⤳ 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 Javascript shorthand for if/else statements, you’re probably looking for the ternary – a.k.a the conditional – operator. JavaScript ternary operator takes three operands: a condition followed by a question mark (?), and two JavaScript expressions separated by a colon (:). The expression on ...
⤳ What are those double not operators in JavaScript? You might have noticed the JS double exclamation mark (!!) in a code snippet, 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 ...
⤳ 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? ...