# Editor.js API


Blocks have access to the public methods provided by Editor.js API Module. Plugin and Tune Developers
can use Editor\`s API as they want.

## Api object description

Common API interface.

```js
export interface API {
   blocks: IBlocksAPI;
   caret: ICaretAPI;
   sanitizer: ISanitizerAPI;
   toolbar: IToolbarAPI;
   // ...
 }
 ```

#### BlocksAPI

Methods that working with Blocks

`swap(fromIndex, toIndex)` - swaps two Blocks by their positions

`delete(blockIndex?: Number)` - deletes Block with passed index

`getCurrentBlockIndex()` - current Block index

`getBlockByIndex(index: Number)` - returns Block with passed index

`getBlocksCount()` - returns Blocks count

`stretchBlock(index: number, status: boolean)` - make Block stretched

`insertNewBlock()` - insert new Block after working place

#### SanitizerAPI

`clean(taintString, config)` - method uses HTMLJanitor to clean taint string.

Editor.js provides basic config without attributes, but you can inherit by passing your own config.

If Tool enables inline-tools, we get it's sanitizing rules and merge with your passed custom rules.

Usage:

```js
let taintString = '<div><p style="font-size: 5em;"><b></b>BlockWithText<a onclick="void(0)"></div>'
let customConfig = {
  b: true,
  p: {
    style: true,
  },
}
this.api.sanitizer.clean(taintString, customConfig);
```

### ToolbarAPI

Methods that working with Toolbar

`open()` - opens toolbar

`close()` - closes toolbar, toolbox and blockSettings if they are opened

### EventsAPI

Methods that allows to subscribe on Editor.js events

`on(eventName: string, callback: Function)` - subscribe callback on event

`off(eventName: string, callback: Function)` - unsubscribe callback from event

`emit(eventName: string, data: object)` - fires all subscribed callbacks with passed data

### ListenerAPI

Methods that allows to work with DOM listener. Useful when you forgot to remove listener. Module collects all listeners and destroys automatically

`on(element: HTMLElement, eventType: string, handler: Function, useCapture?: boolean)` - add event listener to HTML element

`off(element: HTMLElement, eventType: string, handler: Function)` - remove event handler from HTML element


### CaretAPI

Methods to manage caret position.

Each method accept `position` and `offset` parameters. `Offset` should be used to shift caret by passed amount of characters.

`Position` can be one of the following values:

| Value     | Description 
| --------- | ----------- 
| `start`   | Caret will be set at the Block's beginning
| `end`     | Caret will be set at the Block end
| `default` | More or less emulates browser behaviour, in most cases behaves as `start`  

Each method returns `boolean` value: true if caret is set successfully or false otherwise (e.g. when there is no Block at index);

`setToFirstBlock(position?: 'end'|'start'|'default', offset?: number): boolean;` — set caret to the first Block

`setToLastBlock(position?: 'end'|'start'|'default', offset?: number): boolean;` — set caret to the last Block

`setToNextBlock(position?: 'end'|'start'|'default', offset?: number): boolean;` — set caret to the next Block

`setToPreviousBlock(position?: 'end'|'start'|'default', offset?: number): boolean;` — set caret to the previous Block

`setToBlock(index: number, position?: 'end'|'start'|'default', offset?: number): boolean;` — set caret to the Block by passed `index`

### NotifierAPI

If you need to show any messages for success or failure events you can use notifications module.

Call on target Editor:

```javascript
let editor = new EditorJS({
  onReady: () => {
    editor.notifier.show({
      message: 'Editor is ready!'
    });
  },
});
```

In Tool's class:

```javascript
this.api.notifier.show({
  message: 'Cannot upload image. Wrong mime-type.',
  style: 'error',
});
```

![](https://capella.pics/14fcdbe4-d6eb-41d4-b66e-e0e86ccf1a4b.jpg)


Check out [`codex-notifier` package page](https://github.com/codex-team/js-notifier) on GitHub to find docs, params and examples. 

### Destroy API

If there are necessity to remove Editor.js instance from the page you can use `destroy()` method.

It makes following steps:

1. Clear the holder element by setting it\`s innerHTML to empty string

2. Remove all event listeners related to Editor.js

3. Delete all properties from instance object and set it\`s prototype to `null`

After executing the `destroy` method, editor inctance becomes an empty object. This way you will free occupied JS Heap on your page.