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56 lines
2.7 KiB
Markdown
56 lines
2.7 KiB
Markdown
# Debugging mobile plugins
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## Running on web
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Plugins can be installed from `.jpl` files in the [web build](https://app.joplincloud.com/) of the mobile app. This can help with mobile plugin development in a few ways:
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- Eliminates the need to transfer the plugin's built `.jpl` file to an Android device after every change.
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- It may be easier to inspect running plugins from a browser's development tools.
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To install a custom plugin on web,
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1. Build your plugin (run `npm run dist` from the plugin's directory).
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2. Open [web build](https://app.joplincloud.com/) of Joplin mobile.
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3. Go to "Configuration" > "Plugins" > "Enable plugin support" > "Advanced".
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4. Click "Install from file".
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5. Navigate to the base directory of your plugin.
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6. Open the `publish/` folder.
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7. Select the `.jpl` file.
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Your plugin should now be loaded!
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:::note
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If you encounter an "incompatible with Joplin mobile" error, be sure that `"platforms": ["mobile", "desktop"]` is included in your plugin's `manifest.json` ([documentation](./plugin_manifest.md)).
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:::
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After loading, plugins are run in an `<iframe>` with an `about:srcdoc` URL. To view the plugin's console output and interact with global plugin variables (e.g. `joplin.commands`),
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1. Open your browser's development tools.
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- On most desktop browsers, this can be done by pressing <kbd>F12</kbd>.
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- The following steps were tested on Firefox, Chrome, and Safari desktop.
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2. Click on the "Console" tab.
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3. To run JavaScript in the context of your plugin, [select its JavaScript context](https://developer.chrome.com/docs/devtools/console/reference#context).
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- The JavaScript context will be named `about:srcdoc`.
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- If using Chrome's DevTools, the [`debug`](https://developer.chrome.com/docs/devtools/console/utilities#debug-function) and other console utility function may be helpful.
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## Android: Inspecting a WebView
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On mobile, all plugins run in `iframe`s within a `WebView`.
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On Android, it's possible to inspect this `WebView` with Google Chrome's development tools. To do this,
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1. Enable plugin WebView debugging. To do this, go to "Configuration" > "Plugins" > "Advanced settings" and enable "Plugin webview debugging".
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2. Restart Joplin.
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3. Follow the [Chrome devtools instructions for debugging Android devices](https://developer.chrome.com/docs/devtools/remote-debugging/).
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## Getting console output from Joplin's logs
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By default, messages logged with `console.info`, `console.warn`, and `console.error` are added to Joplin's logs. To view these logs,
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1. Open Joplin's log screen (Configuration > Tools > Logs).
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2. Click "Search".
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3. A search box labeled "filter" should be available. Enter your plugin's ID (or a large part of it).
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If Joplin is running in development mode, messages logged with `console.log` are also added to Joplin's logs.
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