Category: javascript

For some reason when I try to reopen the first modal (editModal1) from the second modal via (data-bs-target="editModal1") I get the following error:

modal.js:332 Uncaught TypeError: Cannot read properties of undefined (reading 'classList')
    at De._isAnimated (modal.js:332:26)
    at De._initializeBackDrop (modal.js:205:24)
    at new De (modal.js:82:27)
    at Function.getOrCreateInstance (base-component.js:55:41)
    at HTMLButtonElement.<anonymous> (modal.js:434:22)
    at HTMLDocument.n (event-handler.js:120:21)
_isAnimated @ modal.js:332
_initializeBackDrop @ modal.js:205
De @ modal.js:82
getOrCreateInstance @ base-component.js:55
(anónimo) @ modal.js:434
n @ event-handler.js:120

This is my code:

$(document).ready(function() {

});

<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.6.0.js" integrity="sha256-H+K7U5CnXl1h5ywQfKtSj8PCmoN9aaq30gDh27Xc0jk=" crossorigin="anonymous"></script>

<table id="itemsTable" class="display nowrap" width="100%">
    <thead>
        <tr>
            <th>Column1</th>
            <th>Column2</th>
            <th>Edit</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>value1</td>
            <td>value2</td>
            <td>
                <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#editModal1">
                EDIT
                </button>                                               
            </td>
        </tr>
        <!-- modal -->
        <div class="modal fade" id="editModal1" tabindex="-1" aria-labelledby="newITTLModalLabel" aria-hidden="true">
            <div class="modal-dialog modal-xl modal-dialog-centered">
                <div class="modal-content">
                    <div class="modal-header" id="newTaskModalHeader">
                        <div class="col-8">
                            <h5 class="modal-title" id="newTaskModalLabel">Edit Modal</h5>
                        </div>
                        <div class="col-4">
                            <button type="button" class="btn btn-secondary new-task-dismiss rounded-0" data-bs-toggle="modal" data-bs-target="#cancelModal" data-bs-dismiss="modal">Cancel</button>
                            <button type="button" class="btn btn-primary rounded-0">Save</button>
                        </div>
                    </div>
                    <div class="modal-body">
                        <div class="row">
                            <div class="col-5 mt-3">
                                <ul class="list-unstyled">
                                    <li class="mt-3">
                                        <div class="row">
                                            <div class="col-sm ph-tabs-field-label">
                                                Name <span style="color:red;">*</span>
                                            </div>
                                            <div class="col-sm">
                                                <input type="text" name="name" class="form-control" aria-label="Name" required>
                                            </div>
                                        </div>
                                    </li>
                                </ul>
                            </div>
                            <div class="col mt-3">
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                    </div>
                </div>
            </div>
        </div>
        <!-- end modal -->
        <!-- cancel modal -->
        <div class="modal fade" id="cancelModal" tabindex="-1" aria-labelledby="Cancel" aria-hidden="true">
            <div class="modal-dialog modal-dialog-centered">
                <div class="modal-content">
                    <div class="modal-body">
                        <div class="row">
                            <h4 class="text-center" style="color:#013B4B;">Are you sure you want to cancel?</h4>
                        </div>
                        <div class="row mt-4">
                            <div class="col-3">
                            </div>
                            <div class="col-6 d-flex align-items-center justify-content-center">
                                <button type="button" class="btn btn-success btn-lg rounded-0" data-bs-dismiss="modal">Yes</button>
                                <button type="button" class="btn btn-danger btn-lg rounded-0" data-bs-target="editModal1" data-bs-toggle="modal" data-bs-dismiss="modal">No</button>
                            </div>
                            <div class="col-3">
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <!-- end cancel modal -->
    </tbody>
</table>

I want to reopen the first modal if I click "Are you sure you want to cancel? -> NO"

If I am not mistaken the problem is that when I click NO, editModal1 no longer exists in the DOM and that’s why I get that error but I don’t know how to fix it.

I’ve been looking at some previous stackoverflow questions about how to nest/concatenate multiple modals, unfortunately I couldn’t find a solution.

