What I need:
Read a local JSON file inside NuxtJS as the page loads. So I can parse it into a prop within <option> tag.
What I have:
Lowdb (installed as dependency — to read the JSON file) inside a component, with this code:
computed: {
resultFetchCamera: function() {
const low = require('lowdb')
const FileSync = require('lowdb/adapters/FileSync')
const adapter = new FileSync('db.json');
const db = low(adapter);
let value = db.get('Size').map('Name').value();
return value;
}
}
}
I got an error This dependency was not found: * fs in ./node_modules/lowdb/adapters/FileSync.js. Fixed with this solution. Which leads me to another error: TypeError: fs.existsSync is not a function. This solution helps out a bit but it also leads to other errors: TypeError: window.require is not a function and TypeError: FileSync is not a constructor. So, I undo the last solution and get back with the fs.existsSync error.
The question:
How to fix the fs.existsSync error (in a NuxtJS environment)?
Did I implement Lowdb to NuxtJS correctly?
Related
This may seem simple but I have had a hard time trying to figure it out. I could not seem to find the solution on the web too.
//nodejs/models.js:
// City = ...
// ...
module.exports = {City, Country, Coupon, Player, Pollfish, Tree};
After zipping nodejs, I uploaded the zip file as an AWS Layer and added the layer to my Lambda function.
When I tried to retrieve the objects in my Lambda function:
import { createRequire } from 'module';
const require = createRequire(import.meta.url);
const {Player} = require('./models.js');
It resulted in an error:
2023-01-06T09:19:49.469Z undefined ERROR Uncaught Exception {"errorType":"Runtime.ImportModuleError","errorMessage":"Error: Cannot find module 'models.js'\nRequire stack:\n- /var/task/index.mjs","stack":["Runtime.ImportModuleError: Error: Cannot find module 'models.js'","Require stack:","- /var/task/index.mjs"," at _loadUserApp (file:///var/runtime/index.mjs:1000:17)"," at async UserFunction.js.module.exports.load (file:///var/runtime/index.mjs:1035:21)"," at async start (file:///var/runtime/index.mjs:1200:23)"," at async file:///var/runtime/index.mjs:1206:1"]}
So what should be the proper way to do it?
I got it! It should be:
const {Player} = require('/opt/nodejs/models.js');
I was trying to run tests using supertest in nodejs and I got this error message
ReferenceError: TextEncoder is not defined
Then i was advised to locate the file "node_modules/whatwg-url/lib/encoding.js" and add this lines of code at the top
const { TextEncoder, TextDecoder } = require("./utils");
After i did that, i started getting this message
TypeError: TextEncoder is not a constructor
please, i am using node version 17.4.0
I was testing a very simple module to see if it works and keep on getting an error stating that node cannot find my module.
//mymodule.js
greeting = 'hello'
module.exports = greeting;
// main.js
const s = require('exportsPractice\mymodule.js');
console.log(s);
The error I get is shown here
Try using:
const s = require('./exportsPractice/mymodule.js');
And make sure the path is correct.
Can't add a database connection to my small react app, i tried a bunch of npm modules: sqlite, sqlite3, realm. All fall back with type error:
TypeError: stream is undefined
i do absolutely nothing, just added a require statement in my component case that error:
import db from 'sqlite';
or:
var sqlite = require('sqlite3').verbose();
The last trace string:
(function (process){
module.exports = function (blocking) {
[process.stdout, process.stderr].forEach(function (stream) {
if (stream._handle && stream.isTTY && typeof stream._handle.setBlocking === 'function') {
stream._handle.setBlocking(blocking)
}
})
}
and real fails on building, with Error: Cannot find module 'AccessibilityInfo'
Your last trace points to the content of set-blocking npm module. Usually it is used by npmlog. It requires process.stderr and process.stdout to be present. In your case they aren't. If you are running the app in Electron that might be the case.
It probably means that you are attempting to run a nodejs library in the browser, and that will not work. You might be able to browserify the library.
I can't figure out why I get an undefined here for 'app':
module.exports = {
application: require('../../app').service,
request: require('supertest')(this.application),
startSetup: setup(this.application)
};
it throws up at the (this.application) for the request: line.
Yo can try this:
var app = require('../../app').service;
module.exports = {
application: app,
request: require('supertest')(app),
startSetup: setup(app)
};
The problems is that this.application doesn't exists yet.
You can't use the inside parts of an object that it is not defined (it is defined only after the final }).
Here is an example that you can try on your chrome console.
You can see that you can't use type because it is not defined.
Javascript doesn't know what this.application is. The object hasn't been defined yet so you can't use an attribute inside at object definition that's defined in the same object.