Category : undefined

Can anyone please help explain this unexpected behavior? I have a working useSessionStorage hook from https://typeofnan.dev/using-session-storage-in-react-with-hooks/ that looks like the following: import { useState, useEffect } from ‘react’; function getSessionStorageOrDefault(key, defaultValue) { if (typeof sessionStorage === ‘undefined’) { return defaultValue; } const stored = sessionStorage.getItem(key); if (!stored) { return defaultValue; } return JSON.parse(stored); } function ..

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Help ! I’m getting the following error from my Angular (material) application: TypeError: ctx.product is undefined my service:product.service.ts @Injectable({ providedIn: ‘root’ }) export class ProductService { baseUrl = ‘http://localhost:3000/products’; constructor( private http: HttpClient, private router: Router, private snackBar: MatSnackBar) { } // Headers private httpOptions = { headers: new HttpHeaders({ ‘Content-Type’: ‘application/json’ }) }; showMessage(msg: ..

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I have to write a function that will return the closest relative (parent or child) with the given tagName. Here is my code: function closestRelative(parent, relativeName) { var closestParent = parent.parentNode.closest(relativeName); var childrenElements = parent.children; var closetChild; for(var i=0; i<childrenElements.length; i++) { if(childrenElements[i].tagName === relativeName.toUpperCase()){ closestChild = childrenElements[i]; } } console.log(closestChild.tagName); //if(closestParent) return closestParent.tagName; //if(closestChild) ..

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I have an JS file in a npm enviornment and it and its associated package.json is given below. I receive the following ERROR, while running the file ‘app.js’. TypeError: Cannot read property ‘setDefault’ of undefined I am not able to access moment.tz() as it is getting the value of undefined. app.js import moment from "moment"; ..

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I am using recordJs library for recording voice of client and send it to the server. In firefox and other browsers, it works well without any error. when i try to run it in chrome, it starts recording the voice, but when it calls stopRecording function, it faces following error: Uncaught TypeError: Cannot read property ..

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class SearchBar extends React.Component { state = { term: "Search" }; onFormSubmit(event) { event.preventDefault(); console.log(this); } render() { return ( <div className="ui segment"> <form onSubmit={this.onFormSubmit} className="ui form"> <div className="field"> <label>Image Search</label> <input type="text" onChange={(e) => this.setState({ term: e.target.value })} onClick={(e) => this.setState({ term: "" })} value={this.state.term} /> </div> </form> </div> ); } } Error TypeError: ..

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For my code challenge, I have to: Create a variable called myFriend using one of the variable declarations described above (var, let, const). Set the variable you created to contain your friend’s name. Inside the greetings function, return the string: "Greetings [your-friend’s-name]." Note: The following line of code console.log(‘results: ‘, greetings()); will print the result ..

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