I am working on web crawling (using axios, cheerio to get html from website)so as per requirement I have to fetch images from all section A,B but issue is due to this images are static.. sometimes section A contain 2 images and sometimes section B contain 3 images.. so requirement is keep section A images in different variable and section B images in different variable. I got stuck here how to do this… no idea how to distinguish this.

<div class="container headingWrapper">
   <h3 class="DetailSection_heading ">Section A:</h3>
</div>

<div class="DetailSection_content">
  <div class="container">
    <div class="css-0">
      <div class="row justify-content-center">
        <div class="col-lg-6">
          <img src="https://img_url_1" alt="" class="DetailSectionImage" data-index="0">
          <img src="https://img_url_2" alt="" class="DetailSectionImage" data-index="0">
        </div>
      </div>
    </div>
  </div>
</div>

<div class="container headingWrapper">
   <h3 class="DetailSection_heading ">Section B:</h3>
</div>

<div class="DetailSection_content">
  <div class="container">
    <div class="css-0">
      <div class="row justify-content-center">
        <div class="col-lg-6">
          <img src="https://img_url_3" alt="" class="DetailSectionImage" data-index="0">
            <img src="https://img_url_4" alt="" class="DetailSectionImage" data-index="0">
        </div>
      </div>
    </div>
  </div>
</div>

jquery Code:

const Fetched_imgs = $('div.DetailSection_content img').map(function() {
  return $(this).attr("src")
}).get();

I have a script (in Python), that is called by another script (in JavaScript). And to have better readability of the log in my command line, I’d like that all the prints of the subscript (in Python) start with a tabulation. Is there a way to do that with one command, or should I put manually a t at the beginning of all my print?

I wanted to add the tab in the calling script, but when there are several prints in a row, only the first one gets the tab.

PS: if it can help, the calling of the Python script:

const spawn = require("child_process").spawn;
const pythonProcess = spawn('python3', ["../pythonscript.py"]);
pythonProcess.stdout.on('data', (data) => {          
  buff = Buffer.from(data.toString().trim(), "utf-8");

  console.log('Python answer = ' + buff.toString());
});

can somebody guide me? that how can I find the 25th largest element of array containing 30 elements.
I’m using javaScript to do so, If somebody has idea of this problem please share with me.

I have been stuck for days trying to pull data into my components from a Fetch API JSON result. As a React beginner, this has been a challenge for me and any direction to help me learn and resolve the issue is appreciated. I have the following JSON response copied below followed by my component setup.

My thoughts are that I am not pulling in the correct JSON key values in order or something along those lines.

JSON:

{
  "data": [
    {
      "virusIndex": 2,
      "temperature": 26.5,
      "humidity": 58.6,
      "pm25": 3,
      "tvoc": 234,
      "co2": 435,
      "co": 0,
      "airPressure": 991,
      "ozone": 8.7,
      "no2": 19.4,
      "timestamp": 1646109873
    }
  ],
  "usersettings": {
    "temperature": "°C",
    "temp": "c",
    "humidity": "%",
    "pm25": "µg/m^3",
    "dust": "µg/m^3",
    "tvoc": "ppb",
    "voc": "ppb",
    "co2": "ppm",
    "co": "ppm",
    "airPressure": "mbar",
    "pressure": "mbar",
    "ozone": "ppb",
    "no2": "ppb",
    "pm1": "µg/m^3",
    "pm4": "µg/m^3",
    "pm10": "µg/m^3",
    "ch2o": "ppb",
    "light": "lux",
    "sound": "dBA"
  },
  "count": 104
}

