Category: javascript

I want to get the first element after the last on the next button clicked after the last.
currently, it shows blank spaces 4times then shows the first element.

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The code below is meant to put links in words, but it works only with english words, I would like it to work with arabic words too

The code

    <script>
// <![CDATA[
document.addEventListener("DOMContentLoaded", function(){
   var links = {
      "مغامرات": "https://www.example.com/search/label/%D9%85%D8%BA%D8%A7%D9%85%D8%B1%D8%A7%D8%AA",
      "East": "https://www.example.com/search/label/%D8%AE%D9%8A%D8%A7%D9%84",
   }
   
   var bodi = document.querySelectorAll("body *:not(script)");
   for(var x=0; x<bodi.length; x++){
      var html = bodi[x].innerHTML;
      for(var i in links){
         var re = new RegExp("([\s|&nbsp;]"+i+"(?:(?=[,<.\s])))", "gi");
         var matches = html.match(re);
         if(matches){
            matches = html.match(re)[0].trim();
            html = html.replace(re, function(a){
               return ' <a href="'+links[i]+'">'+a.match(/[A-zÀ-ú]+/)[0].trim()+'</a>';
            });
         }
      }
      bodi[x].innerHTML = html;
   }
});
// ]]>
</script>

I have a class like this:

export class Test {
  #foo
  #bar

  constructor() {}

  get foo() {
    if (!this.#foo) this.#foo = 1 * 1
    return this.#foo
  }

  get bar() {
    if (!this.#bar) this.#bar = 2 * 2
    return this.#bar
  }
}

I need all the getters results in this class so I want to invoke all of them.
I have tried to invoke them outside the class but there are private members in the class so I get an error:

TypeError: Cannot read private member #foo from an object whose class did not declare it

I have tried to invoke them inside the constructor by looping on Object.getOwnPropertyNames(this) but this don’t invoke the getters.

Is there a way I can invoke them inside the class so the getters can use the private members?

Thanks!

Codesandbox: https://codesandbox.io/s/gallant-cori-hdj5w?file=/src/App.js

I have this simple component with two animations: the first one on the height (from 0% to 100%) and the second one on the max-height.
I didn’t understand why they works but not at the same time: the second animation seems like waits the first animation to finish before to start.

The expected behaviour is that both the animation start and end together.

What is the problem?

For a project I am currently working on I’m trying to find a way that lets me turn a specific google sheets tab into a pdf using javascript

I’m trying to create a regex search in Datatables which matches a user who belongs to all selected groups.

Example:

User A belongs to Delta, Year 6, Year 6 Netball Team

User B belongs to Delta, Year 6 Netball Team

If Delta and Year 6 are selected as filters, only user A should show in the table. The problem I’m having is that both users are showing when these filters are selected. I don’t think the regex is matching exact strings and, after looking through multiple other answers, I don’t seem to be able to get it to do so.

My solution:

if (!this.items.length) {
    table.column(i).search('');
} else {
    let regex = '^';

    this.items.forEach(v => regex += `(?=.*\b${v}\b)`);

    regex += '.*$'

    table.column(i).search(regex, true, false, true)
}

Which results in: ^(?=.*bDeltab)(?=.*bYear 6b).*$

However, as shown, the user belonging to Delta,Year 6 Netball Team is still being returned.

I have a line chart that allows multiple lines to appear on the same chart depending on the items. However, the amount of items is different as it is based on individuals. Therefore, I would need to have get distinct colors for all the items. The users can pick which items to be visible on the chart. Therefore, the amount of colors needed will be increased when the user picking more items to be visible. As the amount of colors increases, each color should be distinct and distinguishable at first but gradually become similar to each other. Would like to know whether there is a library or segment of code to achieve the objective above?

I’m trying to figure out how to make this work.

I want the validation function to check if all the user inputs are true, then a message in success ID will show You have successfully created an account. once the submit button is clicked.

HTML:

<html>
  <head>
    <title>Simple Registration Form</title>
    <link rel="stylesheet" href="style.css" />
    <script type="text/javascript" src="script.js"></script>
  </head>
  <body>
    <form id="myForm" action="#">
      <div class="container">
        <div class="content">
          <label>
            First name:
            <br /><input
              type="text"
              id="fname"
              placeholder="Enter first name"
            /><br />
            <span class="notif" id="fn"></span><br />
          </label>

          <label>
            Last name:
            <br /><input
              type="text"
              id="lname"
              placeholder="Enter last name"
            /><br />
            <span class="notif" id="ln"></span><br />
          </label>

          <label>
            Birthdate:
            <br /><input
              type="date"
              id="birthdate"
              placeholder="Enter birthdate"
            /><br />
            <span class="notif" id="bday"></span>
          </label>

