Category: javascript

written html as

<ng-container matColumnDef="AppointmentDate">
                      <mat-header-cell *matHeaderCellDef mat-sort-header> Date </mat-header-cell>
                      <mat-cell  *matCellDef="let row" appColordirective> {{row.appointmentDate|date: "yyyy-MM-dd"}} </mat-cell>
                    </ng-container>

I want to provide it green color when date matches with todays date. My directive code is ,

import { Directive, ElementRef,Input, OnInit } from '@angular/core';

@Directive({
  selector: '[appColordirective]'
})
export class ColordirectiveDirective implements OnInit {

  constructor(private element: ElementRef) {
    this.element.nativeElement.style.backgroundColor ="green";
   }
  ngOnInit(): void {
    
  }

}
```

any one please guide on this.

Recently, I met a requirement. I need create an input to recive amount from user properly.

At first, I want input number because the backend used bigint as storage type. It’s quite troublesome to convert between String and Number. What’s more troublesome is that I need to convert the numbers into units. But I know the number of JS is based on IEEE754 basic 64-bit binary floating-point. So there must be an accuracy loss problem here. Beacuse I was under the impression that as long as it was expressed in floating point numbers, then there must be numbers that could not be expressed accurately.

I remembered the example I saw before. I tried in my Chrome’s console.

console.log(0.2 + 0.1)
// 0.30000000000000004

This means the number 0.3 cannot be represented accurately. So I then proceeded with the following attempt.

const num = 0.3;
console.log(num);
// 0.3

I was surprised to find that the printout was actually accurate. But then I immediately calmed down and decided that this number was stored inaccurately at the memory. Even through it can be stored accurately, what about passed by json?

So this is my first question. Am I correct in this opinion? And how to explain the accurate print of 0.3?

In the end, I used string as input and regex to validate the string is a valid number of money. Then pass the string to the backend and let th server to parse and store.

So this is my second question. Is the method correct? Or there may be some other way better? Please guide me.

I am getting the error Cannot use import statement outside a module when importing a script in tamper monkey that uses import in the code.

How can I keep using that script? is there a way to set tamper monkey to use modules?
like type="module" that we use in script tags?

ExceptionsManager.js:179 Error: Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:

1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app

Getting this error in Playbutton component

Playbutton.js

import { useNavigation } from "@react-navigation/native";
import React, { useEffect, useState, useRef } from "react";
import { useSelector, useDispatch } from "react-redux";
import {
  View,
  Button,
  StyleSheet,
  Image,
  TouchableOpacity,
  Dimensions,
  NativeModules,
} from "react-native";

var deviceHeight = Dimensions.get("window").height;
var deviceWidth = Dimensions.get("window").width;
import useAppleFunction from "../CustomHooks/useAppleFunction";

const PlayButton = () => {
   
  useEffect(() => {
      useAppleFunction();
  }, []);

}

and here is the custom hook useApplefunction.js

import { StyleSheet, Text, View } from "react-native";
import React, { useEffect } from "react";
import { useSelector } from "react-redux";

const useAppleFunction = () => {
  const Playlist = useSelector((state) => state);
  console.log("reduxcheck=",Playlist);

  useEffect(() => {
    runtimer();
  }, []);

  const runtimer = () => {
     console.log("reduxcheck=1",Playlist);
  };
};

export default useAppleFunction;

const styles = StyleSheet.create({});

I have tried with mouse leave function in jquery with the following code

$(function () {
            $("#<%=txt_FromDate.ClientID %>").mouseleave(function () {
               // alert("Wow; Its Work!.")
               var txt_FromDate = document.getElementById('txt_FromDate');
               var txt_ToDate = document.getElementById('txt_ToDate');
               txt_ToDate.value = txt_FromDate.value;

           });
       });

The above code is working fine when mouse leave from the text box. but i need the effect when clicking calender txt_FromDate(from date) and it effect the same date in txt_ToDate(to date).

My html code is given below

<td style="text-align: left;" class="auto-style1">
                                                <asp:TextBox ID="txt_FromDate" runat="server" class="inputCalendar2_font14" Width="105px"
                                                    onfocus="showCalendarControl(this);" onkeypress="return false;" onpaste="return false;"
