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Errors when try to use pdf2json with typescript

when i try to import pdf2json (3.0.1) in my node project (typescript) iam getting this error
Could not find a declaration file for module 'pdf2json'
Also i try to install #types/pdf2json for typescript and there is not available.
How i can solve this
install #types/pdf2json for typescript and there is not available.

Looks like you're right that there are currently no types available, but that's a work in progress and they may exist soon: https://github.com/modesty/pdf2json/pull/278

How to use node Buffer module in a client side browser - detailed explanation required please

First things first. I know that there are other questions that are similar to this e.g. use NodeJs Buffer class from client side or
How can I use node.js buffer library in client side javascript
However, I don't understand how to make use of the reference to use browserify though it is given approval.
Here is my Node code:
import { Buffer } from 'buffer/';
I know this is the ES6 equivalent of require.
I would like a javaScript file implementation of this module so that I can simply use the standard html file reference:
<script src=./js/buffer.js></script>
And then use it as in for example
return new Buffer(temp).toString('utf-8');
This simply falls over with the
Uncaught ReferenceError: Buffer is not defined
no matter how I create the buffer.js file.
So using the browserify idea I've tried using the standalone script (from the https://www.npmjs.com/package/buffer as https://bundle.run/buffer#6.0.3 )
I've created a test.js file and put
var Buffer = require('buffer/').Buffer
in it and then run browserify on it as
browserify test.js -o buffer.js
and many other variations.
I'm not getting anywhere. I know I must be doing something silly that reflects my ignorance. Maybe you can help educate me please.

These instructions worked for me. Cheers!
Here are the instructions you can look at the web section.
https://github.com/feross/buffer
Here is what the instructions state about using it in the browser without browserify. So from what you tried
browserify test.js -o buffer.js
I would just use the version directly that does not require browserify
To use this module directly (without browserify), install it:
npm install buffer
To depend on this module explicitly (without browserify), require it like this:
var Buffer = require('buffer/').Buffer // note: the trailing slash is important!

Node require mongo error - 'require is not defined'

I'm having a problem with mongo and node. I have a file called db.js where I put the require('mongodb') and if I import it to my index.html, I got the error:
require is not defined
But if I go to the db.js file and use 'node db', it works. I've tried import, require, src but still nothing works. Someone could help me?
<script type="text/javascript">
import 'js/db.js';
const MongoClient = require('mongodb');

Is there a reason that you need to configure mongodb on the front end? Unless you have a really good reason, I would strongly recommend against that. You basically throw any notion of security right out the window by doing that.
Now that we've got that cleared up, I think what you really are asking, is how you can let users make requests to mongodb from the front end. For that, you should use fetch or an HTTP request/response library like Axios in your front end javascript. Use either of these to send requests to your node backend and then you can interact with mongodb by passing along the user-submitted data from there.
Let me know if that helps you at all or if you need more help.

You should require mongodb statement on server side code not on the browser side.Browser don't understand the require/import statement.
You can try using module like browserify to see such functionality if it works.
http://browserify.org/

Make UploadFS work with angular2-meteor

I happen to need a file storage database and UploadFS seems to be the best option. My project is in Angular2 typescript and Meteor.
meteor add jalik:ufs-gridfs
So far it fails when I try to import the library like this:
import {UploadFS} from 'meteor/jalik:ufs'
The error thrown sais it couldn't find the library (on the client side).
I thought it may be because the library is in javascript while the rest of the project in typescript so I tried to write a stub ufs.d.ts, first handcrafted, then with dstmake, and then by hand again when I found I had to export the module UploadFS so that meteor (barbatus:typescript?) could see it:
declare module 'meteor/jalik:ufs' {
export module UploadFS{
interface UploadFS {
...
}
}
}
So far I had my ufs.d.ts stub file at the typings/ folder and linked in the main.d.ts. No errors at compile time. Meteor sad the DB was correctly created ... but then when I tried to use it broke.
I found that UploadFS was undefined so I supposed it wasn't referencing the library even though Meteor compiled without any error.
So I suppose the only thing I've have left is to translate jalik:ufs and jalik:ufs-gridfs to typescript by hand. Is that correct? Is there an easier way of making ufs work wit angular2-meteor?
Would you use some other storage solution? any advice either fixing this library or choosing another one?

I'm successfully importing that library and just suppressing the warnings with this line:
import 'meteor/jalik:ufs'; declare let UploadFS:any;
Keep an eye on https://github.com/meteor-typings and https://github.com/Urigo/angular2-meteor/issues/102 for proper type definitions in the future.
You should never have to re-implement a JavaScript library in TypeScript in order to use it.

import { UploadFS } from 'meteor/jalik:ufs';
console.log('UploadFS', UploadFS);
This gives me the UploadFS object and I think it's totally independent of angular2-meteor so I suppose that jalik:ufs should be working fine, even with those warnings generated by ts compiler.
About typings, those warning are very annoying, I know :) but you can pretend for now you don't see them.
Here's an example implementation of jalik:ufs I made for Angular1, but it will look pretty much the same with Angular2.
http://www.angular-meteor.com/tutorials/socially/angular1/handling-files-with-collectionfs

Why do dependency problems cause javascript code not to run properly when within a Meteor project?

I have been trying to port HTML5 with js code into Meteor. I'm having Javascript dependency problems.
The code can be found at: https://github.com/cwilso/Audio-Input-Effects
I created a new basically empty meteor project (which runs fine) and then added all of the js files from the repo above (which also runs fine on its own).
In order to make sure that the load order was correct, I renamed all the js files using numeric prefixes so that they would definitely be in the same order that they are loaded in the github repo. Looking forward to Meteor coming up with a better solution to this particular issue. I made a local copy of one js file that was otherwise loaded from a url in the repo.
In order to try to initialize the js I also added a file hello.js:
if (Meteor.isClient) {
Meteor.startup(function () {
// code to run on server at startup
initAudio;
});
}
When meteor runs and I look in the console, I get the following errors:
Uncaught TypeError: o3djs.provide is not a function (120_shader.js)
Uncaught ReferenceError: initAudio is not defined (hello.js)
Uncaught ReferenceError: Matrix4x4 is not defined (110_visualizer.js)
Thank you for your help.

I was able to resolve this issue by putting all of the js source files into a single js file in the correct order.

Anybody still wanting information regarding meteor load order, Scotch.io wrote an update to the official docs which clears it up somewhat.
https://github.com/meteor/meteor/commit/a5bdf481dfece9ebc57107d71be478f9b48cbd1e