# dhtmlxScheduler with Angular

:::note
This tutorial shows how to use the JS DHTMLX Scheduler directly in an Angular app without the official wrapper.

If you want Angular inputs/outputs, wrapper-managed sync, and Angular template component support, use [Angular Scheduler](integrations/angular.md) instead.
:::

You should be familiar with basic Angular concepts (components, lifecycle hooks, services). If not, start with the [Angular documentation](https://angular.dev/overview).

DHTMLX Scheduler is compatible with Angular. You can check the related demo repository on GitHub: [DHTMLX Scheduler with Angular Demo](https://github.com/DHTMLX/angular-scheduler-demo).

## Creating a project

Before you start, install [Node.js](https://nodejs.org/en/) and [Angular CLI](https://angular.dev/tools/cli).

~~~bash
ng new my-angular-scheduler-app --standalone --routing=false --style=css
cd my-angular-scheduler-app
~~~

Start the app once to verify the project is working:

- npm: `npm start`
- yarn: `yarn start`
- or CLI: `ng serve`

The app should be available at `http://localhost:4200`.

![Scheduler with Angular](/img/scheduler_angular_front.png)

## Creating Scheduler

Now we should get the DHTMLX Scheduler code. Firstly, we need to stop the app by pressing **Ctrl+C** in the command line.
Then we can proceed with installing the Scheduler package.

## Step 1. Package installation

The PRO versions of the library are available for the **npm/yarn** install from our private repository, please follow 
[this instruction](guides/installation.md#npm---evaluation-and-pro-versions) to gain access to it.

After you've got the Evaluation version of the Scheduler, you can install it with the following commands:

- for npm:

~~~
npm install @dhx/trial-scheduler
~~~

- for yarn:

~~~
yarn add @dhx/trial-scheduler
~~~

Alternatively, since the zip-package of the library is structured as an **npm** module, you can 
[install it from a local folder](guides/installation.md#installing-the-package-from-a-local-folder).

## Step 2. Component creation

Now we should create a component to add a Scheduler into the application. Let's create the ***scheduler*** folder in the ***src/app/*** directory, 
add new files into it and call them ***scheduler.component.ts***, ***scheduler.component.css*** and ***scheduler.component.html***.

The newly created ***scheduler.component.html*** file inside the ***scheduler*** folder will contain the template for the scheduler. Let's add the following 
lines of code into it:


~~~html title="scheduler/scheduler.component.html"
<div #scheduler_here style="width: 100%; height:100vh"></div>
~~~

We'll declare scheduler styles in a separate file named ***scheduler.component.css***. The default styles can look like this:


~~~css title="scheduler/scheduler.component.css"
@import "@dhx/trial-scheduler/codebase/dhtmlxscheduler.css";
:host {
   display: block;
   position: relative;
   height: 100%;
   width: 100%;
}
~~~

To make the Scheduler container occupy the entire space of the body, you need to add the following styles to the ***styles.css*** file located in the ***src*** folder:


~~~css title="src/styles.css"
html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
}
~~~

### Importing source files

Open the ***scheduler.component.ts*** and ***scheduler.component.css*** files and import Scheduler source files. Note that:

- if you've installed the Scheduler package from a local folder, your import paths will look like this:


~~~js title="scheduler.component.ts"
import { Scheduler, SchedulerStatic } from 'dhtmlx-scheduler';
~~~


~~~js title="scheduler.component.css"
@import "@dhtmlx-scheduler/codebase/dhtmlxscheduler.css";
~~~

- if you've chosen to install the trial version, the import paths should be as in:


~~~js title="scheduler.component.ts"
import { Scheduler, SchedulerStatic } from '@dhx/trial-scheduler';
~~~

~~~js title="scheduler.component.css"
@import "@dhx/trial-scheduler/codebase/dhtmlxscheduler.css";
~~~

In this tutorial we will use the **trial** version of Scheduler.

