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Google Apps Scripts and Web Development Tutorials and Resources by Laurence Svekis
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
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
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
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: #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
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
JavaScript coding mistakes and their solutions: 1. Forgetting to close curly braces Curly braces are used to group statements in JavaScript. If you forget to close a curly brace, the JavaScript interpreter will not know where the statement ends, and this can lead to errors. Solution: Always make sure to close your curly braces. If … Read more
JavaScript Quiz Questions JavaScript var x = 1; var y = 2; console.log(x + y); Code snippet Output: 3 JavaScript var x = “Hello”; var y = “World”; console.log(x + y); Code snippet Output: HelloWorld JavaScript var x = 1; var y = 2; if (x > y) { console.log(“x is greater than y”); } … Read more
What is the difference between == and === in JavaScript? What is the difference between var, let, and const in JavaScript? What is the difference between an object and an array in JavaScript? What is the difference between a function declaration and a function expression in JavaScript? What is the difference between a closure and … Read more
JavaScript Quiz Questions and Answers 2 What is a closure in JavaScript and how do you create one?What is the difference between == and === in JavaScript?How do you declare a variable in JavaScript?What is the difference between null and undefined in JavaScript?How do you check if a variable is an array in JavaScript?What is … Read more