          <label>
            <br />Gender: <br /><select id="gender">
              <option value="select">Select</option>
              <option value="male">Male</option>
              <option value="female">Female</option></select
            ><br />
            <span class="notif" id="gndr"></span><br />
          </label>
        </div>
        <div class="content">
          <label>
            Username:
            <br /><input
              type="text"
              id="username"
              placeholder="Enter username"
              pattern="[a-zA-Z]+"
            /><br />
            <span class="notif" id="usr"></span><br />
            <div id="msg">
              <p id="alphabets" class="invalid">Alphabets only.</p>
            </div>
            <br />
          </label>

          <label>
            E-mail:
            <br /><input
              type="email"
              id="email"
              placeholder="Enter e-mail"
            /><br />
            <span class="notif" id="eml"></span><br />
            <div id="emlForm">
              <p id="emailFormat" class="invalid">Invalid format.</p>
            </div>
            <br />
          </label>

          <label>
            Confirm E-mail:
            <br /><input
              type="email"
              id="econf"
              placeholder="Retype e-mail"
            /><br />
            <span class="notif" id="rt-eml"></span><br />
          </label>

          <label>
            Password:
            <br /><input
              type="password"
              id="password"
              placeholder="Enter password"
            /><br />
            <span class="notif" id="pass"></span><br />
            <div id="message">
              <p id="letter" class="invalid">Lowercase letter</p>
              <p id="capital" class="invalid">Uppercase letter</p>
              <p id="number" class="invalid">Number</p>
              <p id="special" class="invalid">Special character</p>
              <p id="length" class="invalid">Minimum 8 characters</p>
            </div>
            <br />
          </label>

          <label>
            Confirm Password:
            <br /><input
              type="password"
              id="pconf"
              placeholder="Retype password"
            /><br />
            <span class="notif" id="rt-pass"></span><br />
          </label>
        </div>

        <div>
          <input
            type="submit"
            class="btn"
            onclick="validation(); validatePassword();"
            value="Submit"
          />
          <input
            type="reset"
            class="btn"
            id="reset"
            onclick="resetErrors();"
            value="Reset"
          />
          <br /><br />
        </div>
        <br /><span class="notif" id="success"></span><br />
      </div>
    </form>
    <script src="script.js"></script>
  </body>
</html>

JS:

function validation() {
  var fname = document.getElementById('fname').value;
  if (fname == '') {
    document.getElementById('fn').innerHTML = 'Please enter first name.';
  }
  var lname = document.getElementById('lname').value;
  if (lname == '') {
    document.getElementById('ln').innerHTML = 'Please enter last name.';
  }
  var birth = document.getElementById('birthdate').value;
  if (birth == '') {
    document.getElementById('bday').innerHTML = 'Please enter birthdate.';
  }
  var gender = document.getElementById('gender').value;
  if (gender == 'select') {
    document.getElementById('gndr').innerHTML = 'Please choose your gender.';
  }
  var username = document.getElementById('username').value;
  if (username == '') {
    document.getElementById('usr').innerHTML = 'Please enter username.';
  }
  var email = document.getElementById('email').value;
  if (email == '') {
    document.getElementById('eml').innerHTML = 'Please enter email.';
  }
  var econf = document.getElementById('econf').value;
  if (econf == '') {
    document.getElementById('rt-eml').innerHTML = 'Please confirm your email.';
  }
  if (econf != email) {
    document.getElementById('rt-eml').innerHTML = 'Email did not match.';
  }
  var password = document.getElementById('password').value;
  if (password == '') {
    document.getElementById('pass').innerHTML = 'Please enter password.';
  }
  var pconf = document.getElementById('pconf').value;
  if (pconf == '') {
    document.getElementById('rt-pass').innerHTML =
      'Please confirm your password.';
  }
  if (pconf != password) {
    document.getElementById('rt-pass').innerHTML =
      'Password did not match. Try again. ';
  }
}

function reset() {
  document.getElementById('myForm').reset();
}

function resetErrors() {
  document.querySelectorAll('.notif').forEach(el => (el.innerHTML = ''));
}

var alphabetInput = document.getElementById('username');
var alphabets = document.getElementById('alphabets');

alphabetInput.onfocus = function () {
  document.getElementById('msg').style.display = 'block';
};

alphabetInput.onblur = function () {
  document.getElementById('msg').style.display = 'none';
};

alphabetInput.onkeyup = function () {
  var alphabetOnly = /^[A-Za-z]+$/;
  if (alphabetInput.value.match(alphabetOnly)) {
    alphabets.classList.remove('invalid');
    alphabets.classList.add('valid');
  } else {
    alphabets.classList.add('valid');
    alphabets.classList.add('invalid');
  }
};

var emailInput = document.getElementById('email');
var emailFormat = document.getElementById('emailFormat');

