Observables are objects which have properties that can be observed. That means when the value of such property changes, an event is fired by the observable and the change can be reflected in other pieces of the code that listen to that event.
Observables are common building blocks of the CKEditor 5 Framework. They are particularly popular in the UI, the View class and its subclasses benefiting from the observable interface the most: it is the templates bound to the observables what makes the user interface dynamic and interactive.
Some of the basic classes like Editor or Command are observables too. Any class can become observable; all you need to do is mix the ObservableMixin into it:.
Observables are useful when it comes to managing the state of the application, which can be dynamic and, more often than not, centralized and shared between components of the application. One observable can also propagate its state or its part to another using property bindings.
Observables can also decorate their methods which makes it possible to control their execution using event listeners, giving external code some control over their behavior. Having mixed the ObservableMixin into your class, you can define observable properties. To do that, use the set method. Note that because Button extends the View class which is already observableyou do not need to mix the ObservableMixin.
Knowing that, making properties observable can be as simple as:. Each time the label property changes, the view fires the change:label event containing information about its state in the past and the new value. The change:isEnabled and change:isOn events will be fired for changes of isEnabled and isOnrespectively. The events fired by the view are used to update the DOM and make the component dynamic. You can learn more about the UI of the editor and template system in the dedicated guide.
Because labelisOnand isEnabled are observables, any change will be immediately reflected in DOM:.How to setup TinyMCE - TinyMCE #01
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How can I listen to the "input" event in ckeditor5? I would like to be able to use Observables like this:. But I don't find the name of the event that would be fired as soon as data changed in the editor. I tried "change" but it only fires when the editor get or lost focus.
What you probably need is the Document change:data event fired by editor's document. This event is fired when the document changes in such a way which is "visible" in the editor data. There's also a group of changes, like selection position changes, marker changes which do not affect the result of editor.
To listen to all these changes, you can use a wider Document change event:. What you probably need is a change event fired by editor's document. Fired after each enqueueChange block or the outermost change block was executed and the document was changed during that block's execution.
If, however, you only want to be notified about structure changes, then check whether the differ contains any changes:.
First of all, I see you are using Observable. It uses custom events and custom observables which are something different than observable you want to use. Second, 'input' is not an event but a command. If you want to listen in this command execution you can do:. However, this is a very fresh API, which will be introduced in the next version of ckeditor-core 0. Learn more.
Asked 2 years, 9 months ago. Active 1 year, 8 months ago. Viewed 6k times. I would like to be able to use Observables like this: Observable. Reinmar Active Oldest Votes. Since CKEditor5 v To listen to all these changes, you can use a wider Document change event: editor. The changes which this event will cover include: document structure changes, selection changes, marker changes.
If you want to be notified about all these changes, then simply listen to this event like this: model. Listening the "change" event on "document" instead of "editing.
Just FYI, v5 is nothing like v4 in terms of data storage and manipulation. We completely decoupled the view in short editor. Documentation and samples will arrive soon.This guide introduces the main pillars of the CKEditor 5 architecture.
This should help you go through the next steps. It consists of some core classes and interfaces that glue everything together. The main purpose of the core editor architecture is to lay the groundwork for implementing editor features. Therefore, it introduces concepts such as plugins and commands which simplify and standardize the way of implementing features. It is the biggest and by far the most complex piece of the framework, implementing the custom data model, the view layer, conversion mechanisms, the rendering engine responsible for taming contentEditable and a lot more.
Furthermore, it introduces basic UI components to be used by editor features. Quick start. Creating a simple plugin. Development tools. Core editor architecture. Editing engine. Implementing a block widget. Implementing an inline widget. Using a React component in a widget. Custom upload adapter. Advanced concepts.
Extending editor output. Preserving custom content. User interface.
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Theme customization. Third—party UI. Document editor. Creating custom editor. Development environment. Testing environment. Git commit message convention. Browser compatibility. License and legal. Getting support.Before you get to work, you should check out the Quick start guide first to set up the framework and building tools. CKEditor plugins need to implement the PluginInterface. The easiest way to do that is to inherit from the base Plugin class.
However, you can also write simple constructor functions. This guide uses the former method. Submitting the URL will result in inserting the image into the content and selecting it.
We recommend using the official CKEditor 5 inspector for development and debugging. It will give you tons of useful information about the state of the editor such as internal data structures, selection, commands, and many more. It was omitted in this guide because it is unnecessary for a simple plugin like this one. Now, open the app.
Usually, when implementing more complex features you will want to split the code into multiple files modules. However, to make this guide simpler the entire code will be kept in app. Save the file and run webpack. Refresh the page in your browser remember about the cache and… you should not see any changes. This is correct! Change this now:. Running webpack with the -w option will start it in the watch mode.
This means that webpack will watch your files for changes and rebuild the application every time you save them. And add your new plugin to the config. It was said that your InsertImage plugin relies on the image feature represented here by the Image plugin. You could add the Image plugin as a dependency of the InsertImage plugin. This would make the editor initialize Image automatically before initializing InsertImageso you would be able to remove Image from config.
However, this means that your plugin would be coupled with the Image plugin. This is unnecessary — they do not need to know about each other.
And while it does not change anything in this simple example, it is a good practice to keep plugins as decoupled as possible. Rebuild the application and refresh the page. You should see a new button in the toolbar.
Clicking the button should open a prompt window asking you for the image URL. The image is fully functional. This is all handled by the CKEditor 5 engine.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again.