### Setting the container and adding Scheduler

To display Scheduler on the page, we need to set the container to render the component inside. Use the code below:


~~~js title="scheduler.component.ts"
import { Scheduler, SchedulerStatic } from "@dhx/trial-scheduler";
import { Component, ElementRef, OnInit, OnDestroy, 
    ViewChild, ViewEncapsulation } from "@angular/core";

@Component({
  encapsulation: ViewEncapsulation.None,
  selector: "scheduler",
  styleUrls: ["./scheduler.component.css"],
  templateUrl: 'scheduler.component.html'
})

export class SchedulerComponent implements OnInit, OnDestroy {
  @ViewChild("scheduler_here", { static: true }) schedulerContainer!: ElementRef;
  private _scheduler?: SchedulerStatic;

  ngOnInit() {
    let scheduler = Scheduler.getSchedulerInstance();
    scheduler.init(
      this.schedulerContainer.nativeElement,
      new Date(2027, 9, 7),
      "week", 
    );
    this._scheduler = scheduler;
  }

  ngOnDestroy() {
    if (this._scheduler) this._scheduler.destructor();
  }
}
~~~

In the above code we've used the **ngOnInit()** method of Angular and also specified the **ngOnDestroy()** method that 
contains the [**scheduler.destructor()**](api/method/destructor.md) call to clear the component when it is no longer needed.

## Step 3. Adding Scheduler into the app

Now it's time to add the component into our app. Open ***src/app/app.ts*** and use the Scheduler Component instead of the default content by inserting
the code below:


~~~js  title="src/app/app.ts"
import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `<scheduler></scheduler>`,
})
export class App {}
~~~

After that, when we start the app by using:

```bash
ng serve
```

We should see an empty Scheduler on a page. 

![Adding Scheduler into an app](/img/scheduler_angular_init.png)

## Step 4. Providing Data

Create `src/app/demo-data.ts` with a small dataset:

```
export function getData() {
  return [
    {
      id: 1,
      start_date: new Date('2027-10-06T02:00:00Z'),
      end_date: new Date('2027-10-06T10:20:00Z'),
      text: 'Product Strategy Hike',
    },
    {
      id: 2,
      start_date: new Date('2027-10-07T12:00:00Z'),
      end_date: new Date('2027-10-07T16:00:00Z'),
      text: 'Agile Meditation and Release',
    },
    {
      id: 3,
      start_date: new Date('2027-10-07T06:00:00Z'),
      end_date: new Date('2027-10-07T11:00:00Z'),
      text: 'Tranquil Tea Time',
    },
  ];
}
```
Now import and parse the data in `Scheduler` component:

~~~ts title="src/app/scheduler/scheduler.component.ts"
import { getData } from '../demo-data';

...
let scheduler = Scheduler.getSchedulerInstance();
scheduler.init(
  this.schedulerContainer.nativeElement,
  new Date(2027, 9, 7),
  "week", 
);
scheduler.parse(getData());
this._scheduler = scheduler;

~~~

Now, if you reopen the app page, you should see a Scheduler with events.

![Scheduler with Angular events](/img/scheduler_angular_events.png)

## Step 5. Saving Data

To capture changes made in the Scheduler, you can use a [dataProcessor](https://docs.dhtmlx.com/dataprocessor__index.html) 
handler that lets you "communicate" with the server-side backend. The handler can be declared either as a function or a router object.
dhtmlxScheduler accepts Promise response from the handler, so your Scheduler will correctly process the completion of an action. 

You can create a **DataProcessor** via the **createDataProcessor()** API method and capture changes, like this:

~~~
scheduler.createDataProcessor(function(entity, action, data, id) {​
    scheduler.message(`${​entity} ${​action}`);
});
~~~

If your service changes the event id after creating a new record (which it usually does), make sure that your Promise returns an object with 
**(id: databaseId)** or **(tid: databaseId)** as a result, so that Scheduler could apply the new database id to the record.
Get [more information about the server side](guides/server-integration.md).

Well, Angular Scheduler is ready, you are welcome to [check out the full demo on GitHub](https://github.com/DHTMLX/angular-scheduler-demo).

## XSS, CSRF and SQL Injection Attacks

Pay attention that Scheduler doesn't provide any means of preventing an application from various threats, such as SQL injections or 
XSS and CSRF attacks. It is important that responsibility for keeping an application safe is on the developers implementing the backend.

Check the [Application Security](guides/app-security.md) article to learn the most vulnerable points of the component and the measures you can take to improve the safety of your application.
