JavaScript

What is the difference between null and undefined in JavaScript?

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In JavaScript, null and undefined are both special values that represent the absence of a value. However, they have different use cases and behaviors. Here’s a detailed explanation of the difference between null and undefined: undefined: undefined is a primitive value in JavaScript. It is used to indicate the absence of an assigned value to … Read more

What are the different data types in JavaScript?

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What are the different data types in JavaScript? JavaScript has several built-in data types that are used to represent different kinds of values. Here are the different data types in JavaScript: Number:  Represents numeric values. It can be an integer or a floating-point number. For example: var age = 25; var temperature = 98.6; String:  … Read more

How do I make an HTTP request in Javascript

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In JavaScript, you can make an HTTP request using the XMLHttpRequest object or the newer fetch() function. Here’s an example of how to make an HTTP GET request using both methods: Using XMLHttpRequest: var xhr = new XMLHttpRequest(); xhr.open(“GET”, “https://api.example.com/data”, true); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var … Read more

How to Serialize Form data with Vanilla JavaScript

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You can use the FormData API in JavaScript. Here’s an example of how you can serialize form data: function serializeFormData(form) { var formData = new FormData(form); var serializedData = {}; for (var [name, value] of formData) { if (serializedData[name]) { if (!Array.isArray(serializedData[name])) { serializedData[name] = [serializedData[name]]; } serializedData[name].push(value); } else { serializedData[name] = value; } … Read more

Store object to localStorage Code Snippet

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The code defines two functions, addToStorage() and viewStorage(), that interact with the localStorage object in the browser. The addToStorage() function retrieves the values entered in two form fields using the getElementById() method, and creates an object called myObj with these values as properties. It then logs this object to the console using console.log(). Next, the … Read more

Top 10 Tips to write better JavaScript Code

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Using == instead of ===Not using const and letNot using semicolonsNot handling errorsNot using strict modeNot using curly bracesNot using Array.prototype.forEach()Not using const when defining functionsNot using the let keyword in for loopsNot using === or !== with null or undefined Using == instead of === Using == instead of === can lead to unexpected … Read more

Top 10 coding mistakes with JavaScript and how to avoid them

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top 10 coding mistakes with JavaScript and how to avoid them:  #javascript #learnjavascript #javascripttutorial #javascriptbeginner #javascriptintermediate #javascriptadvanced #javascripttips #javascripttricks #javascriptcode #javascriptproblems #javascriptchallenges #javascriptdom #javascriptajax #javascriptjquery #javascriptnode #javascriptreact #javascriptangular 1. Not declaring variables. When a variable is not declared, it is considered a global variable. This means that it can be accessed from anywhere in the … Read more

What’s the difference between using .textContent vs .innerText vs .innerHTML?

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All three of these properties are used to manipulate or get the text content of an element in HTML, but there are some important differences between them. Example: <div id=”example”> This is some <b>bold text</b>. </div> Using textContent on the div element will return “This is some bold text.”. Example: <div id=”example”> This is some … Read more