I want to use WebAudio(AudioContext) in NodeJS. However NodeJS does not support WebAudio. There is an npm for web-audio-api but it is still in alpha stage and is incomplete.
So how can I use WebAudio(AudioContext) in NodeJS.
Can I instantiate a chrome browser environment from NodeJS and utilize its capabilties. Is this possible?
Is there any other way to do it?
Please help.
You can use node-webkit or app.js to use WebAudio API and talk with it with socket.io.
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This may be a dumb question, but is the default react app (created using npm create-react-app my-app) using node.js? I am confused because in my web development class at university, I had to download node.js to create react applications. However, I didn't have to do anything like creating a server or initiating a node.js file, which is described in w3school's node.js tutorial. Because of this, I found out that I don't even really know what node is used for, besides downloading packages like redux and whatnot.
create-react-app uses node.js for all of its dev tooling. Likewise, a lot of the tools you'll use in the React ecosystem (like webpack, prettier, npm), all run on top of node.js as well).
You'll most probably build your react app to a static file, in which case the production output will not require node.js, it will be html and javascript assets that can be served directly to a client.
Hope that helps! Let me know if you have other specific questions
Node.js is used for server-side while React.js is for the front-end part. So, no, you don't need Node.js.
Under development mode, yes. Create react app runs NodeJs with Webpack Dev Server to allow you get feedback when modifing files, start or stop the server.
I am a Beginner to Angular technology and came across this question.
why is Node js needed in Angular as Node js is a backend technology?
You need NodeJs for angular if you intend to create a front end server, use typescript or make anything other than a purely in browser application(unless you use another server framework: Apache, nginx, lighttp, ruby/rails etc.). For example Vanilla javascript does not support require or import functionality so you need node to load file dependencies, and angularjs does not allow for server creation on its own. You can also choose to build angular applications in TypeScript which utilises NodeJs.
It is worth noting that technically speaking nodejs and angularjs are separate frameworks, angular can be run without node but would only support limited functionality(no db access, no server etc).
The CLI is needed in order to run angular commands through the command line, to generate services / components etc.
You can read more about angular here
Angular does not need Node. However to make the dependencies management easier especially in package.json , npm which is a package manager is required. And in order to get npm, you need to install Node first.
As for angular cli, it provides a terminal that makes it easy to execute operations like creation of an angular app, angular components, building...
Is that possible to use NodeJs server-side codes in react native,ionic,cordova or native script for mobile applications?
Question update:
I want to use NodeJs package and include NodeJs package into mobile application (native script , ionic , cordova or react native). for example include instagram-private-api into native script : NodeJs Private instagram API
{N} !== Browser / NodeJS.
It's a pure JS runtime, any apis specific to these platforms won't work within {N}. Though nativescript-nodeify plugin on-boards very limited NodeJS apis by translating them to their native equivalents.
I've been using many node.js APIs (including google/baidu/bing/wikipedia) inside my cordova App, here's what I did:
Install node.js / express / socket.io in your linux server.
Use socket.io inside your Cordova app to create 'many clients to one server' connections between your app and the node.js/socket.io server. In https://socket.io there is a simple example teaching you how to do that.
In Cordova App, use something like socket.emit('FromClientToServerCallAPI', data) to call an api.
In node.js server, define a function:
socket.on('FromClientToServerCallAPI', data)
and inside this function, call your api, and after you got the result from the api provider, run:
socket.emit('FromServerToClientAPIResult', result)
In your Cordova App, define a function:
socket.on('FromServerToClientAPIResult', result)
then do somthing with 'result'
pls. note that all the functions above are async.
Never try to call the api directly in your client codes, Some api provider requires you to apply for the api service and give you a 'key' to use the api, you don't want to put this 'key' inside your javacript and disclose it to all your users of the App, right?
Yes, it is possible with nodejs-mobile. It lets you run a full-blown Node.js engine inside a mobile application. It works on Android and iOS. There are other solutions that work on Android but as far as I know nodejs-mobile is currently the only one that also supports iOS. It also comes with plugins for React Native and Cordova.
More information, including documentation, is available on the project website.
(Full disclosure: I work for the company that develops nodejs-mobile.)
What is the difference between nodejs and expressjs and
Is it possible to create webpage only using nodejs?
Node.js is an open-source, cross-platform JavaScript run-time environment for executing JavaScript code server-side. Node allows you to write and run Javascript code server-side.
Express.js is a framework for Node.js. Basically instead of writing 20 lines of code for a simple functionality with Node.js, you can write it in 2 lines using Express.js.
You can write the webapp using Node.js, but I don`t recommend it. Express is a minimalistic framework and it will make you life easier.
Node.js is an open-source, cross-platform JavaScript run-time environment for executing JavaScript code server-side. Node allows you to write and run Javascript code server-side.
Express.js is a framework for Node.js
Express is built on top of Node, so yes Express adds more features. Node is just a Javascript environment with libraries to make it easy to write software, where Express extends Node specifically to make webservers easy to write.
Express/Connect adds the concept of middleware, a simplified way of managing different routes, automated integration with several templating engines and a bunch more.
All nodejs framework in here
Help it help you.
Thanks.
I'm trying to develop an application in phonegap/ionic and I want to use a remote database to store my data. I want to use MongoDB.
I already tried lots of ways such as this quick start guide.
By using this I can connect to DB but this is pure node.js and the require() function cannot be recognized when I try to add this code to an ionic starter app. Maybe require is not supported in ionic
Is there a way that can achieve it in Ionic?
Please let me know if you want some more information.
The thing is; you can't connect Ionic to MongoDB directly. No, there's not workaround, no magic involved, it's just not the way this is supposed to work. Ionic works on top of Angular and Angular is a frontend framework.
However, the way you should do it is that you basically create a (RESTful) API on your server side.
Most likely this will be made with Node.js which will talk directly to MongoDB and query it. A framework very well suited for this (you actually may be using it already) is Express.
After you write your (RESTful) API then you can consume it through your services in Angular by using Angular's $resource object.
Sure, this is not a step by step answer, and it seems you're just starting in this area, so you have some learning do to on your part (REST, RESTful, $resource, services...), but I wish you good luck and if you'll have any more specific questions, don't hesitate to ask them.