Tutorials References Exercises Videos Menu
Create Website Get Certified Upgrade
HTML CSS JAVASCRIPT SQL PYTHON JAVA PHP BOOTSTRAP HOW TO W3.CSS C C++ C# REACT R JQUERY DJANGO TYPESCRIPT NODEJS MYSQL


HOW TO

HowTo Home

Menus

Icon Bar Menu Icon Accordion Tabs Vertical Tabs Tab Headers Full Page Tabs Hover Tabs Top Navigation Responsive Topnav Split Navigation Navbar with Icons Search Menu Search Bar Fixed Sidebar Side Navigation Responsive Sidebar Fullscreen Navigation Off-Canvas Menu Hover Sidenav Buttons Sidebar with Icons Horizontal Scroll Menu Vertical Menu Bottom Navigation Responsive Bottom Nav Bottom Border Nav Links Right Aligned Menu Links Centered Menu Link Equal Width Menu Links Fixed Menu Slide Down Bar on Scroll Hide Navbar on Scroll Shrink Navbar on Scroll Sticky Navbar Navbar on Image Hover Dropdowns Click Dropdowns Cascading Dropdown Dropdown in Topnav Dropdown in Sidenav Resp Navbar Dropdown Subnavigation Menu Dropup Mega Menu Mobile Menu Curtain Menu Collapsed Sidebar Collapsed Sidepanel Pagination Breadcrumbs Button Group Vertical Button Group Sticky Social Bar Pill Navigation Responsive Header

Images

Slideshow Slideshow Gallery Modal Images Lightbox Responsive Image Grid Image Grid Tab Gallery Image Overlay Fade Image Overlay Slide Image Overlay Zoom Image Overlay Title Image Overlay Icon Image Effects Black and White Image Image Text Image Text Blocks Transparent Image Text Full Page Image Form on Image Hero Image Blur Background Image Change Bg on Scroll Side-by-Side Images Rounded Images Avatar Images Responsive Images Center Images Thumbnails Border Around Image Meet the Team Sticky Image Flip an Image Shake an Image Portfolio Gallery Portfolio with Filtering Image Zoom Image Magnifier Glass Image Comparison Slider Favicon

Buttons

Alert Buttons Outline Buttons Split Buttons Animated Buttons Fading Buttons Button on Image Social Media Buttons Read More Read Less Loading Buttons Download Buttons Pill Buttons Notification Button Icon Buttons Next/prev Buttons More Button in Nav Block Buttons Text Buttons Round Buttons Scroll To Top Button

Forms

Login Form Signup Form Checkout Form Contact Form Social Login Form Register Form Form with Icons Newsletter Stacked Form Responsive Form Popup Form Inline Form Clear Input Field Hide Number Arrows Copy Text to Clipboard Animated Search Search Button Fullscreen Search Input Field in Navbar Login Form in Navbar Custom Checkbox/Radio Custom Select Toggle Switch Check Checkbox Detect Caps Lock Trigger Button on Enter Password Validation Toggle Password Visibility Multiple Step Form Autocomplete Turn off autocomplete Turn off spellcheck File Upload Button Empty Input Validation

Filters

Filter List Filter Table Filter Elements Filter Dropdown Sort List Sort Table

Tables

Zebra Striped Table Center Tables Full-width Table Side-by-side Tables Responsive Tables Comparison Table

More

Fullscreen Video Modal Boxes Delete Modal Timeline Scroll Indicator Progress Bars Skill Bar Range Sliders Tooltips Display Element Hover Popups Collapsible Calendar HTML Includes To Do List Loaders Badges Star Rating User Rating Overlay Effect Contact Chips Cards Flip Card Profile Card Product Card Alerts Callout Notes Labels Circles Style HR Coupon List Group List Group with Badges List Without Bullets Responsive Text Cutout Text Glowing Text Fixed Footer Sticky Element Equal Height Clearfix Responsive Floats Snackbar Fullscreen Window Scroll Drawing Smooth Scroll Gradient Bg Scroll Sticky Header Shrink Header on Scroll Pricing Table Parallax Aspect Ratio Responsive Iframes Toggle Like/Dislike Toggle Hide/Show Toggle Dark Mode Toggle Text Toggle Class Add Class Remove Class Active Class Tree View Remove Property Offline Detection Find Hidden Element Redirect Webpage Zoom Hover Flip Box Center Vertically Center Button in DIV Center a List Transition on Hover Arrows Shapes Download Link Full Height Element Browser Window Custom Scrollbar Hide Scrollbar Show/Force Scrollbar Device Look Contenteditable Border Placeholder Color Disable Resizing of Textarea Disable Text Selection Text Selection Color Bullet Color Vertical Line Dividers Animate Icons Countdown Timer Typewriter Coming Soon Page Chat Messages Popup Chat Window Split Screen Testimonials Section Counter Quotes Slideshow Closable List Items Typical Device Breakpoints Draggable HTML Element JS Media Queries Syntax Highlighter JS Animations JS String Length JS Exponentiation JS Default Parameters Get Current URL Get Current Screen Size Get Iframe Elements

Website

Create a Free Website Make a Website Make a Static Website Host a Static Website Make a Website (W3.CSS) Make a Website (BS3) Make a Website (BS4) Make a Website (BS5) Create and View a Website Create a Link Tree Website Create a Portfolio Create a Resume Make a Restaurant Website Make a Business Website Make a WebBook Center Website Contact Section About Page Big Header Example Website

Grid

2 Column Layout 3 Column Layout 4 Column Layout Expanding Grid List Grid View Mixed Column Layout Column Cards Zig Zag Layout Blog Layout

Google

Google Charts Google Fonts Google Font Pairings Google Set up Analytics

Converters

Convert Weight Convert Temperature Convert Length Convert Speed

Blog

Get a Developer Job Become a Front-End Dev.

How TO - Online Offline Detection

❮ Previous Next ❯

Learn how to detect whether the browser is online or offline with JavaScript.

Offline Detection

The onLine property of the Navigator object returns a Boolean value that specifies whether the browser is in online or offline mode:

Example

Find out whether the browser is online:

var x = "Is the browser online? " + navigator.onLine;
Try it Yourself »

Read more about the Navigator Object in our JavaScript Navigator Tutorial.


❮ Previous Next ❯