App.js:

class App extends Component {

  constructor(props) {
    super(props);
    this.state = {
      airData: []
    }
   }

componentDidMount(){
var myHeaders = new Headers();
      myHeaders.append("Authorization", "Bearer xxxxxxxxx");

      var urlencoded = new URLSearchParams();
      urlencoded.append("macAddress", "xxxxxxxx");
      urlencoded.append("mode", "minute");

      var requestOptions = {
      method: 'POST',
      headers: myHeaders,
      body: urlencoded,
      redirect: 'follow'
      };

  fetch("MY_API_URL", requestOptions)
   .then(response => response.json())
   .then(res => {
     console.log(res)
     this.setState({
       airData: res.data
     })
   });
  }


  
  render () {
        return (
          <div className="app">
            <Header />
            <div className="spacer"></div>
            <OverallStatus />
            {this.state.airData.map(res => {
                  <div>
                    <div className='qualityFactor'>
                      <h1><img src={iconHumidity} alt="Logo" className="iconSmall" />Humidity {res.humidity}%</h1>
                      <ProgressBar completed={res.humidity}
                      maxCompleted={100} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconAirPressure} alt="Logo" className="iconSmall" />Air Pressure {e.AirPressure} hPa</h1>
                      <ProgressBar completed={e.AirPressure}
                      maxCompleted={1030} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconCarbonDioxide} alt="Logo" className="iconSmall" />Carbon Dioxide {e.CO2} ppm</h1>
                      <ProgressBar completed={e.CO2}
                      maxCompleted={2000} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconVOCs} alt="Logo" className="iconSmall" />Chemicals {e.TVOC} ppb</h1>
                      <ProgressBar completed={e.TVOC}
                      maxCompleted={1000} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconParticulateMatter} alt="Logo" className="iconSmall" />Particles {e.PM25} ug/m3</h1>
                      <ProgressBar completed={e.PM25}
                      maxCompleted={100} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconCarbonMonoxide} alt="Logo" className="iconSmall" />Carbon Monoxide {e.CO} ppm</h1>
                      <ProgressBar completed={e.CO}
                      maxCompleted={100} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconNitrogenDioxide} alt="Logo" className="iconSmall" />Nitrogen Dioxide {e.NO2} ppb</h1>
                      <ProgressBar completed={e.NO2}
                      maxCompleted={200} className="statusBar" />
                    </div>
                    <div className='qualityFactor'>
                      <h1><img src={iconOzone} alt="Logo" className="iconSmall" />Ozone {e.Ozone} ppb</h1>
                      <ProgressBar completed={e.Ozone}
                      maxCompleted={100} className="statusBar" />
                    </div>
                  </div>
              })}
          </div>
        )
    }
  }
  
  

export default App;

i want to make an alert that have timer in it,
the alert will show this message:

Please wait to process data 3 second..

Please wait to process data 2 second..

Please wait to process data 1 second..

and if the timer is done, the text will change to
Succesfully process data..

I tried this one

    function countdown() {
    var seconds = 3;
    function tick() {
        var counter = document.getElementById("counter");
        seconds--;
        counter.innerHTML = "Please wait to process data " + String(seconds)+ " Second";
        if( seconds > 0 ) {
            setTimeout(tick, 1000);
        } else {
            alert("Succesfully process data");
        }
    }
    tick();
}

countdown();

<div id="results"></div>
<button id="stop">Stop</button>

but this code will show the timer in div not in alert, i tried to edit to make it show in alert but still can not figure it out, can you guys help me?
i really need your help thankyou

I’m having problems understanding JavaScript. I have the following assignment. I’m trying to add to the final cost. the Extra Cheese.

var extraCheeseUpcharge = 1.5
var extraCheese = confirm("Would you like extra cheese?")

if (extraCheese == true) {
  pizza.extraCheese =  true;
  extraCheese = extraCheeseUpcharge + pizza.cost;
} else {
   pizza.extraCheese =  false;
  extraCheese = extraCheeseUpcharge - pizza.cost;
  
}

Write an if/else statement that compares the value of the variables soldYesterday and soldToday, and based upon that comparison assigns salesTrend the value -1 or 1.

-1 represents the case where soldYesterday is greater than soldToday; 1 represents the case where soldYesterday is not greater than soldToday.

