Nuxt.js

Prerequisites

Before you begin, ensure you have the following:

Node.js: Version 14 or higher. Download from Node.js Official Website.
npm or Yarn: Package managers that come with Node.js.
Code Editor: Such as Visual Studio Code.
Basic Knowledge: Familiarity with JavaScript, Vue.js, and Nuxt.js.
Access to TakeProfit Platform: For widget integration and testing.

Set Up Your Nuxt.js Project

Create a New Nuxt.js App Use create-nuxt-app to bootstrap a new Nuxt.js project. Open your terminal and run:
```
npx create-nuxt-app my-tp-widget
```
Follow the prompts to set up your project. For this guide, it’s recommended to select the following options:
- Choose the package manager: npm or Yarn
- Choose UI framework: None (or your preferred choice)
- Choose custom server framework: None
- Choose Nuxt.js modules: Select based on your preference (e.g., Axios, PWA)
- Choose linting tools: As per your preference
- Choose test framework: None (optional)
- Choose rendering mode: Universal (SSR / SSG)
Replace my-tp-widget with your desired project name.
Navigate to Your Project Directory
```
cd my-tp-widget
```
Start the Development Server Verify that your Nuxt.js app is set up correctly by starting the development server:
```
npm run dev
```
This will run your app at http://localhost:3000.

Install the SDK Integrate the TakeProfit Widget SDK into your Nuxt.js project by installing it via npm or Yarn:
```
npm install takeprofit-widget-sdk@0.2.3
```
Or with Yarn:
```
yarn add takeprofit-widget-sdk@0.2.3
```
Verify Installation Check your package.json to ensure takeprofit-widget-sdk is listed under dependencies:
```
"dependencies": {
  "takeprofit-widget-sdk": "^0.2.3",
  // other dependencies...
}
```

Configure Nuxt.js Headers for Security

To ensure that your widget can be embedded securely within the TakeProfit platform, you need to configure specific HTTP headers in your Nuxt.js application.

Update nuxt.config.js Open nuxt.config.js and add the following configuration to set the necessary headers:

// nuxt.config.js

export default {
	// ... existing configurations

	render: {
		compressor: false, // Disable if using a custom server
	},

	serverMiddleware: [
		{
			path: "/",
			handler: "~/server-middleware/headers.js",
		},
	],

	// Alternatively, use the `head` property for specific pages
};

Create Server Middleware for Headers Create a server middleware to set the required HTTP headers.
```
mkdir server-middleware
touch server-middleware/headers.js
```
Open server-middleware/headers.js and add the following code:
```
// server-middleware/headers.js

export default function (req, res, next) {
	res.setHeader("X-Frame-Options", "ALLOW-FROM https://takeprofit.com");
	res.setHeader(
		"Content-Security-Policy",
		"frame-ancestors 'self' https://takeprofit.com"
	);
	next();
}
```
Explanation:
- X-Frame-Options: Controls whether your site can be embedded in an iframe. Setting it to ALLOW-FROM https://takeprofit.com allows the widget to be embedded only from the specified origin.
- Content-Security-Policy: The frame-ancestors directive specifies valid parents that may embed a page using <frame>, <iframe>, <object>, <embed>, or <applet>. Setting it to 'self' https://takeprofit.com allows framing from the same origin and the specified TakeProfit domain.
Restart the Development Server After updating the configurations, restart your development server to apply the changes:
```
npm run dev
```

Initialize the SDK in Your Project

Create an SDK Initialization Plugin Nuxt.js allows you to create plugins that can run before the root Vue.js application is instantiated. We’ll create a plugin to initialize the TakeProfit Widget SDK.

mkdir plugins
touch plugins/tp-widget-sdk.js

Open plugins/tp-widget-sdk.js and add the following code:

// plugins/tp-widget-sdk.js

import { TPWidgetSDK } from "takeprofit-widget-sdk";

export default ({ app }, inject) => {
	// Initialize the SDK
	TPWidgetSDK.connect();
	TPWidgetSDK.hideLoader();

	// Inject the SDK into the context as $tpWidgetSDK
	inject("tpWidgetSDK", TPWidgetSDK);
};

Register the Plugin Open nuxt.config.js and register the plugin:
```
// nuxt.config.js

export default {
	// ... existing configurations

	plugins: [{ src: "~/plugins/tp-widget-sdk.js", mode: "client" }],

	// ... other configurations
};
```
Explanation:
- mode: 'client': Ensures that the plugin is only loaded on the client-side, as the SDK interacts with the browser environment.
- inject: Makes the SDK available throughout your application via this.$tpWidgetSDK.

