Evan
0904ad76d1
## Problem
Enabling **Starting Gold** (or **Game Timer** / **Gold Multiplier**) in
the single-player / host-lobby modal made the page spend several ms of
"Render" time **every frame** — for as long as the toggle stayed
enabled. Disabling the option made it stop.
## Root cause
Each `toggle-input-card`, on enable, auto-focused and selected its
number input so you could type immediately:
```ts
input.focus();
input.select();
```
A focused/selected editable inside the modal keeps the browser doing
layout/paint work every frame for as long as it stays focused. It
reproduces for any of the toggle-input cards because they all auto-focus
on enable, which is why Starting Gold, Game Timer, and Gold Multiplier
all triggered it.
> **Note on the earlier revision of this PR:** the first attempt passed
`{ preventScroll: true }` to `focus()`, on the theory that
scroll-into-view was the cause. It successfully stopped the scroll
(verified: modal scroll container `scrollTop 0 → 0`), but the per-frame
render cost remained. That ruled out scroll-into-view and proved the
focused editable itself — not the scroll — was the trigger.
## Fix
Remove the auto-focus entirely. Enabling a toggle no longer focuses its
number input, and the per-frame render cost is gone.
## Trade-off
You no longer get type-to-replace on enable — click the field before
typing the value. Worth it to eliminate the per-frame render.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
OpenFront.io is an online real-time strategy game focused on territorial control and alliance building. Players compete to expand their territory, build structures, and form strategic alliances in various maps based on real-world geography.
This is a fork/rewrite of WarFront.io. Credit to https://github.com/WarFrontIO.
License
OpenFront source code is licensed under the GNU Affero General Public License v3.0
Current copyright notices appear in:
- Footer: "© OpenFront and Contributors"
- Loading screen: "© OpenFront and Contributors"
Modified versions must preserve these notices in reasonably visible locations.
See the LICENSE for complete requirements.
For asset licensing, see LICENSE-ASSETS.
For license history, see LICENSING.md.
🌟 Features
- Real-time Strategy Gameplay: Expand your territory and engage in strategic battles
- Alliance System: Form alliances with other players for mutual defense
- Multiple Maps: Play across various geographical regions including Europe, Asia, Africa, and more
- Resource Management: Balance your expansion with defensive capabilities
- Cross-platform: Play in any modern web browser
📋 Prerequisites
- npm (v10.9.2 or higher)
- A modern web browser (Chrome, Firefox, Edge, etc.)
🚀 Installation
-
Clone the repository
git clone https://github.com/openfrontio/OpenFrontIO.git cd OpenFrontIO -
Install dependencies
npm run instDo NOT use
npm installnornpm ibut instead use ournpm run inst. It runs the safernpm ci --ignore-scriptsto install dependencies exactly according to the versions inpackage-lock.jsonand doesn't run scripts. This can prevent being hit by a supply chain attack.
🎮 Running the Game
Development Mode
Run both the client and server in development mode with live reloading:
npm run dev
This will:
- Start the webpack dev server for the client
- Launch the game server with development settings
- Open the game in your default browser (to disable this behavior, set
SKIP_BROWSER_OPEN=truein your environment)
Client Only
To run just the client with hot reloading:
npm run start:client
Server Only
To run just the server with development settings:
npm run start:server-dev
Connecting to staging or production backends
Sometimes it's useful to connect to production servers when replaying a game, testing user profiles, purchases, or login flow.
To replay a production game, make sure you're on the same commit that the game you want to replay was executed on, you can find the
gitCommitvalue viahttps://api.openfront.io/game/[gameId]. Unfinished games cannot be replayed on localhost.
To connect to staging api servers:
npm run dev:staging
To connect to production api servers:
npm run dev:prod
🛠️ Development Tools
-
Format code:
npm run format -
Lint code:
npm run lint -
Lint and fix code:
npm run lint:fix -
Testing
npm test
🏗️ Project Structure
/src/client- Frontend game client/src/core- Deterministic game simulation/src/server- Backend game server/resources- Static assets (images, maps, etc.)
🤝 Contributing
Contributions and translations are welcome! See CONTRIBUTING.md for the workflow, the approved-issue process, project governance, and translation info.