electron/docs/api/web-frame.md

# webFrame

The `web-frame` module allows you to customize the rendering of the current
web page.

An example of zooming current page to 200%.

```javascript
var webFrame = require('electron').webFrame;

webFrame.setZoomFactor(2);
```

## Methods

The `web-frame` module has the following methods:

### `webFrame.setZoomFactor(factor)`

* `factor` Number - Zoom factor.

Changes the zoom factor to the specified factor. Zoom factor is
zoom percent divided by 100, so 300% = 3.0.

### `webFrame.getZoomFactor()`

Returns the current zoom factor.

### `webFrame.setZoomLevel(level)`

* `level` Number - Zoom level

Changes the zoom level to the specified level. The original size is 0 and each
increment above or below represents zooming 20% larger or smaller to default
limits of 300% and 50% of original size, respectively.

### `webFrame.getZoomLevel()`

Returns the current zoom level.

### `webFrame.setZoomLevelLimits(minimumLevel, maximumLevel)`

* `minimumLevel` Number
* `maximumLevel` Number

Sets the maximum and minimum zoom level.

### `webFrame.setSpellCheckProvider(language, autoCorrectWord, provider)`

* `language` String
* `autoCorrectWord` Boolean
* `provider` Object

Sets a provider for spell checking in input fields and text areas.

The `provider` must be an object that has a `spellCheck` method that returns
whether the word passed is correctly spelled.

An example of using [node-spellchecker][spellchecker] as provider:

```javascript
webFrame.setSpellCheckProvider("en-US", true, {
  spellCheck: function(text) {
    return !(require('spellchecker').isMisspelled(text));
  }
});
```

### `webFrame.registerURLSchemeAsSecure(scheme)`

* `scheme` String

Registers the `scheme` as secure scheme.

Secure schemes do not trigger mixed content warnings. For example, `https` and
`data` are secure schemes because they cannot be corrupted by active network
attackers.

### `webFrame.registerURLSchemeAsBypassingCSP(scheme)`

* `scheme` String

Resources will be loaded from this `scheme` regardless of the current page's
Content Security Policy.

### `webFrame.registerURLSchemeAsPrivileged(scheme)`

* `scheme` String

Registers the `scheme` as secure, bypasses content security policy for resources and
allows registering ServiceWorker.

[spellchecker]: https://github.com/atom/node-spellchecker