emailInput.onfocus = function () {
  document.getElementById('emlForm').style.display = 'block';
};

emailInput.onblur = function () {
  document.getElementById('emlForm').style.display = 'none';
};

emailInput.onkeyup = function () {
  var emlFormat = /[@]/;
  if (emailInput.value.match(emlFormat)) {
    emailFormat.classList.remove('invalid');
    emailFormat.classList.add('valid');
  } else {
    emailFormat.classList.add('valid');
    emailFormat.classList.add('invalid');
  }
};

var myInput = document.getElementById('password');
var letter = document.getElementById('letter');
var capital = document.getElementById('capital');
var number = document.getElementById('number');
var length = document.getElementById('length');
var special = document.getElementById('special');

myInput.onfocus = function () {
  document.getElementById('message').style.display = 'block';
};

myInput.onblur = function () {
  document.getElementById('message').style.display = 'none';
};

myInput.onkeyup = function () {
  var lowerCaseLetters = /[a-z]/g;
  if (myInput.value.match(lowerCaseLetters)) {
    letter.classList.remove('invalid');
    letter.classList.add('valid');
  } else {
    letter.classList.remove('valid');
    letter.classList.add('invalid');
  }

  var specialCharacters = /[!@#$%^&*]/g;
  if (myInput.value.match(specialCharacters)) {
    special.classList.remove('invalid');
    special.classList.add('valid');
  } else {
    special.classList.remove('valid');
    special.classList.add('invalid');
  }

  var upperCaseLetters = /[A-Z]/g;
  if (myInput.value.match(upperCaseLetters)) {
    capital.classList.remove('invalid');
    capital.classList.add('valid');
  } else {
    capital.classList.remove('valid');
    capital.classList.add('invalid');
  }

  var numbers = /[0-9]/g;
  if (myInput.value.match(numbers)) {
    number.classList.remove('invalid');
    number.classList.add('valid');
  } else {
    number.classList.remove('valid');
    number.classList.add('invalid');
  }

  if (myInput.value.length >= 8) {
    length.classList.remove('invalid');
    length.classList.add('valid');
  } else {
    length.classList.remove('valid');
    length.classList.add('invalid');
  }
};

var their_date = new Date(2010, 6, 17);
var today = new Date();
var date2 = new Date(
  today.getFullYear(),
  today.getMonth() + 1,
  today.getDate()
);
var diff = new Date(date2.getTime() - their_date.getTime());
console.log(diff.getUTCFullYear() - 1970); // Gives difference as year

CSS:

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300&display=swap');
* {
  font-family: 'Poppins', sans-serif;
  font-weight: bold;
  margin: 0;
  padding: 0;
  line-height: 1;
  font-size: 14px;
  top: 20%;
}

.container {
  top: 100px;
  position: relative;
  width: 450px;
  max-width: 100%;
  grid-column-gap: 50px;
  margin: auto;
  display: grid;
  grid-template-columns: auto auto;
  padding: 10px;
  box-shadow: 0 3px 10px rgb(0 0 0 / 0.5);
  border-radius: 5px;
}

.content {
  margin: 0;
  padding: 0;
}

.btn {
  margin: 0;
  position: relative;
  top: 50%;
  -ms-transform: translateY(-50%);
  transform: translateY(-50%);
  width: 70px;
  height: 25px;
  cursor: pointer;
  align-items: center;
  border-radius: 5px;
}

.btn:active {
  background-color: rgb(190, 190, 190);
}

.notif {
  font-size: 11px;
  color: red;
}

input[type='date'] {
  overflow: hidden;
  padding: 0;
  width: 140px;
  -webkit-padding-start: 1px;
  border-radius: 5px;
  padding-left: 0.5em;
  font-size: 12px;
}

input[type='text'],
input[type='email'],
input[type='password'] {
  border-radius: 5px;
  padding-left: 0.5em;
  width: 180px;
  font-size: 12px;
}

span[id='success'] {
  color: rgb(0, 202, 0);
}

#message {
  display: none;
  background: #ffffff;
  color: #000;
  padding: 0;
  margin-top: 0;
  margin-left: 5px;
}

#message p {
  padding: 1px 2px;
  font-size: 12px;
}

/* Add a green text color and a "✔" when the requirements are right */
.valid {
  color: green;
}

.valid:before {
  position: relative;
  left: -3px;
  content: '✔';
}

/* Add a red text color and an "x" when the requirements are wrong */
.invalid {
  color: red;
}

.invalid:before {
  position: relative;
  left: -5px;
  content: '✖';
}

:required {
  background: red;
}

#msg {
  display: none;
  background: #ffffff;
  color: #000;
  padding: 0;
  margin-top: 0;
  margin-left: 5px;
}