Define Type Interfaces (Optional) If you’re using TypeScript, you can define necessary interfaces to enhance type safety. Create types/tp-widget-sdk.d.ts:

// types/tp-widget-sdk.d.ts

declare module "takeprofit-widget-sdk" {
	export interface ResultPayload {
		isSuccessful: boolean;
		error?: string;
	}

	export class TPWidgetSDK {
		static connect(): void;
		static hideLoader(): void;
		static disconnect(): void;
		static subscribeWidgetChange(
			callback: (newState: WidgetStateInfo | null) => void
		): void;
		static unsubscribeWidgetChange(
			callback: (newState: WidgetStateInfo | null) => void
		): void;
		static subscribeChannelChange(
			callback: (newChannel: Channel | null) => void
		): void;
		static unsubscribeChannelChange(
			callback: (newChannel: Channel | null) => void
		): void;
		static requestChangeSecurity(
			securityID: SecurityID,
			callback: (result: { payload: ResultPayload }) => void
		): void;
		static addMenuItem(
			label: string,
			action: () => void,
			isPermanent: boolean
		): Promise<number>;
		static updateMenuItem(
			menuItemId: number,
			isPermanent: boolean,
			label: string
		): Promise<boolean>;
		static removeMenuItem(menuItemId: number): Promise<boolean>;
	}

	export type SecurityID = `${string};${string}`;

	export interface WidgetStateInfo {
		widgetID: string;
		channelID: string | null;
		active: boolean;
		fullscreen: boolean;
	}

	export interface Channel {
		ID: string;
		securityID: SecurityID | null;
		security: Security | null;
	}

	export interface Security {
		ID: SecurityID;
		ticker: string;
		precision: number;
		name: string;
		exchangeCode?: string;
		iconURL?: string;
		iconBase64?: string;
		iconBackgroundColor?: string;
		className?: string;
		classNameTopLevel?: string;
		companyName?: string;
		countryCode?: string;
		exchangeAlias?: string;
		industryName?: string;
	}
}

Note: Ensure that your tsconfig.json includes the types directory:

// tsconfig.json

{
	"compilerOptions": {
		// ... existing options
		"typeRoots": ["./types", "./node_modules/@types"]
	}
	// ... other configurations
}

Create the Widget Page Using Nuxt.js’s file-based routing, create a new page for your widget at pages/widget.vue:

<!-- pages/widget.vue -->

<template>
	<div class="widget">
		<h1>TakeProfit Widget</h1>
		<p>Welcome to your first TakeProfit widget!</p>
		<button
			@click="changeSecurity('AAPL;BATS')"
			class="btn"
		>
			Set Security to AAPL
		</button>
		<button
			@click="changeSecurity('META;BATS')"
			class="btn"
		>
			Set Security to META
		</button>
		<div class="menu-actions">
			<button
				@click="addMenuItem"
				class="btn"
			>
				Add Refresh Data Menu Item
			</button>
			<button
				@click="updateMenuItem"
				class="btn"
				:disabled="!menuItemId"
			>
				Update Menu Item
			</button>
			<button
				@click="removeMenuItem"
				class="btn"
				:disabled="!menuItemId"
			>
				Remove Menu Item
			</button>
		</div>
	</div>
</template>

<script>
export default {
	data() {
		return {
			menuItemId: null,
		};
	},
	mounted() {
		// Subscribe to widget state changes
		this.$tpWidgetSDK.subscribeWidgetChange(this.handleWidgetChange);

