Name the eight data types in JavaScript. Understand the difference between single, double, and backtick quotes. Embed a variable/expression in a string. Understand what a method is. Name the three logical operators. Understand what the comparison operators are. ...
Type checking with typeof is especially useful for most of the primitive types in JavaScript, including undefined, string and number.On the other hand, Array, Date and Regular Expressions are native objects that are not differentiated from each other by typeof. They all return "object"— as ...
We're going to explore some options that I wish I knew about when I started tinkering on the web. We'll look at JavaScript in the browser and Node.js on the back end. We'll also look at some lightweight databases that use the local file system. Node.js First up is JSON serializing...
CSS types CSS units For more information, see theCSS datadocumentation and theUpdating CSS JSON DBguide. l10n The l10n folder contains localization strings that are used in the various json files throughout this repository. Problems? If you find a problem, pleasefile an issue. ...
mdn-bot Release v5.6.36 (#25831) 70ba746· Feb 5, 2025 History18,217 Commits .github .husky .vscode api browsers css docs html http javascript lint mathml release_notes schemas scripts svg types utils webassembly ...
Data types in JavaScriptJavascript and Javascript object notation (JSON) are not very well suited for reading database records. Decimal, date/time, binary and geometry types must be represented as strings in JSON (binary is base64 encoded, geometries are in WKT format). Below are two more ...
csstype- NPM package that publishes strict TypeScript/Flow types for CSS. Compat Report- Firefox Add-on that shows BCD data for the current site in the developer tools. compat-tester- NPM package that scans HTML, CSS and JS files for compatibility issues. ...
JavaScript use-cases The concept is that you can use data attributes to put information in HTML that JavaScript may need access to do certain things. A common one would have to do with database functionality. Say you have a “Like” button: ...
Alright, let's look at how this pattern is applied across different input types. Text inputs Here's a more complete example of a text input bound to React state: Code Playground Reset Code Show line numbersFormat code using PrettierOpen in CodeSandbox import React from 'react'; function App...
Let’s say that we have two types of input: Aselectelement Aninputelement And let’s say that the first contains a set of default elements and the second is designed for the user to specify their own, custom content. The markup might looksomething like this: ...