If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. A set of ready-to-use rich text editors created with a powerful framework. Made with real-time collaborative editing in mind. CKEditor 5 is distributed as several ready-to-use rich text editor builds which you can install from npm. You can also customize the existing builds or build your own editors and features by using the CKEditor 5 Framework.
CKEditor 5 Builds are a set of ready-to-use rich text editors. Every "build" provides a single type of editor with a set of features and a default configuration. Load the classic editor build you can choose between CDNnpm and zip downloads :. Call the ClassicEditor. To find out how to start with other builds check the Quick start guide in the CKEditor 5 documentation. CKEditor 5 Builds allow you to quickly and easily initialize one of the many types of editors in your application.
At the same time, CKEditor 5 is also a framework for creating custom-made rich text editing solutions. To find out how to start building your own editor from scratch go to CKEditor 5 Framework overview section of CKEditor 5 documentation.
To find out more see the following CKEditor 5 documentation sections:. The documentation is far from being complete and will be constantly evolving as will the editor until it is ready for v1. For a high-level overview of the project see the CKEditor Ecosystem website.
This is the best place for bringing opinions and contributions. Letting the core team know if they are going in the right or wrong direction is great feedback and will be much appreciated! CKEditor 5 is a modular, multi-package, multi-repository project. It consists of several packages that create the editing framework, based on which the feature packages are implemented.
The ckeditor5 repository is the place that centralizes the development of CKEditor 5. It bundles different packages into a single place, adding the necessary helper tools for the development workflow, like the builder and the test runner.
Basic information on how to set up the development environment can be found in the documentation. See the official contributors' guide to learn how to contribute your code to the project.
Each repository handles its issues independently. However, it is recommended to report issues in this repository unless you know to which specific repository the issue belongs. Read more on the Support page. Skip to content.
Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Powerful rich text editor framework with a modular architecture, modern integrations and features like collaborative editing.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
Already on GitHub? Sign in to your account. We have log. Such situation could be handled: a plugin or integration could report the error or reinitialize the editor.
To do it, it needs to know that the error occurred. This is why these methods should fire event. The problem is, on what object they should fire that event. The third parameter should be passed with the contextobject on which event should be fired. On the other hand, we do not want to hide the error: it should be thrown anyway from the catch block, so there will be the stack trace in the console.
To let users handle the error we should add try-catch block in places we know that error can occur for instance document. Another problem is that document knows nothing about the editorso we need to propagate the event: editor can listen on the document and propagate error event. We want to give nice, human-friendly feedback, for developers who are integrating the editor or creating plugins, as soon as they do something wrong.
In most cases CKEditorError is a good choice for them. If there is an error they want to know about it as soon as possible. There is more than just information about the critical exception.
Sometimes you need to be able to follow the application flow. Sometimes part of it. However, this information is still only important for developers. They want to be able to disable it for end users. End-users want to have a stable application. That's it. For them, we might have some mechanism which will restart the editor in the case of a crash, but the error message is usually not important for them.
They need a watchdog mechanism which will listen on global errors and restart the editor in case of an error, not just an error in the console. They should replace all log.
Some warning we have now are also in fact errors and should be replaced by CKEditorError. If something critical happens we should inform the developer about it as soon as possible. To be able to restart the editor by the watchdog, CKEditorError needs a context to be able to identify which editor crashed. The context might be the editor instance, but also any custom object available in the editor, for instance model.
Note that engine and a big part of the UI classes do not have a reference to the editor class, so we can not force the editor as the context. Additionally CKEditorError should work well with promises. We need to figure out how to do it. We might need to wrap it in the setTimeout 0 if there is no other option. I believe that by default some warnings should be enabled like rendering infinite loop warning or UI rect-source-not-in-dom :.The CKEditor 5 Framework is made of several npm packages.
To install it you need:. Besides Node. They are needed to bundle the source code. This guide assumes that you are familiar with npm and your project uses npm already. If not, see the npm documentation or call npm init in an empty directory and keep your fingers crossed. You can now install some of the CKEditor 5 Framework packages which will allow you to initialize a simple rich-text editor.
You can start with the classic editor with a small set of features. This guide is using the ES6 modules syntax.
If you are not familiar with it, check out this article. Note that in this guide the editor class is used directly i. No editor builds are used because adding new plugins to them requires rebuilding them anyway.
This can be done by customizing a build or by including CKEditor 5 source into your application like in this guide. You can now run webpack to build the application. To do that, call the webpack executable:. You can also install webpack-cli globally using npm install -g and run it via a globally available webpack. Alternatively, you can add it as an npm script :.
Use webpack --mode production if you want to build a minified and optimized application. See more in the webpack documentation. Note: Prior to version 1. Note: CKEditor 5 Builds use Terser instead of uglifyjs-webpack-plugin because the later one seems to be unsupported anymore. Make sure to check the browser console in case anything seems wrong. We recommend using the official CKEditor 5 inspector for development and debugging.
It will give you tons of useful information about the state of the editor such as internal data structures, selection, commands, and many more. If you finished this guide, you should definitely check out the Creating a simple plugin guide that will teach you some basics of developing features in the CKEditor 5 ecosystem.
Quick start. Creating a simple plugin. Development tools. Core editor architecture. Editing engine. Implementing a block widget. Implementing an inline widget. Using a React component in a widget.
Custom upload adapter. Advanced concepts.