Array.prototype.fill() with object passes reference and not new instance in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:37:34
To fix this, you can use map() in JavaScript.The syntax is as follows −var anyVariableName= new Array(yourSize).fill().map(Object);ExampleFollowing is the code −var arrayOfObject = new Array(5).fill().map(Object); console.log(arrayOfObject);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo311.js.OutputThis will produce the following output −PS ... Read More

How to make a setInterval() stop after some time or after a number of actions in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:35:27
Use some conditions to stop after some time.The below code will stop in half a minute.ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1.0">    <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <body> <script>    var now = new Date().getTime(); ... Read More

How to sort an array of integers correctly in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:31:55
To sort an array of integers, use sort() in JavaScript.ExampleFollowing is the code −var arrayOfIntegers = [67, 45, 98, 52]; arrayOfIntegers.sort(function (first, second) {    return first - second; }); console.log(arrayOfIntegers);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo310.js.OutputThis will ... Read More

How to stop the loop for JavaScript scroll down?

AmitDiwan
Published on 26-Oct-2020 15:29:34
To stop the loop, use clearInterval() in JavaScript.ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1.0">    <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <body> <script>    var start = 0;    var limit = 200;    var scroll = ... Read More

JavaScript subtraction of two float values?

AmitDiwan
Published on 26-Oct-2020 15:27:11
To correctly subtract two float values, use parseFloat() along with toFixed().ExampleFollowing is the code −var firstValue=4.3; var secondValue=3.8; console.log("The first Value="+parseFloat(firstValue).toFixed(1)+" The second Value="+parseFloat(secondValue).toFixed(1)) var result = parseFloat(firstValue).toFixed(1) - parseFloat(secondValue).toFixed(1); console.log("Result is="+result);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo309.js.OutputThis ... Read More

Use jQuery to get values of selected checkboxes?

AmitDiwan
Published on 26-Oct-2020 15:22:59
Yes, we can use jQuery to get values of selected checkboxes using the concept of input. We have to also use the :checked selector.ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1.0">    <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> ... Read More

Replace whitespace in different elements with the same class in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:20:34
For this, you can use dot(.) notation along with each().ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1.0">    <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <body>    <p class="demo">Javascript Tutorial</p>    <p class="demo">MySQL Tutorial</p>    <p class="demo">MongoDB Tutorial</p> </body> ... Read More

How can I show a hidden div when a select option is selected in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:16:32
To show a hidden div when a select option is selected, you can set the value “style.display” to block.ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <style>    #hideValuesOnSelect {       display: ... Read More

Why addEventListener to 'select' element does not work in JavaScript?

AmitDiwan
Published on 26-Oct-2020 15:11:06
Instead, use querySelector() along with addEventListener().ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <body>    <select id="selectDemo">       <option value="Java">Java</option>       <option value="Javascript">Javascript</option>       <option value="MySQL">MySQL</option>     ... Read More

How to dynamically create radio buttons using an array in JavaScript?

AmitDiwan
Published on 26-Oct-2020 13:58:48
To dynamically create radio button using an array, use the concept of createElement() and appendChild().ExampleFollowing is the code −<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css"> <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <body> </body> <script>    var gender = ['Male', 'Female'];    gender.forEach((genederValue, i) ... Read More
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