Image Tool
Image Block for the Editor.js.
Features
- Uploading file from the device
- Pasting copied content from the web
- Pasting images by drag-n-drop
- Pasting files and screenshots from Clipboard
- Allows to add border, background
- Allows to stretch image to the container's full-width
Note This Tool requires server-side implementation for file uploading. See backend response format for more details.
Installation
Install via NPM
Get the package
npm i --save-dev @editorjs/image
Include module at your application
import ImageTool from '@editorjs/image';
Other methods
Manual downloading and connecting
- Upload folder
dist
from repository - Add
dist/bundle.js
file to your page.
Loading from CDN
You can load specific version of package from jsDelivr CDN.
https://cdn.jsdelivr.net/npm/@editorjs/image@2.3.0
Then require this script on page with Editor.js through the <script src=""></script>
tag.
Usage
Add a new Tool to the tools
property of the Editor.js initial config.
import ImageTool from '@editorjs/image';
// or if you inject ImageTool via standalone script
const ImageTool = window.ImageTool;
var editor = EditorJS({
...
tools: {
...
image: {
class: ImageTool,
config: {
endpoints: {
byFile: 'http://localhost:8008/uploadFile', // Your backend file uploader endpoint
byUrl: 'http://localhost:8008/fetchUrl', // Your endpoint that provides uploading by Url
}
}
}
}
...
});
Config Params
Image Tool supports these configuration parameters:
Field | Type | Description |
---|---|---|
endpoints | {byFile: string, byUrl: string} |
Endpoints for file uploading. Contains 2 fields: byFile - for file uploading byUrl - for uploading by URL |
field | string |
(default: image ) Name of uploaded image field in POST request |
types | string |
(default: image/* ) Mime-types of files that can be accepted with file selection. |
additionalRequestData | object |
Object with any data you want to send with uploading requests |
additionalRequestHeaders | object |
Object with any custom headers which will be added to request. See example |
captionPlaceholder | string |
(default: Caption ) Placeholder for Caption input |
buttonContent | string |
Allows to override HTML content of «Select file» button |
uploader | {{uploadByFile: function, uploadByUrl: function}} |
Optional custom uploading methods. See details below. |
Note that if you don't implement your custom uploader methods, the endpoints
param is required.
Tool's settings
-
Add border
-
Stretch to full-width
-
Add background
Output data
This Tool returns data
with following format
Field | Type | Description |
---|---|---|
file | object |
Uploaded file data. Any data got from backend uploader. Always contain the url property |
caption | string |
image's caption |
withBorder | boolean |
add border to image |
withBackground | boolean |
need to add background |
stretched | boolean |
stretch image to screen's width |
{
"type" : "image",
"data" : {
"file": {
"url" : "https://www.tesla.com/tesla_theme/assets/img/_vehicle_redesign/roadster_and_semi/roadster/hero.jpg"
},
"caption" : "Roadster // tesla.com",
"withBorder" : false,
"withBackground" : false,
"stretched" : true
}
}
Backend response format
This Tool works by one of the following schemes:
- Uploading files from the device
- Uploading by URL (handle image-like URL's pasting)
- Uploading by drag-n-drop file
- Uploading by pasting from Clipboard
Uploading files from device
Scenario:
- User select file from the device
- Tool sends it to your backend (on
config.endpoint.byFile
route) - Your backend should save file and return file data with JSON at specified format.
- Image tool shows saved image and stores server answer
So, you can implement backend for file saving by your own way. It is a specific and trivial task depending on your environment and stack.
Response of your uploader should cover following format:
{
"success" : 1,
"file": {
"url" : "https://www.tesla.com/tesla_theme/assets/img/_vehicle_redesign/roadster_and_semi/roadster/hero.jpg",
// ... and any additional fields you want to store, such as width, height, color, extension, etc
}
}
success - uploading status. 1 for successful, 0 for failed
file - uploaded file data. Must contain an url
field with full public path to the uploaded image.
Also, can contain any additional fields you want to store. For example, width, height, id etc.
All additional fields will be saved at the file
object of output data.
Uploading by pasted URL
Scenario:
- User pastes an URL of the image file to the Editor
- Editor pass pasted string to the Image Tool
- Tool sends it to your backend (on
config.endpoint.byUrl
route) via 'url' POST-parameter - Your backend should accept URL, download and save the original file by passed URL and return file data with JSON at specified format.
- Image tool shows saved image and stores server answer
Response of your uploader should be at the same format as described at «Uploading files from device» section
Uploading by drag-n-drop or from Clipboard
Your backend will accept file as FormData object in field name, specified by config.field
(by default, «image
»).
You should save it and return the same response format as described above.
Providing custom uploading methods
As mentioned at the Config Params section, you have an ability to provide own custom uploading methods.
It is a quite simple: implement uploadByFile
and uploadByUrl
methods and pass them via uploader
config param.
Both methods must return a Promise that resolves with response in format that described at the backend response format section.
Method | Arguments | Return value | Description |
---|---|---|---|
uploadByFile | File |
{Promise.<{success, file: {url}}>} |
Upload file to the server and return an uploaded image data |
uploadByUrl | string |
{Promise.<{success, file: {url}}>} |
Send URL-string to the server, that should load image by this URL and return an uploaded image data |
Example:
import ImageTool from '@editorjs/image';
var editor = EditorJS({
...
tools: {
...
image: {
class: ImageTool,
config: {
/**
* Custom uploader
*/
uploader: {
/**
* Upload file to the server and return an uploaded image data
* @param {File} file - file selected from the device or pasted by drag-n-drop
* @return {Promise.<{success, file: {url}}>}
*/
uploadByFile(file){
// your own uploading logic here
return MyAjax.upload(file).then(() => {
return {
success: 1,
file: {
url: 'https://codex.so/upload/redactor_images/o_80beea670e49f04931ce9e3b2122ac70.jpg',
// any other image data you want to store, such as width, height, color, extension, etc
}
};
});
},
/**
* Send URL-string to the server. Backend should load image by this URL and return an uploaded image data
* @param {string} url - pasted image URL
* @return {Promise.<{success, file: {url}}>}
*/
uploadByUrl(url){
// your ajax request for uploading
return MyAjax.upload(file).then(() => {
return {
success: 1,
file: {
url: 'https://codex.so/upload/redactor_images/o_e48549d1855c7fc1807308dd14990126.jpg',,
// any other image data you want to store, such as width, height, color, extension, etc
}
}
})
}
}
}
}
}
...
});