#msg p {
  padding: 1px 2px;
  font-size: 12px;
}

/* Add a green text color and a "✔" when the requirements are right */
.valid {
  color: green;
}

.valid:before {
  position: relative;
  left: -3px;
  content: '✔';
}

/* Add a red text color and an "x" when the requirements are wrong */
.invalid {
  color: red;
}

.invalid:before {
  position: relative;
  left: -5px;
  content: '✖';
}

:required {
  background: red;
}

#emlForm {
  display: none;
  background: #ffffff;
  color: #000;
  padding: 0;
  margin-top: 0;
  margin-left: 5px;
}

#emlForm p {
  padding: 1px 2px;
  font-size: 12px;
}

/* Add a green text color and a "✔" when the requirements are right */
.valid {
  color: green;
}

.valid:before {
  position: relative;
  left: -3px;
  content: '✔';
}

/* Add a red text color and an "x" when the requirements are wrong */
.invalid {
  color: red;
}

.invalid:before {
  position: relative;
  left: -5px;
  content: '✖';
}

:required {
  background: red;
}

How can I make this work?

I have an array of objects, and I need to get list with certain property from that array of objects. But i need that list to contain only those values where object was containing another property with certain element.
This is very confusing so i made an example.
Let’s say i have an array with objects.

  employees = [
           {
            n: 'case 1',
            date: '2021-05-4',
            id: '123',
            user: [{name: 'Vlad', id: '1'}, {name: 'Misha', id: '2'}],
            isPresent : false,
           },
           {
            caseName: 'case 2',
            date: '2021-05-4',
            id: '124',
            user: [{name: 'Alina', id: '3'}, {name: 'Alex', id: '4'}],
            isPresent : false,
           },
           {
            caseName: 'case 3',
            date: '2021-05-4',
            id: '126',
            user: [],
            isPresent : true,
           },
        ]

And my task is to get a list of IDs from array of objects, but i need ID only from those objecrs which have isPresent as true.
So i need [‘123’, ‘124’].

I could use a loops and conditions and so on. But i wondering is it possible to do with one line ? Something like this:

employees.filter(item => { return item.isPresent === true }))

But i need only IDs not whole objects.

If the same element is more than one time then it will return true otherwise it will be false.
and push the return value data in output.

var array = [
  { id: 1, value: 10 },
  { id: 2, value: 10 },
  { id: 3, value: 10 },
  { id: 4, value: 56 },
  { id: 5, value: 56 }
]

Output will be like this

var output = [
  { id: 1, value: 10, matched: true },
  { id: 2, value: 10, matched: false },
  { id: 3, value: 10, matched: false },
  { id: 4, value: 56, matched: true },
  { id: 5, value: 56, matched: false }
]

As the title says,I’m trying to check if radio button is checked,but since document isn’t available,how am I supposed to do it? I want to achieve

<%if(radio1.checked){%>
 <%-include('./someHtml')%>
<%}%>

I am working on a project using webRTC API. Check the speaking status of the participant using the totalAudioEnergy property in the peerConnection’s stats object. The totalAudioEnergy property exists in chrome, but the totalAudioEnergy property itself does not exist in safari 15 version on macOS. If you know a solution please help

pc.getStats().then(stats=>{
    stats.forEach(res=>{
        if(res.type == 'media-source'){
            console.log(res)
        }
    })
})

there is an error on clicking on the map is triggered in, time. arrives in Promise, null. Explain why this is happening? Thank you in advance:

onMapClick(e) {
    if (e.latlng) {
    this.post("/api/MapObjectItem/GetObjectInfoByLatLng", {
      Lat: e.latlng.lat,
      Lng: e.latlng.lng
    }).then(result => {
      if (this.jkh.isCreateEvent) {
        this.jkh.selectedMessage = {
          Address: result.Address,
          Lat: result.Lat,
          Lon: result.Lng,
          UsersDataID: this.$auth.user.Id,
          ObjectID: result.Id,
          ToPublish: false
        };
        this.$refs.map.mapObject.setView([result.Lat, result.Lng], 18);
        this.showDetails();
      } else {
        this.obj = result;
        this.changeView();
      }
    });
  }

This Error Promise

Is it possible to stop the Save as website.html from appearing when you press CTRL + S in either HTML, Javascript, or CSS?

how do get value of datalist by selection of country. can i get value by onchange?

    <datalist id="countrydata" onchange="fun(this);">
     <option value="Afghanistan">Afghanistan</option>
     <option value="Åland Islands">Åland Islands</option>
     <option value="Albania">Albania</option>
     <option value="India">India</option>
   </datalist>
<label for="country">country</label>
<input type="text"
  list="countrydata"
  id="country" name="country"
  size="50"
  autocomplete="off" />
<script>
    function fun(el){
        var x = document.getElementById('countrydata').value;
        alert(x)
    }
 </script>