electron/docs/tutorial/planned-breaking-changes.md

# Planned Breaking API Changes

The following list includes the APIs that will be removed in Electron 2.0.

There is no timetable for when this release will occur but deprecation
warnings will be added at least 90 days beforehand.

## `app`

```js
// Deprecated
app.getAppMemoryInfo()
// Replace with
app.getAppMetrics()
```

## `BrowserWindow`

```js
// Deprecated
let optionsA = {webPreferences: {blinkFeatures: ''}}
let windowA = new BrowserWindow(optionsA)
// Replace with
let optionsB = {webPreferences: {enableBlinkFeatures: ''}}
let windowB = new BrowserWindow(optionsB)
```


```js
// Deprecated
let optionsA = {titleBarStyle: 'hidden-inset'}
let windowA = new BrowserWindow(optionsA)
// Replace with
let optionsB = {titleBarStyle: 'hiddenInset'}
let windowB = new BrowserWindow(optionsB)
```

## `clipboard`

```js
// Deprecated
clipboard.readRtf()
// Replace with
clipboard.readRTF()

// Deprecated
clipboard.writeRtf()
// Replace with
clipboard.writeRTF()

// Deprecated
clipboard.readHtml()
// Replace with
clipboard.readHTML()

// Deprecated
clipboard.writeHtml()
// Replace with
clipboard.writeHTML()
```

## `crashReporter`

```js
// Deprecated
crashReporter.start({
  companyName: 'Crashly',
  submitURL: 'https://crash.server.com',
  autoSubmit: true
})
// Replace with
crashReporter.start({
  companyName: 'Crashly',
  submitURL: 'https://crash.server.com',
  uploadToServer: true
})
```

## `menu`

```js
// Deprecated
menu.popup(browserWindow, 100, 200, 2)
// Replace with
menu.popup(browserWindow, {x: 100, y: 200, positioningItem: 2})
```

## `nativeImage`

```js
// Deprecated
nativeImage.toPng()
// Replace with
nativeImage.toPNG()

// Deprecated
nativeImage.toJpeg()
// Replace with
nativeImage.toJPEG()

// Deprecated
nativeImage.createFromBuffer(buffer, 1.0)
// Replace with
nativeImage.createFromBuffer(buffer, {
  scaleFactor: 1.0
})
```

## `process`

```js
// Deprecated
process.versions['atom-shell']
// Replace with
process.versions.electron
```

* `process.versions.electron` and `process.version.chrome` will be made
  read-only properties for consistency with the other `process.versions`
  properties set by Node.

## `session`

```js
// Deprecated
ses.setCertificateVerifyProc(function (hostname, certificate, callback) {
  callback(true)
})
// Replace with
ses.setCertificateVerifyProc(function (request, callback) {
  callback(0)
})
```

## `Tray`

```js
// Deprecated
tray.setHighlightMode(true)
// Replace with
tray.setHighlightMode('on')

// Deprecated
tray.setHighlightMode(false)
// Replace with
tray.setHighlightMode('off')
```

## `webContents`

```js
// Deprecated
webContents.openDevTools({detach: true})
// Replace with
webContents.openDevTools({mode: 'detach'})
```

```js
// Deprecated
webContents.setZoomLevelLimits(1, 2)
// Replace with
webContents.setVisualZoomLevelLimits(1, 2)
```

## `webFrame`

```js
// Deprecated
webFrame.setZoomLevelLimits(1, 2)
// Replace with
webFrame.setVisualZoomLevelLimits(1, 2)

// Deprecated
webFrame.registerURLSchemeAsSecure('app')
// Replace with
protocol.registerStandardSchemes(['app'], {secure: true})

// Deprecated
webFrame.registerURLSchemeAsPrivileged('app', {secure: true})
// Replace with
protocol.registerStandardSchemes(['app'], {secure: true})
```

## `<webview>`

```js
// Deprecated
webview.setZoomLevelLimits(1, 2)
// Replace with
webview.setVisualZoomLevelLimits(1, 2)
```

## Node Headers URL

This is the URL specified as `disturl` in a `.npmrc` file or as the `--dist-url`
command line flag when building native Node modules.

Deprecated: https://atom.io/download/atom-shell

Replace with: https://atom.io/download/electron

## Duplicate ARM Assets

Each Electron release includes two identical ARM builds with slightly different 
filenames, like `electron-v1.7.3-linux-arm.zip` and 
`electron-v1.7.3-linux-armv7l.zip`. The asset with the `v7l` prefix was added 
to clarify to users which ARM version it supports, and to disambiguate it from 
future armv6l and arm64 assets that may be produced.

The file _without the prefix_ is still being published to avoid breaking any 
setups that may be consuming it. Starting at 2.0, the un-prefixed file will 
no longer be published.

For details, see
[6986](https://github.com/electron/electron/pull/6986)
and 
[7189](https://github.com/electron/electron/pull/7189).


## `FIXME` comments

The `FIXME` string is used in code comments to denote things that should be 
fixed for the 2.0 release. See 
https://github.com/electron/electron/search?q=fixme