Angular-Markdown-Editor


In this package we will use a few libraries and tools to make a more convenient "all in one" WYSIWYG Markdown Editor with preview. All of that with a simple Angular Component. This can be useful for online documentation and many other reasons (docs, blog, ...).

#### AngularJS (previous version)
If you still have AngularJS project, you can still get the older version 1.1.5 from NPM, however please note that support has stopped and only the new version 2.x will be supported.

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Here is the list of dependencies, which are required
- Bootstrap-Markdown (editor) itself
- jQuery _(required for Bootstrap-Markdown editor)_
- Bootstrap 3.x.
- If anyone needs Bootstrap 4 support and has time to add the necessary code, PR (Pull Request) are certainly welcome.

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It's a "nice to have" but not a deep dependencies, which is the ngx-markdown lib. It is used in the demo of this lib, but technically you could plug any other lib you wish for dealing with the markdown preview.

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- Bootstrap 3 demo / examples repo

Installation

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Angular-Markdown-Editor on NPM

Install through NPM or Yarn
``bash
npm install angular-markdown-editor

or with Yarn


yarn add angular-markdown-editor
`

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You need to add CSS Styles for the Bootstrap, Markdown Editor and Font-Awesome (the latter is optional).

`json
"styles": [
"../node_modules/bootstrap/dist/css/bootstrap.css",
"../node_modules/bootstrap-markdown/css/bootstrap-markdown.min.css",
"../node_modules/font-awesome/css/font-awesome.css"
],
"scripts": [
"../node_modules/jquery/dist/jquery.js",
"../node_modules/bootstrap-markdown/js/bootstrap-markdown.js"
],
`

#### When using ngx-markdown and/or Prism.js
Prism.js uses separate javascript file for each language, so you'll need to add them yourself.
For example, below we are adding the highlight for C#, JavaScript and TypeScript:
`json
"styles": [
"../node_modules/prismjs/themes/prism.css"
],
"scripts": [
"../node_modules/prismjs/prism.js",
"../node_modules/prismjs/components/prism-css.min.js",
"../node_modules/prismjs/components/prism-javascript.min.js",
"../node_modules/prismjs/components/prism-typescript.min.js"
],
`

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`typescript
import { AngularMarkdownEditorModule } from 'angular-markdown-editor';

@NgModule({
declarations: [],
imports: [AngularMarkdownEditorModule]

// or pre-define global configuration using the forRoot
// imports: [AngularMarkdownEditorModule.forRoot({ iconlibrary: 'fa' })]
});
`

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You can pass the following input attribute:

| attribute | type | required | comments |
| ------------- | ------------- | -------- | ------- |
| textareaId | string | yes | id of the textarea DOM element used by the lib |
| rows | number | no | number of rows for the textarea, defaults to 10 |
| options | mixed | no | markdown Editor Options to pass to the element |
| locale | EditorLocale | no | locale set that has a language and dictionary that can be added as an alternative language. Can be 1 or more dictionaries |

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The library comes with it's own Global Editor Options, these propertoes can be overriden at any by the options attribute. Click to see the Global Options defined.

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You can hook to any of the Bootstrap Markdown Editor Events through 2 ways, just choose the one you prefer:

#### 1. Dispatch of Custom Event
Each of the events are available in the View from a Custom Event as (onX)="doSomething()", for example:
`html
textareaId="editor1" rows="12"
name="markdownText" [(ngModel)]="markdownText"
(onFullscreenExit)="hidePreview()">

`
`typescript
export class MyComponent {
hidePreview() { console.log(e.getContent()); }
}
`

You can also pass the Event returned by the Editor via $event.detail.eventData

`html
textareaId="editor1" rows="12"
name="markdownText" [(ngModel)]="markdownText"
(onChange)="onChange($event.detail.eventData)">

`
`typescript
export class MyComponent {
ngOnInit() {
onChange(e) { console.log(e.getContent()); }
}
}
`

#### 2. Editor Option Callbacks
The second way is to use the callback directly when defining the Editor Options.
`html
textareaId="editor1" rows="12"
name="markdownText" [(ngModel)]="markdownText"
[options]="editorOptions">

`
`typescript
import { EditorOption } from 'angular-markdown-editor';
export class MyComponent {
ngOnInit() {
this.editorOptions: EditorOption = {
iconlibrary: 'fa',
onChange: (e) => console.log(e.getContent()),
onFullscreenExit: () => this.hidePreview()
};
}
}
`

#### List of Event Hooks
- onPreview
- onPreviewEnd
- onSave
- onBlur
- onFocus
- onFullscreen
- onFullscreenExit
- onChange
- onSelect
- onShow

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The editor API is quite dense and I will not list the entire set of methods, but you can see the entire list from the Editor Method Interface.
To call any of the Editor Methods, you will have to first get a reference to the Editor's instance which you can get from the onShow callback.

