 103 trillion version 4 IDs must be generated. Nano ID is quite comparable to UUID v4 (random-based). The generator supports Node.js, React Native, and all browsers.