                                                    CssClass="inputCalendar2_font14"></asp:TextBox>
                                                &nbsp;&nbsp;&nbsp;&nbsp;
                                              <asp:TextBox ID="txt_ToDate" runat="server" class="inputCalendar2_font14" Width="105px" OnTextChanged="txt_ToDate_TextChanged"
                                                  onfocus="showCalendarControl(this);" onkeypress="return false;" onpaste="return false;"
                                                  CssClass="inputCalendar2_font14"></asp:TextBox>

My reference is given below,

<script src="../jScript/BrowserCompatibility.js" type="text/javascript"></script>
    <script src="../jScript/jquery-1.4.4.js" type="text/javascript"></script>
    <script src="../calenderCtr/CalendarControl.js" type="text/javascript" language="javascript"></script>
    <link href="../calenderCtr/CalendarControl.css" rel="stylesheet" type="text/css" />
    <script src="../jScript/Validator.js" type="text/javascript" language="javascript"></script>
    <link href="../style/dsi_mig.css" rel="stylesheet" type="text/css" />
     <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">

i can watch getter but can’t watch setter and i can get page、watchFun。why？enter image description here

When i run next build i get following error:

./node_modules/leaflet/dist/images/layers-2x.png
Module parse failed: Unexpected character '�' (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
(Source code omitted for this binary file)


> Build error occurred
Error: > Build failed because of webpack errors
    at /app/node_modules/next/dist/build/index.js:397:19
    at async Span.traceAsyncFn (/app/node_modules/next/dist/telemetry/trace/trace.js:60:20)
    at async Object.build [as default] (/app/node_modules/next/dist/build/index.js:77:25)
# 

my next.config.js seems to be configured to process .png files. Project uses leaflet and react-leaflet libraries. Error says nothing about images that I put in /public/images

const { i18n } = require('./next-i18next.config');
const theme = require('./app/styles/antdoverrides');

module.exports = {
    webpackDevMiddleware: (config) => {
        config.watchOptions = {
            poll: 800,
            aggregateTimeout: 300,
        };
        return config;
    },
    module: {
        loaders: [
            {
                test: /.(png|jpg|gif)$/,
                use: [
                    {
                        loader: 'file-loader',
                        options: {},
                    },
                ],
            },
        ],
    }
};

I am using scss in the node project, I started the server and refresh the browser page everything is running, but when I do some changes in the scss file and refresh the page CSS file didn’t update, I have to delete the CSS file and then when I refresh the browser new CSS file is created with updated code. Why scss didn’t update the CSS file?

I need your help redirecting the page which has embedded form and if the element is shown, I want it to redirect the a certain page. Thank you!

<script>
if ( receipt number (element) is shown it will redirect below ) {
  window.location.href = "https://www.example.com";
}
</script> ```
    

I have a google maps with a geojson that is loaded into the map.

Because the geojson takes 2-4 seconds to load, I want to put a loading circle.
However, when attempting the loading circle, the map comes up only when the tiles are loaded before the geojson is loaded. What is the proper lifecycle marker for waiting until the geojson is loaded?
Thanks

HTML:

<!DOCTYPE html>
<html>
<head>
    <title>Simple Map</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="css/main.css" />
    <script src="js/main.js"></script>
</head>
<body>
<h1>Hex Map</h1>
<div id="map_wrapper">
    <div id="map"></div>
</div>
<div id="mapinfo">Testbox</div>

<!-- Async script executes immediately and must be after any DOM elements used in callback. -->
<script
        src="https://maps.googleapis.com/maps/api/js?key=THEKEY&callback=initMap&v=weekly"
        async
></script>
</body>
</html>

JS:

let map;
var infowindow = null;

function initMap() {

    map = new google.maps.Map(document.getElementById("map"), {
        center: {lat: 30.1572523, lng: -92.0299477},
        zoom: 3,
    });

    google.maps.event.addListenerOnce(map, 'bounds_changed', function () {
        //alert(map.getBounds().getNorthEast().lat());
    });

    map.data.loadGeoJson(
      "hexmap.geojson"
    );

    google.maps.event.addListenerOnce(map, 'tilesloaded', function () {
        document.getElementById('map').style.opacity = 1;
    })
    map.data.setStyle({
        fillColor: 'green',
        strokeWeight: 1
    })

    // map.data.addListener('mouseover', function(event) {
    //     console.log(event.feature.getProperty('_uid1_'))