Get the Editor's instance through the onShow, via the Custom Event (from the View) or Editor Option callback (just choose the one you prefer). Below shows how to get it through the latter option.

###### View
`html
Show Full Screen
textareaId="editor1" rows="12"
name="markdownText" [(ngModel)]="markdownText"
[options]="editorOptions">

`

###### Component
`typescript
import { EditorInstance, EditorOption } from 'angular-markdown-editor';
export class MyComponent {
bsEditorInstance: EditorInstance;

ngOnInit() {
this.editorOptions = {
iconlibrary: 'fa',
onShow: (e) => this.bsEditorInstance = e
};
}

showFullScreen() {
this.bsEditorInstance.setFullscreen(true);
}
}
`

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For the "Preview" button to work, you will need to provide a parser to the Editor Options. This lib has no deep dependencies to any Markdown Parser (you could use marked.js or any other parser). But assuming we are using ngx-markdown, we can add the parser this way:

###### Component
`typescript
import { MarkdownService } from 'ngx-markdown';

export class TestComponent implements OnInit {
constructor(private markdownService: MarkdownService) {}

ngOnInit() {
this.editorOptions = {
parser: (val) => this.markdownService.compile(val.trim())
};
}
}
`

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I really thought that some buttons were missing to go a great job (~~Strikethrough~~ & Table). So I added them directly in the Global Options. If you want to add your own, then just look at how it was done in the Global Options and read the section additionalButtons of Bootstrap Markdown website.

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You can add a locale to the editor but passing a locale object (and bind it in the View) which contain a language and the dictionary of words used by the editor. The entire list of words can be seen in the example below. So for example, if we want to add French locale, we will do the following (you can see demo code):

###### View
`html
Show Full Screen
textareaId="editor1" rows="12"
name="markdownText" [(ngModel)]="markdownText"
[locale]="locale"
[options]="editorOptions">

`

###### Component
`typescript
import { EditorInstance, EditorLocale, EditorOption } from 'angular-markdown-editor';
export class MyComponent {
locale: EditorLocale = {
language: 'fr',
dictionary: {
'Bold': 'Gras',
'Italic': 'Italique',
'Heading': 'Titre',
'URL/Link': 'Insérer un lien HTTP',
'Image': 'Insérer une image',
'List': 'Liste à puces',
'Ordered List': 'Liste ordonnée',
'Unordered List': 'Liste non-ordonnée',
'Code': 'Code',
'Quote': 'Citation',
'Preview': 'Prévisualiser',
'Strikethrough': 'Caractères barrés',
'Table': 'Table',
'strong text': 'texte important',
'emphasized text': 'texte souligné',
'heading text': 'texte d\'entête',
'enter link description here': 'entrez la description du lien ici',
'Insert Hyperlink': 'Insérez le lien hypertexte',
'enter image description here': 'entrez la description de l\'image ici',
'Insert Image Hyperlink': 'Insérez le lien hypertexte de l\'image',
'enter image title here': 'entrez le titre de l\'image ici',
'list text here': 'texte à puce ici'
}
};

// if you want to pass multiple locales, just pass it as an array
/*
locale: EditorLocale[] = [
{ language: 'fr', dictionary: { 'Bold': 'Gras', ...
{ language: 'en', dictionary: { 'Bold': 'Bold', ...
];
*/

ngOnInit() {
this.editorOptions = {
language: 'fr', // also set the language option to French
onShow: (e) => this.bsEditorInstance = e
};
}
}
`

Note I could not find a way to change the language dynamically, so it seems that we would have to destroy the component and re-create it for switching the language/locale.

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MIT License

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