		// Subscribe to channel state changes
		this.$tpWidgetSDK.subscribeChannelChange(this.handleChannelChange);
	},
	beforeDestroy() {
		// Unsubscribe from widget and channel changes
		this.$tpWidgetSDK.unsubscribeWidgetChange(this.handleWidgetChange);
		this.$tpWidgetSDK.unsubscribeChannelChange(this.handleChannelChange);
	},
	methods: {
		handleWidgetChange(newState) {
			console.log("Widget state updated:", newState);
		},
		handleChannelChange(newChannel) {
			console.log("Channel state updated:", newChannel);
		},
		changeSecurity(securityID) {
			this.$tpWidgetSDK.requestChangeSecurity(securityID, (result) => {
				if (result.payload.isSuccessful) {
					console.log(`Security successfully changed to ${securityID}.`);
				} else {
					console.error(
						`Failed to change security: ${result.payload.error}`
					);
				}
			});
		},
		async addMenuItem() {
			try {
				const id = await this.$tpWidgetSDK.addMenuItem(
					"Refresh Data",
					() => {
						console.log("Refresh Data menu item clicked.");
						// Implement refresh logic here
					},
					false
				);
				this.menuItemId = id;
				console.log(`Menu item added with ID: ${id}`);
			} catch (error) {
				console.error("Failed to add menu item:", error);
			}
		},
		async updateMenuItem() {
			if (!this.menuItemId) return;
			try {
				const success = await this.$tpWidgetSDK.updateMenuItem(
					this.menuItemId,
					false,
					"Refresh Data (Updated)"
				);
				if (success) {
					console.log("Menu item updated successfully.");
				}
			} catch (error) {
				console.error("Failed to update menu item:", error);
			}
		},
		async removeMenuItem() {
			if (!this.menuItemId) return;
			try {
				const success = await this.$tpWidgetSDK.removeMenuItem(
					this.menuItemId
				);
				if (success) {
					console.log("Menu item removed successfully.");
					this.menuItemId = null;
				}
			} catch (error) {
				console.error("Failed to remove menu item:", error);
			}
		},
	},
};
</script>

<style scoped>
.widget {
	padding: 20px;
	font-family: Arial, sans-serif;
	text-align: center;
}

.btn {
	margin: 10px;
	padding: 10px 20px;
	font-size: 16px;
	cursor: pointer;
	border: none;
	border-radius: 4px;
	background-color: #0070f3;
	color: #fff;
	transition: background-color 0.3s ease;
}

.btn:hover {
	background-color: #005bb5;
}

.btn:disabled {
	background-color: #cccccc;
	cursor: not-allowed;
}

.menu-actions {
	margin-top: 20px;
}
</style>

Explanation:

Data Property: menuItemId stores the ID of the added menu item.
Lifecycle Hooks:
- mounted: Subscribes to widget and channel state changes.
- beforeDestroy: Unsubscribes from widget and channel state changes to prevent memory leaks.
Methods:
- handleWidgetChange: Logs widget state updates.
- handleChannelChange: Logs channel state updates.
- changeSecurity: Requests a security change and handles the response.
- addMenuItem: Adds a new menu item labeled “Refresh Data” and stores its ID.
- updateMenuItem: Updates the existing menu item’s label to “Refresh Data (Updated)”.
- removeMenuItem: Removes the existing menu item and resets menuItemId.
Template:
- Buttons to change security and manage menu items.
- Buttons are styled and conditionally disabled based on the presence of menuItemId.
Styles: Scoped CSS for consistent styling.

Ensure Correct Routing Make sure that navigating to /widget in your Nuxt.js app renders the widget.vue page. You can test this by visiting http://localhost:3000/widget in your browser.

Handle Widget and Channel State Changes Ensure that your widget responds to state changes by implementing appropriate handlers within the widget.vue component (already demonstrated in Step 5).
Implement Additional Interactions Depending on your widget’s requirements, you can add more functionalities such as updating menu items, handling user inputs, and integrating real-time data feeds.

Enhance your widget by adding custom menu items to the widget header.

Implement Menu Item Functions in widget.vue The menu item functions are already implemented in Step 5. Here’s a recap:

Add Menu Item

async addMenuItem() {
  try {
    const id = await this.$tpWidgetSDK.addMenuItem('Refresh Data', () => {
      console.log('Refresh Data menu item clicked.')
      // Implement refresh logic here
    }, false)
    this.menuItemId = id
    console.log(`Menu item added with ID: ${id}`)
  } catch (error) {
    console.error('Failed to add menu item:', error)
  }
}

Update Menu Item

async updateMenuItem() {
  if (!this.menuItemId) return
  try {
    const success = await this.$tpWidgetSDK.updateMenuItem(this.menuItemId, false, 'Refresh Data (Updated)')
    if (success) {
      console.log('Menu item updated successfully.')
    }
  } catch (error) {
    console.error('Failed to update menu item:', error)
  }
}

Remove Menu Item

async removeMenuItem() {
  if (!this.menuItemId) return
  try {
    const success = await this.$tpWidgetSDK.removeMenuItem(this.menuItemId)
    if (success) {
      console.log('Menu item removed successfully.')
      this.menuItemId = null
    }
  } catch (error) {
    console.error('Failed to remove menu item:', error)
  }
}

Explanation:

Add Menu Item: Adds a new menu item labeled “Refresh Data” to the widget header. Upon successful addition, stores the menuItemId and enables the update and remove buttons.
Update Menu Item: Updates the existing menu item’s label to “Refresh Data (Updated)”.
Remove Menu Item: Removes the menu item using the stored menuItemId and disables the update and remove buttons.