    //     document.getElementById('mapinfo').innerHTML = event.feature.getProperty('_uid1_');
    // })

    const constentString = 'hex + '

    map.data.addListener('click', function(event) {
        message = 'hex id: ' + event.feature.getProperty('_uid1_');
        infowindow && infowindow.close();
        infowindow = new google.maps.InfoWindow();
        infowindow.setContent(message);
        infowindow.setPosition(event.latLng);
        infowindow.open(map);

    })


}
//"https://drive.google.com/file/d/1v-VZtbbz4H2KiMvkRcc7nL_6JKQqlHwM/view?usp=sharing'"

CSS:

#map {
    height: 600px;
    width:800px;
    opacity:0;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

#map_wrapper {
    background:url(https://ressio.github.io/lazy-load-xt/dist/loading.gif) center center no-repeat;
    height: 600px;
    width:800px;
}

I’ve been trying to write a Chess program with HTML, CSS, and Javascript. I cannot seem to be getting the onclick function for the “PLAY AS WHITE” button to be working. I’ve checked my syntax in the Javascript part and believe it looks fine to me. Is there anything I’m doing wrong with the code?

Here’s the code:

let info = document.getElementById("info");

function playAsWhite() {
  info.innerHTML = "the message I want to output";
}

<h1 id="info">Playing as White:</h1>
<h1>Best move:</h1>
<p>NaN</p>
<input type="text" placeholder="Your input:" id="inputId1">
<button onclick="player1Turn()">Enter</button>
<input type="text" placeholder="Enemy input:" id="inputId2">
<button onclick="player2Turn()">Enter</button>
<div class="functions">
  <button onclick="playAsWhite()">PLAY AS WHITE</button>
  <button onclick="playAsBlack()">PLAY AS BLACK</button>
  <button onclick="reset()">RESET</button>
</div>

I’ve defined the source file (“main.js”) correctly, and the script is loaded at the end of body.

I’m building a simple React app (using Create React App + TypeScript) to record content from the user’s camera and mic, and save it to a downloadable video file (preferably mp4).

Currently, it seems like I can record video data, but when I download the file output it won’t open in QuickTimePlayer. Instead says the file is not compatible.

For reference, I’m on an M1 MacBook running MacOS BigSur Version 11.4. Also, I’m extremely new to React development and (although I’ve done a fair bit of TypeScript dev) I’ve never used the MediaRecorder API.

Kindly let me know what errors I made. Thank you!

import { FC, useRef, useState, useEffect } from 'react';

const App: FC = function () {

  /* ==== Component Data ==== */

  const recordingPreviewRef = useRef<HTMLVideoElement>(null!);
  const recordingDeviceRef = useRef<MediaRecorder>(null!);
  const recordingChunksRef = useRef<Blob[]>(null!);
  const [recordingURL, setRecordingURL] = useState("");
  const [isRecording, setRecordingState] = useState(false);
  

  /* ==== Helper Functions ==== */

  async function setUpRecording() {
    // Get User Media
    let recordingMedia = await navigator.mediaDevices.getUserMedia({ audio: true, video: true });

    // Set Up Recording Preview
    recordingPreviewRef.current.srcObject = recordingMedia;
    recordingPreviewRef.current.play();
    
    // Set Up Recording Device
    recordingDeviceRef.current = new MediaRecorder(recordingMedia, { mimeType: 'video/mp4' });
    recordingDeviceRef.current.ondataavailable = (event) => {recordingChunksRef.current.push(event.data)};
  }

  function startRecording() {
    setRecordingState(true);
    recordingDeviceRef.current.start();
    recordingChunksRef.current = [];
    console.log('Recording...');
  }

  function stopRecording() {
    recordingDeviceRef.current.stop();
    setRecordingState(false);
    saveRecording();
    console.log('Recording stopped.');
  }
  
  function toggleRecording() {
    if (!isRecording) {
      startRecording();
    } else {
      stopRecording();
    }
    // recordingDeviceRef.current.requestData();
  }

  function storeRecordingChunks(event: BlobEvent) {
    if (event.data.size > 0) {
      recordingChunksRef.current.push(event.data);
    }
  }

  function saveRecording() {
    let videoFile = new Blob(recordingChunksRef.current, { type: 'video/mp4' });
    let videoURL = window.URL.createObjectURL(videoFile);
    setRecordingURL(videoURL)
    recordingChunksRef.current = [];
  }

  /* ==== Component Life-Cycle Events ==== */

  useEffect(() => { 
    setUpRecording()
  }, [])


  /* ==== JSX Markup ==== */

  return (
    <>
      <video ref={recordingPreviewRef} muted></video>
      <section>
        <h1>Hello: {MediaRecorder.isTypeSupported('video/webm') ? 'A' : 'B'}</h1>
        <button onClick={() => toggleRecording()}>{ !isRecording ? 'Start Recording' : 'Stop Recording'}</button>
        <a href={recordingURL} download={'RecordedVideo.webm'}>Download</a>
      </section>
    </>
  )
}

