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Using API keys in a react app


Using API keys in a react app

By : Phil
Date : November 20 2020, 03:01 PM
This might help you 1. How to use variables in index.html?
Answer 1 : Please go through Adding Custom Environment Variables to find out how to add environment variables of the type that you have shown as an example.
code :


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How to react on special mouse keys in Java (forward/backward keys)

How to react on special mouse keys in Java (forward/backward keys)


By : Suburbanhvac
Date : March 29 2020, 07:55 AM
it fixes the issue Just implement a MouseListener and have a look at the mousePressed() event.
Quick and dirty program to test mouse buttons:
code :
package stackoverflowanswer;

import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class MouseListenerApp{
public static void main(String[] args) {        
    Runnable r = new Runnable(){
        @Override
        public void run() {
            JFrame frame = new JFrame("mouselistener"); 
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            frame.addMouseListener(new MouseListener() {
                @Override
                public void mouseClicked(MouseEvent e) {
                }

                @Override
                public void mousePressed(MouseEvent e) {
                    System.out.println(e.getButton());
                }

                @Override
                public void mouseReleased(MouseEvent e) {
                }

                @Override
                public void mouseEntered(MouseEvent e) {
                }

                @Override
                public void mouseExited(MouseEvent e) {
                }
            });

            frame.setSize(200,200);
            frame.setVisible(true);
        }
    };

    SwingUtilities.invokeLater(r);
    }
}
When working with lists and keys in React, can Keys contain whitespace/spaces?

When working with lists and keys in React, can Keys contain whitespace/spaces?


By : Abdullah Özbay
Date : March 29 2020, 07:55 AM
it helps some times In general, React does not care what characters are inside the string, it does not need to check. React uses the keys when checking uniqueness in the virtual DOM and the keys do not appear in the resulting HTML (any more). Therefore no HTML rules, especially not the ones defined for id apply here.
Why identifiers in HTML do not allow spaces? The reason is probably because they are used in CSS as #myIdentifier and spaces there would make the meaning ambigious.
React Keys : Understanding the behaviour of keys if defaultValue is used in Input field

React Keys : Understanding the behaviour of keys if defaultValue is used in Input field


By : Vladimir Hiuk
Date : March 29 2020, 07:55 AM
this one helps. To explain you the three cases with respect to your input case
First: indexes for keys,
React. How to deal with missing keys in API response using fetch and setState only for existing keys?

React. How to deal with missing keys in API response using fetch and setState only for existing keys?


By : arun
Date : March 29 2020, 07:55 AM
I hope this helps . This is a common problem, you need always to take this into consideration, what you should try to do is parsing the JSON and checking if the nodes you are looking for are defined or create a whitelist, also there is a lot of duplication in your code you can clean and make it more clear :
code :
whiteList = {
    dataSourceName:"co",
    dataSourceDetailsNO2:"no2",
    dataSourceDetailsPM10:"pm10",
    ...
    ...
}

parseData = (data) => {
    try{
        Object.entries(this.whiteList).forEach(([key, value]) => {

            this.setState({
               [key]:data.data.iaqi[value].v
            })
        })
    }catch(e){
        //handle Errors
    }
}


fetchStationDetails = () => {
    const {uid} = this.props;

    const urlStationDetails = `https://api.waqi.info/feed/@${uid}/?token=${apiKey}`;

    fetch(urlStationDetails)
        .then(res => res.json())
        .then(json => this.parseData(json)) 
        .catch(console.log)
}
Why is React complaining I do not have unique keys if my keys typeof number?

Why is React complaining I do not have unique keys if my keys typeof number?


By : user3732513
Date : March 29 2020, 07:55 AM
should help you out Keys have to be unique across their siblings. It's possible that you have other children that are being rendered inside of the parent container that share one or more of the keys you’re specifying here. Your '' + customer.id hack would work because 1 === '1' is false.
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