Ensure Unique Menu Item IDs When adding multiple menu items, ensure each has a unique menuItemId to prevent conflicts. In this example, we’re managing a single menu item, but you can extend this logic to handle multiple items as needed.

Start the Development Server Ensure your Nuxt.js app is running:
```
npm run dev
```
The app will be available at http://localhost:3000.
Configure Local Storage for Testing To simulate the widget’s presence on the TakeProfit platform, configure local storage in your browser:
- Open the TakeProfit Platform: Navigate to the TakeProfit platform in your browser.
- Open Developer Console: Press F12 or Ctrl+Shift+I to open the developer tools.
- Set Local Storage Entry:
  localStorage.setItem( "takeprofit.integrations.third_party_widget_options", JSON.stringify([ { iframeUrl: "http://localhost:3000/widget", // Your widget's URL enableChannelSupport: false, // Set to true if your widget supports channels title: "Nuxt.js Widget", imageUrl: "https://example.com/icon.png", // Replace with your widget icon URL }, ]) );
  Note:
  - Replace 'http://localhost:3000/widget' with your actual widget URL if different.
  - Provide a valid imageUrl for the widget icon.
Reload the TakeProfit Platform Refresh the TakeProfit platform page. Your Nuxt.js widget should now appear in the widget panel, allowing you to add it to the dashboard and interact with its functionalities.
Verify Functionality
- Security Change: Click on the “Set Security” buttons and observe the console logs for successful changes.
- Menu Items: Add the “Refresh Data” menu item and click it to see the corresponding console log. Test updating and removing the menu item to ensure they function as expected.

Once testing is successful, deploy your widget to a live environment.

Choose a Hosting Service Select a hosting service that can serve Nuxt.js applications and supports custom HTTP headers. Some popular options include:
- Vercel
- Netlify
- AWS Amplify
- Heroku
Prepare Your Files for Deployment Ensure all your files (pages/widget.vue, plugins/tp-widget-sdk.js, server-middleware/headers.js, etc.) are correctly set up and that your server configuration (server-middleware/headers.js) is compatible with your hosting service.
Deploy to Vercel (Example) Here’s how to deploy your widget to Vercel with the necessary headers:
- Install Vercel CLI
  npm install -g vercel
- Deploy Run the deployment command and follow the prompts:
  vercel
  Vercel will automatically detect your Nuxt.js project and handle the build process.
Configure Headers on Vercel Vercel allows you to define custom headers using the vercel.json configuration file.
- Create vercel.json
  touch vercel.json
- Add Header Configuration
  // vercel.json { "routes": [ { "src": "/(.*)", "headers": { "X-Frame-Options": "ALLOW-FROM https://takeprofit.com", "Content-Security-Policy": "frame-ancestors 'self' https://takeprofit.com" }, "dest": "/$1" } ] }
  Explanation:
  - src: Matches all routes.
  - headers: Sets the required security headers.
  - dest: Serves the matched route.
- Deploy with Vercel Deploy again to apply the new configuration:
  vercel --prod

Update Local Storage Configuration After deployment, update the iframeUrl in the TakeProfit platform’s local storage to point to your deployed widget’s URL:

localStorage.setItem(
	"takeprofit.integrations.third_party_widget_options",
	JSON.stringify([
		{
			iframeUrl: "https://yourdomain.com/widget", // Your deployed widget's URL
			enableChannelSupport: false,
			title: "Nuxt.js Widget",
			imageUrl: "https://yourdomain.com/icon.png", // Your widget's icon URL
		},
	])
);

Final Testing Reload the TakeProfit platform and verify that your deployed widget functions correctly in the live environment. Test all functionalities, including security changes and menu item interactions, to ensure seamless integration.

Best Practices

Secure Communication: Always serve your widget over HTTPS to ensure secure communication with the TakeProfit platform.
Unique Identifiers: Ensure that requestId and menuItemId are unique to prevent conflicts.