export default App;

I want to load a JavaScript file in Webview with xamarin c#. while loading file, I am not getting content on webview, it just shows empty and in logs getting error

[chromium] [INFO:CONSOLE(2)] "Uncaught Error: getSessionData requires two non-null arguments (domain, keys).", source: https://sodexosms--univcrm.my.salesforce.com/embeddedservice/5.0/frame/session.esw.min.js (2)

Below file I am using

<html>
<head>
</head>
<body>
    <script type='text/javascript'>
        var initESW = function (gslbBaseURL) {
            embedded_svc.settings.displayHelpButton = true; //Or false
            embedded_svc.settings.language = ''; //For example, enter 'en' or 'en-US'
            embedded_svc.settings.enabledFeatures = ['LiveAgent'];
            embedded_svc.settings.entryFeature = 'LiveAgent';
            embedded_svc.init(
                'https://ulr.my.salesforce.com',
                'https://ulr.cs189.force.com/visualforce',
                gslbBaseURL,
                '00D7a00000055uj',
                'US_Universities',
                {
                    'baseLiveAgentContentURL': 'https://ulr.com/content',
                    'deploymentId': '5720Q08Oqg',
                    'buttonId': '570008PID',
                    'baseLiveAgentURL': 'https://ulr.salesforceliveagent.com/chat',
                    'eswLiveAgentDevName': 'EmbeddedServiceLiveAgent_Parent04I0UAQ_17d9a605e8e',
                    'isOfflineSupportEnabled': false
                }
            );
        };
        if (!window.embedded_svc) {
            var s = document.createElement('script');

            s.setAttribute('src', 'https://ulr/embeddedservice/5.0/esw.min.js');

            s.onload = function () {
                initESW(null);

            }
            document.body.appendChild(s);
        }
        else {
            initESW('https://service.force.com');
        }
    </script>
</body>
</html>

How can I fix it ?

I’m trying to create an array and then populate it using a function. I’m basically working on a retirement calculator application and I have a couple of initial values including age, retirement age, salary, salary increase, contribution to savings, savings, and interest rate on savings which I’m getting through a form. Next using those values as a starting point I want to create a table which will show the salary, savings, increase, etc for each year starting from the user’s starting age up until their retirement age. Similar to on this website https://www.bankrate.com/retirement/retirement-plan-calculator/.

So basically showing the yearly savings balance until retirement. My idea was to calculate these values and store it in an array and then map it onto a table. I’m very new to React and web programming in general so I honestly have no idea what I’m doing. Any help or suggestions are appreciated.

const Results = ({results}) => {

var age = results.age;
var retAge = results.retAge;
//var yearsToRet = retAge - age;
var salary = results.salary;
var increase = results.increase;
var cont = results.cont;
var savings = results.savings;
var interest = results.interest;
var retSavings = savings;

//To format the results as dollar value
const formatter = new Intl.NumberFormat("en-US", {style: "currency", currency: "USD", minimumFractionDigits: 2})

//Calculating savings during retirement
for(var i = age; i < retAge; ++i)
{
    //new salary with increase
    salary += salary * (increase/100);
    retSavings +=  salary*(cont/100) + retSavings*(interest/100); 
}

const savingsList = [
    {
        age: results.age,
        retAge: results.retAge,
        salary: results.salary,
        increase: results.increase,
        cont: results.cont,
        savings: results.savings,
        interest: results.interest,
        retSavings: savings,
    }
];
console.log(savingsList);

return(
    <><div className='results'>
        <h3> At retirement age of {retAge}, {results.name} will have a total savings of {formatter.format(retSavings)}</h3>
    </div></>
)

}

I can open the file in binary mode with Python and store it in a variable.
I have been researching this for two days, and I can’t seem to find a straightforward answer. I need this because I have been working on a project that we have completed in Python, but we need to convert it into JavaScript. The issue that I’m having is that I need to send a file through an API call. Still, every time I do, I get this error ‘ HTTP 415 Unsupported Media TypeThe provided media type is not supported for the requested URI. What I have is a JSON file that I need to pass to a post-call in binary

files = {'file': open(JSON_File, 'rb')}
response = requests.post(
    URL, 
    auth=(USERNAME, PASSWORD),
    files=files
    #files=files, verify = False
)

response.text

how can I do this in nodeJS? I completed the above already in Python.