I have a React component that maps state to props to get data via redux. Everything works fine with the action and the value being updated properly in the reducer. My only problem is that when the state value changes, I want my component to re render so that it is always displaying the most up to date value in the reducer. As of right now I have to call a separate function that refreshes the component, but I’d rather have it automatically re render every time that value changes in the reducer.

Action:

export const createPickup = (selected, pickups) => dispatch => {
  let icon;
  icon = check(selected);
  pickups.icon = icon;
  return API('/createPickUp/', {
    ...pickups,
  })
    .then(res => {
      dispatch({type: types.CREATE_PICKUP, res});
    })
    .catch(err => console.log(err));
};

Reducer:

const initialState = {
  pick: [],
};
export default function pickup(state = initialState, action) {
  switch (action.type) {
    case types.GET_PICK:
      return {
        pick: action.pickup,
      };
    case types.CREATE_PICKUP:
      return {
        pick: [action.res, ...state.pick],
      };
    case types.DEL_GAME:
      return {
        pick: state.pick.filter(p => p._id !== action.id),
      };
    case types.START_GAME:
      return {
        pick: state.pick.map(p =>
          p._id === action.id ? {...p, start: true} : p,
        ),
      };
    case types.STOP_GAME:
      return {
        pick: state.pick.map(p =>
          p._id === action.id ? {...p, stop: true} : p,
        ),
      };
    default:
      return state;
  }
}

I’ve this regex for email

^[_a-z0-9-]+(.[_a-z0-9-]+)*(+[a-z0-9-]+)?@[a-z0-9-]+(.[a-z0-9-]+)*$

my test case is johnd@c but it returned true. What’s wrong here?

https://codesandbox.io/s/regex-forked-h7r6wk?file=/src/index.js:180-187

I’m coding an event function for my slider. I wanna get the value from the slider. However, it doesn’t work. And I found that the update function is never called, and _value is never updated.
Here is my HTML code

<input type="range" id="slider" min="20" max="200" value="20" step = "1">

Here is my js code

let slider = document.getElementById("slider");
let _value=20;
slider.addEventListener('oninput',update);
function update(event){
    console.log("hi");
    _value=slider.value;
}

I’m experimenting on using Google Lighthouse to detect JavaScript frontend libraries that I used on my web application. However, it seems to not be detecting some of the libraries that I’m using, such as foundation.js and Material UI. How do I ensure that all frontend libraries are detected?

I deployed my first MERN stack app on Heroku, it is basically a liquor inventory manager : https://stockify-inventory-manager.herokuapp.com/

However it is unable to access database. Whenever I make an Axios call, my requests get rejected. I’ve wasted 7 hours trying to fix it today but to no avail. Any help is appreciated.

Here is my server.js

const express = require('express')
const dotenv = require('dotenv').config()
const connectDB = require('./config/db')
const {errorHandler} = require('./middleware/errorMiddleware')
const port = process.env.PORT || 5000
const app = express()
const path = require('path')
const cors = require('cors')
const mongoose = require('mongoose')

connectDB()

app.use(express.json());
app.use(cors());

app.use('/api/users', require('./routes/userRoutes'))
app.use('/api/inventory', require('./routes/inventoryRoutes'))
app.use('/api/weekly', require('./routes/weeklyRoutes'))

mongoose.connect( process.env.MONGODB_URI, { useNewUrlParser: true })

// Serve frontend
if (process.env.NODE_ENV === 'production') {
    app.use(express.static(path.join(__dirname, '../frontend/build')))
  
    app.get('*', (req, res) =>
      res.sendFile(
        path.resolve(__dirname, '../', 'frontend', 'build', 'index.html')
      )
    )
  } else {
    app.get('/', (req, res) => res.send('Please set to production'))
  }
app.use(errorHandler)

app.listen(port, () => {
    console.log(`Server up on ${port}`)
})

