Pre-built Release

Download a pre-built modernGraphTool release and host the entire dist/ folder on your own server. This gives you full control over when and which version runs, at the cost of manual updates.

Overview

A pre-built release is a self-contained static site. You unzip it, drop your config and data in, and upload the whole folder to your web server. There’s no runtime dependency on jsDelivr, no version-detection magic, and no auto-updates — you control exactly what users see.

When to pick this

Good fit for:

• Controlled update cadence (you decide when a new version ships)
• Airgapped, intranet, or otherwise jsDelivr-unreachable environments

Bad fit for:

• Operators who don’t want to re-upload files on every release

Installation

1. Download the latest release zip.
2. Extract the zip. The extracted folder is a complete site — everything you need to deploy.
3. Customize the configuration files:
   • config.js — application settings (see Customizing the Page)
   • theme.css — graph color theme (see Customizing Page Styles)
   • data/ — measurement data and target curves (see Managing Data)
4. Upload the entire folder to your web server via FTP or any file-transfer method. That’s it — open the page in a browser and verify it loads.

Folder structure

After extracting the release, you’ll see something like this:

dist/                     # (or extracted release folder)
├── config.js             # Application settings — YOU EDIT
├── theme.css             # Graph color theme — YOU EDIT
├── index.html            # HTML entry point — editable for metadata
├── .htaccess             # Apache SPA fallback
├── data/
│   ├── phones/           # Measurement data files (.txt) — YOU EDIT
│   ├── target/           # Target curve data files (.txt) — YOU EDIT
│   ├── phone_book.json   # Device list definition — YOU EDIT
│   ├── Bounds U.txt      # Preference Bound upper (optional) — YOU EDIT
│   └── Bounds D.txt      # Preference Bound lower (optional) — YOU EDIT
├── assets/               # Images, strings, etc. — YOU EDIT
└── _app/                 # Built application bundle — DO NOT EDIT

Files marked YOU EDIT are safe to customize. The _app/ folder contains the built application and should be left alone — it’s overwritten on every release update.

Updating the app

Pre-built releases need manual updates. The safe procedure:

1. Back up your current deployment. Keep a copy of config.js, theme.css, data/, assets/, and any customized index.html.
2. Download the new release from the releases page and extract it.
3. Copy your customized files back in:
   • config.js
   • theme.css
   • data/ (entire folder — phones, targets, phone_book.json, bounds)
   • assets/ (entire folder)
   • index.html — only if you’ve customized it (OG tags, analytics, etc.). Otherwise use the new release’s index.html so you pick up any upstream improvements.
4. Upload the merged folder to your server, overwriting the old deployment.
5. Check the changelog for any config schema changes that need your attention.

Don’t overwrite your data

The most common update mistake is extracting the new release directly over your live deployment. This overwrites config.js, data/, etc. with the default release templates. Always back up or copy out first.

Troubleshooting

Data doesn’t appear in the device selector

Cause: PATH configuration in config.js doesn’t match your actual folder layout, or phone_book.json is missing / malformed.

Fix: Verify the paths in PATH (PHONE_MEASUREMENT, TARGET_MEASUREMENT, PHONE_BOOK) point at real files. Open the browser’s network tab and check which request is 404ing. See Managing Data for the expected layout.

Site works locally but not on the server

Cause: Case sensitivity. Windows and macOS filesystems are case-insensitive by default; most Linux web servers are not. A file named Harman IE 2019v2.txt on disk won’t match a request for harman ie 2019v2.txt.

Fix: Match your filenames exactly to the phone_book.json entries, including case.

Preference Bound doesn’t render

Cause: Bounds U.txt and Bounds D.txt aren’t in data/.

Fix: Place both files directly in data/ (not in a subfolder). See the Preference Bound feature doc for the file format.