I'm using the following library in Node.js:
https://popper.js.org/popper-documentation.html
My code is as follows:
const Popper = require("popper.js");
Popper.Defaults.modifiers.computeStyle.gpuAcceleration = false;
I get the error 'Cannot read property 'modifiers' of undefined'.
Why is Popper.Defaults undefined when it is a static property and how can I fix the error?
Related
I am trying to get a part of a string.
let someValue = 'basic jkclwkjkvhrvhkuirhiehvyrbuyrbevnervnhrev';
let getSubstringValue = someValue.substring(6);
But, in my node JS server gives,
TypeError: Cannot read properties of undefined (reading 'substring')
Also used 'substr' using 'this answer'. But it also gave this 'TypeError: Cannot read properties of undefined (reading 'substr')' error.
Can you debug someValue if it is a string?
If it's undefined, you get the error
TypeError: Cannot read properties of undefined
Simple example of substring:
exampleVal = 'test';
// remove the first character
exampleVal = exampleVal.substring(1);
// show results (output is 'est')
console.log(exampleVal);
// example for if exampleVal is undefined
let exampleVar = undefined;
exampleVar = exampleVar.substring(1);
console.log(exampleVar);
// error is thrown
// TypeError: Cannot read properties of undefined (reading 'substring')
I'm new to Vue. I have a Vue file and in the section I use an import command.
<script>
import Module from '../module.js'
module.js uses module.exports.example1 = function() { return true }
However, this fails with the error: Uncaught TypeError: Cannot set property 'example1' of undefined
When I do console.log(module) it also shows exports as undefined.
Why is exports undefined? Is there a better place I should place this module?
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?
I'm getting this error: TypeError: Cannot read property 'basename' of undefined
when assigning the variable.
var basename = path.basename(module.filename);
but when I console log the value it displays the file.
console.log(path.basename(module.filename)) => server.js
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.