⤳ The error “TypeError: getElementById is not a function” happens for two common reasons (Based on StackOverflow users): Here’s what this error looks like in the browser’s console: How to fix the “TypeError: getElementById is not a function” error Before anything, let’s have a refresher from ...
⤳ If you’re looking for a shorthand version of if/else statements in JavaScript, you need to use the ternary – a.k.a the conditional – operator. The ternary operator takes three operands: a condition followed by a question mark (?), and two JavaScript expressions separated by a colon (:). ...
⤳ What are those double not operators in JavaScript? You might have noticed a double exclamation mark (!!) in JavaScript code and you may be curious what that means. First, “double exclamation mark” (a.k.a the “double bang”) isn’t an operator itself. It’s two logical not (!) operators ...
⤳ The error “__dirname is not defined in ES module scope” occurs if you refer to the __dirname global variable in an ES (ECMAScript) module. Here’s what the error message looks like: This global variable contains the path to the current module’s directory. The __dirname and ...
⤳ In JavaScript, to check if an element exists or not, you need to access it first. You can use one the following methods to access DOM elements: Whenever you access a web page, the web browser parses the HTML code and populates a DOM tree ...
⤳ If you’re looking for the JavaScript isset equivalent, you’ve probably used it in PHP before and want the same functionality in JavaScript. As you probably know, PHP’s isset() function checks a variable is declared and not null. Although JavaScript doesn’t have an isset equivalent, there are ...
⤳ In this guide, you’ll learn how to do integer division in JavaScript. The division operator in JavaScript (/) divides two numbers (dividend and divisor) and returns the quotient as a floating point number (rather than the quotient and the remainder of a division separately). All numbers in ...
⤳ If you want to “replace space with dash” in PHP, you can do so with the str_replace() function. We usually replace spaces with dashes to generate a URL-friendly slug from a given string, but you might need them for other purposes. The str_replace() function accepts ...
⤳ There’s no built-in function in PHP to flatten a multidimensional array, but it’s not a difficult thing to do in PHP. In fact, it’s quite easy. We usually flatten arrays of data fetched from a database or an API. In real-world scenarios, we’d usually want ...
⤳ PHP double question marks (??) – officially known as Null coalescing operator – is a convenient alternative to ternary expressions in conjunction with isset(). You might have seen the following expression in your Laravel or PHP projects: But what do two question marks mean in PHP? ...