Linked Questions
12 questions linked to/from TypeError: Cannot read property 'setState' of undefined
5
votes
1
answer
17k
views
ReactJS Cannot read property setState of undefined [duplicate]
I am new to ReactJS, and somewhat understand that this question is duplicated to numeral questions in SOF.
But I hope someone can give me some directions and clarifications on some concepts of React.
...
- 705
7
votes
1
answer
3k
views
react loses 'this' context inside promise [duplicate]
I am quite new with react and am probably making a silly mistake. I am trying to make an api call with axios that returns a promise. When this promise resolves I would like to pass the result of this ...
- 1,261
0
votes
1
answer
709
views
TypeError: Cannot read property 'setState' of undefined in respone of axios get data in react JS [duplicate]
Am trying to place autosuggest with api result.
import React, { Component } from "react";
import Autosuggest from "react-autosuggest";
import axios from "axios";
// When suggestion is clicked, ...
- 276
2
votes
0
answers
262
views
Uncaught TypeError: this.setState is not a function when mapping dbData into treeData[react] [duplicate]
I have a problem:
I am Loading data from MySQL Database and pasting them in a treeview form however, I keep on getting this error mentioned in the title, and it logs in an infinite loop.
What I ...
- 93
0
votes
0
answers
24
views
setState Undefinded error from fetch request [duplicate]
This fetch request:
var url = 'api/assetName/?id='+id;
fetch(url, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
...
- 623
1
vote
4
answers
3k
views
use axios with react to get data from api
I am trying to use axios to get data from the api (https://reqres.in/) and display in my react app. Before this I fetched the data from the API using fetch method in javascript. Now I have tried ...
- 93
2
votes
1
answer
2k
views
TypeError: Cannot read property 'info' of undefined
I am very new to react and I am having issues when it comes to passing data from one method to another method.
Here is my react syntax:
var url = "https://quotesondesign.com/wp-json/posts?filter[...
user8156106
2
votes
1
answer
652
views
React - setting state to display a message for validation errors in form leads to :Cannot read property 'setState' of undefined - Why?
I have a signup form and from server side, I check if field is empty, if it is, then I res.send("xxx"), then from fronend I want to set state to a message to be displayed. With my code (below) I am ...
- 1,153
0
votes
1
answer
488
views
React state update in ajax success
I'm having problems with setting my state when a ajax call is successfully run. I want to update the state when the ajax process is completed.
The text in the div stays on "Busy" instead of "Done", ...
- 1,450
-2
votes
2
answers
279
views
React.js - Cannot read property 'strikes' of undefined error
import React, {Component} from 'react';
import './App.css';
class App extends Component {
render() {
return (
<div className="container">
<LightningCounterDisplay/>
</div>
...
- 1,031
0
votes
1
answer
62
views
Reactjs problems when ajax data from json file
I have a problem when I develop a react web application. Here's my code:
class TableContentRow extends React.Component {
render(){
return(
<tr>
...
- 51
0
votes
0
answers
42
views
How to loop and map value from API inside JSX in React.js? [duplicate]
How to loop and map value from API inside JSX in React.js? And for mapping what are the thing I've to import?
My Code:
eventlistClick (){
var apiBaseUrl = "http://api.eventsacross-stage....
- 9,930