This is my package.json

{
  "name": "stockify-inventory-manager",
  "version": "1.0.0",
  "description": "Manage your Alcohol Inventory easily",
  "main": "server.js",
  "scripts": {
    "start": "node backend/server.js",
    "server": "nodemon backend/server.js",
    "client": "npm start --prefix frontend",
    "dev": "concurrently "npm run server" "npm run client"",
    "heroku-postbuild": "NPM_CONFIG_PRODUCTION=false npm install --prefix frontend && npm run build --prefix frontend"
  },
  "author": "Steve Yoo",
  "license": "MIT",
  "dependencies": {
    "bcryptjs": "^2.4.3",
    "bootstrap": "^5.1.3",
    "colors": "^1.4.0",
    "cors": "^2.8.5",
    "dotenv": "^16.0.0",
    "express": "^4.17.3",
    "express-async-handler": "^1.2.0",
    "font-awesome": "^4.7.0",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^6.2.3",
    "react-router-dom": "^6.2.1"
  }
}

Here are checklists of what I tried:

1. Whitelist IP on mongoDB with 0.0.0.0/0
2. Double check connection string from mongoDB and way it is set up in .env
3. Check if any item is stuck in devdependencies instead of dependencies
4. Double check my Heroku config variables and ensure they match .env
5. Update nodejs to latest

If you need more clues source code is in my GitHub: https://github.com/dun1007/Stockify-Inventory-Manager

Datalabels on the top bars in chart are getting cut off, Could you please provide me some suggestions on the same
Chart image

I am working on google map using angular. I have used direction api and created roadways.
My requirement was to remove cities from the map by showing only state name. I achieved that, but now the issue is the cities which are the part of waypoints are also not displaying as shown in the image.

some portions of my code while setting up the google map is given below.

 options: google.maps.MapOptions = {
mapTypeId: google.maps.MapTypeId.ROADMAP,
zoom: 6,
styles: [

  {
    elementType: 'geometry',
    stylers: [
      {
        color: '#f5f5f5',
      },
    ],
  },
  {
    elementType: 'labels.icon',
    stylers: [
      {
        visibility: 'off',
      },
    ],
  },
  {
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#616161',
      },
    ],
  },
  {
    elementType: 'labels.text.stroke',
    stylers: [
      {
        color: '#f5f5f5',
      },
    ],
  },
  {
    featureType: 'administrative.land_parcel',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#bdbdbd',
      },
    ],
  },
  {
    featureType: 'poi',
    elementType: 'geometry',
    stylers: [
      {
        color: '#eeeeee',
      },
    ],
  },
  {
    featureType: 'poi',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#757575',
      },
    ],
  },
  {
    featureType: 'poi.park',
    elementType: 'geometry',
    stylers: [
      {
        color: '#e5e5e5',
      },
    ],
  },
  {
    featureType: 'poi.park',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#9e9e9e',
      },
    ],
  },
  {
    featureType: 'road',
    elementType: 'geometry',
    stylers: [
      {
        color: '#ffffff',
      },
    ],
  },
  {
    featureType: 'road.arterial',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#757575',
      },
    ],
  },
  {
    featureType: 'road.highway',
    elementType: 'geometry',
    stylers: [
      {
        color: '#dadada',
      },
    ],
  },
  {
    featureType: 'road.highway',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#616161',
      },
    ],
  },
  {
    featureType: 'road.local',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#9e9e9e',
      },
    ],
  },
  {
    featureType: 'transit.line',
    elementType: 'geometry',
    stylers: [
      {
        color: '#e5e5e5',
      },
    ],
  },
  {
    featureType: 'transit.station',
    elementType: 'geometry',
    stylers: [
      {
        color: '#eeeeee',
      },
    ],
  },
  {
    featureType: 'water',
    elementType: 'geometry',
    stylers: [
      {
        color: '#c9c9c9',
      },
    ],
  },
  {
    featureType: 'water',
    elementType: 'labels.text.fill',
    stylers: [
      {
        color: '#9e9e9e',
      },
    ],
  },
],};
this.map = new google.maps.Map(document.getElementById('googleMap'), {
  ...this.options,
  center: this.waypoints[0].location,
});

So I want a solution where I can show only the cities which are the part of the road path i.e the waypoints.