Creating WebP Images with the Command Line
In this codelab, learn how to serve optimized images using WebP.
Working with service workers
In this codelab, learn how to make an application reliable by registering a service worker.
Specifying multiple slot widths
In this codelab, learn how to use the sizes attribute to size images correctly depending on the user's viewport.
Google Community Guidelines and Anti-Harassment Policy for In-Person and Virtual Events
Community Guidelines
HowTo Components – Overview
HowTo Components
HowTo Components – howto-checkbox
HowTo Components – howto-tabs
HowTo Components – howto-tooltip
Using AVIF to compress images on your site
Serving desktop-sized images to mobile devices can use 2–4x more data than needed. Instead of a "one-size-fits-all" approach to images, serve different image sizes to different devices.
Use conic gradients to create a cool border
Constructable Stylesheets
Constructable Stylesheets provide a seamless way to create and distribute styles to documents or shadow roots without worrying about FOUC.
Control focus with tabindex
When building custom interactive components, use tabindex to ensure that they're keyboard accessible.
Make your website "cross-origin isolated" using COOP and COEP
Learn how to set up the opt-in-based isolated environment, called cross-origin isolated, with COOP and COEP.
Creative list styling
A look at some useful and creative ways to style a list.
Critical Rendering Path
Optimizing the critical rendering path refers to prioritizing the display of content that relates to the current user action.
Defragment cross-domain logins
Learn how to use architectural standards and solutions (such as metadata, cross-origin iframes, identity federation, and subdomain consolidation) to resolve cross-domain identity fragmentation and deliver a seamless user journey.
A guide to enable cross-origin isolation
Cross-origin isolation enables a web page to use powerful features such as SharedArrayBuffer. This article explains how to enable cross-origin isolation on your website.
Custom metrics
Custom metrics let you measure and optimize aspects of your site's experience that are unique to your site.
Working with Custom Elements
How to provide your own in-app install experience
Use the beforeinstallprompt event to provide a custom, seamless, in-app install experience for your users.
Breaking down barriers using the DataTransfer API
The DataTransfer object holds data that is being dragged during a drag and drop operation. It may hold one or more data items, each of one or more data types.
Debug layout shifts
Learn how to identify and fix layout shifts.
Debug media playback errors on the web
Learn how to debug media playback errors on the web.
Deep dive into top web developer pain points
A collection of insights on the top pain points, collected from a number of one to one conversations with web developers.
How to define your install strategy
Best practices for combining different installation offerings to increase installation rates and avoid platform competition and cannibalization.
Designcember Calculator
A skeuomorphic attempt at recreating a solar calculator on the web that makes use of the ambient light sensor and the window controls overlay feature.
Web Developer Satisfaction
Web Developer Satisfaction is a Google project to gather information about the needs of web developers. The goal is a more reliable, predictable and interoperable web platform, enabling developers to invest in and trust it, and adopt and use new features to grow the platform and their business.
Device Orientation & Motion
Device motion and orientation events provide access to the built-in accelerometer, gyroscope, and compass in mobile devices.
Pixel-perfect rendering with devicePixelContentBox
Since Chrome 84, ResizeObserver supports a new box measurement called device-pixel-content-box, that measures the element's dimension in physical pixels. This is crucial for rendering pixel-perfect graphics, especially in the context of high-density screens.
Accessing hardware devices on the web
This article helps Web developers pick the right hardware API based on a given device.
Disable mouse acceleration to provide a better FPS gaming experience
Web apps can now disable mouse acceleration when capturing pointer events.
Jumping the hurdles with the Gamepad API
Drawing to canvas in Emscripten
Learn how to render 2D graphics to a canvas on the web from WebAssembly with Emscripten.
How Progressive Web Apps can drive business success
Build a solid business case for your PWA. Learn when you should invest, and how you can measure its success.
Easy high DPI images
Emscripten’s embind
Emscripten’s embind
Introduction to Encrypted Media Extensions
Empowering payment apps with Web Payments
Web Payments aims to provide frictionless payment experience on the web. Learn how it works, its benefits, and get ready to integrate your payment app with Web Payments.
Emscripten and npm
How do you integrate WebAssembly into this setup? In this article we are going to work this out with C/C++ and Emscripten as an example.
Emscripting a C library to Wasm
Emscripting a C library to Wasm
Enable HTTPS on your servers
Enabling HTTPS on your servers is critical to securing your webpages.
ES modules in service workers
Service workers can use static imports of ES modules to bring in extra code, as an alternative to importScripts().
Data-binding revolutions with Object.observe()
Stream updates with server-sent events
Excalidraw and Fugu: Improving Core User Journeys
A write-up of Thomas Steiner's Google I/O 2021 talk titled Excalidraw and Fugu: Improving Core User Journeys
FAQ for hacked sites
This page brings together answers to the questions about hacking we at Google hear most often.
Farewell to HTML5Rocks
So long HTML5Rocks, it's been nice knowing you.
First Contentful Paint (FCP)
This post introduces the First Contentful Paint (FCP) metric and explains how to measure it
Implement error handling when using the Fetch API
Catching errors when working with the Fetch API.
Protect your resources from web attacks with Fetch Metadata
Fetch Metadata is a new web platform feature designed to allow servers to protect themselves from cross-origin attacks.
First Input Delay (FID)
This post introduces the First Input Delay (FID) metric and explains how to measure it
Find slow interactions in the field
Before you can reproduce slow interactions in the lab to optimize your website's Interaction to Next Paint, you'll need to lean on field data to find them. Learn how to do just that in this guide.
Fix the cloaked keywords and links hack
This guide is created specifically for a type of hack that adds keyword-heavy gibberish pages to your site.
Fix the gibberish hack
This guide is created specifically for a type of hack that adds keyword-heavy gibberish pages to your site.
Fix the Japanese keyword hack
This guide is for a type of hack that creates autogenerated Japanese text on your site.
Fixing layout instability
A walkthrough of using WebPageTest to identify and fix layout instability issues.
Fixing mixed content
Find out how to fix mixed content errors on your website, in order to protect users and ensure that all of your content loads.
Making Fullscreen Experiences
Going fullscreen.
Play the Chrome dino game with your gamepad
Learn to control web games with the Gamepad API.
Finding courage and inspiration in the developer community
Web Google Developers Experts on how mentoring programs empowered them to become leaders.