Subscription Management: Always unsubscribe from state changes when they’re no longer needed to prevent memory leaks.

mounted() {
  this.$tpWidgetSDK.subscribeWidgetChange(this.handleWidgetChange)
  this.$tpWidgetSDK.subscribeChannelChange(this.handleChannelChange)
},
beforeDestroy() {
  this.$tpWidgetSDK.unsubscribeWidgetChange(this.handleWidgetChange)
  this.$tpWidgetSDK.unsubscribeChannelChange(this.handleChannelChange)
},

Error Handling: Implement robust error handling for all asynchronous operations to enhance user experience.

async addMenuItem() {
  try {
    const id = await this.$tpWidgetSDK.addMenuItem('Refresh Data', () => {
      console.log('Refresh Data menu item clicked.')
      // Implement refresh logic here
    }, false)
    this.menuItemId = id
    console.log(`Menu item added with ID: ${id}`)
  } catch (error) {
    console.error('Failed to add menu item:', error)
  }
}

Performance Optimization: Limit the number of active subscriptions and avoid unnecessary state updates to maintain optimal performance.
Code Documentation: Keep your code well-documented to facilitate maintenance and future enhancements.
Responsive Design: Ensure your widget is responsive and functions seamlessly across different devices and screen sizes.

Next Steps

Congratulations! You’ve successfully created and integrated your first widget using Nuxt.js and the TakeProfit Widget SDK (version 0.2.3). To further enhance your widget, consider the following:

Explore Advanced SDK Features: Refer to the SDK Reference to utilize all available methods and message types.
Implement Real-Time Data: Integrate real-time data feeds to provide dynamic and up-to-date information within your widget.
Customize the UI: Enhance the user interface with additional Vue components and styling to improve user engagement.
Add More Interactions: Implement more interactive features like custom events, notifications, and user preferences.
Optimize: Ensure your widget is responsive and functions seamlessly across different devices and screen sizes.
Security Enhancements: Implement additional security measures to safeguard data and ensure secure communication.

For comprehensive details, refer to the SDK Reference and other documentation resources provided by the TakeProfit Widget SDK.

Troubleshooting

If you encounter issues while setting up or using the TakeProfit Widget SDK, consider the following solutions:

SDK Not Connecting
- Check Origins: Ensure that your widget’s domain is allowed and matches the trusted origins (takeprofit.com).
- Network Issues: Verify that there are no network restrictions or firewall rules blocking communication.
Menu Items Not Appearing
- Local Storage Configuration: Double-check the iframeUrl and ensure it points to the correct widget URL.
- SDK Initialization: Ensure that TPWidgetSDK.connect() and TPWidgetSDK.hideLoader() are called successfully.
Security Change Fails
- Valid Security ID: Ensure that the securityID you are requesting is valid and recognized by the platform.
- Error Handling: Check the console for error messages to understand why the request failed.
Unhandled Promise Rejections
- Implement .catch Blocks: Ensure that all asynchronous SDK methods have proper error handling using .catch to manage rejected promises.
Performance Issues
- Optimize Subscriptions: Limit the number of active subscriptions and avoid unnecessary state updates.
- Efficient Rendering: Ensure that your Vue components are optimized to prevent unnecessary re-renders.

For persistent issues, refer to the Support and Resources section or contact the support team for assistance.

Additional Resources

Installation Guide: Detailed instructions for installing the SDK.
SDK Reference: Comprehensive documentation of all available methods, interfaces, and message types.
Creating Your First Widget: A practical guide to building and testing a basic widget.
Nuxt.js Documentation: Official Nuxt.js documentation for deeper understanding.
Vue.js Documentation: Official Vue.js documentation for building user interfaces.
JavaScript Documentation: Official JavaScript documentation for deeper understanding.
Content Security Policy (CSP) Documentation: Learn more about CSP for enhancing security.
HTTP Headers Documentation: Understand various HTTP headers for better configuration.

Getting Started

Guides

Reference

Prerequisites

Set Up Your Nuxt.js Project

Install the TakeProfit Widget SDK

Configure Nuxt.js Headers for Security

Initialize the SDK in Your Project

Create Your First Widget Page

Manage Widget State and Interactions

Add Menu Items

Test Your Widget Locally

Deploy Your Widget

Best Practices

Next Steps

Troubleshooting

Additional Resources

Getting Started

Guides

Reference

​Prerequisites

​Set Up Your Nuxt.js Project

​Install the TakeProfit Widget SDK

​Configure Nuxt.js Headers for Security

​Initialize the SDK in Your Project

​Create Your First Widget Page

​Manage Widget State and Interactions

​Add Menu Items

​Test Your Widget Locally

​Deploy Your Widget

​Best Practices

​Next Steps

​Troubleshooting

​Additional Resources

Prerequisites

Set Up Your Nuxt.js Project

Install the TakeProfit Widget SDK

Configure Nuxt.js Headers for Security

Initialize the SDK in Your Project

Create Your First Widget Page

Manage Widget State and Interactions

Add Menu Items

Test Your Widget Locally

Deploy Your Widget

Best Practices

Next Steps

Troubleshooting

Additional Resources