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How to write javascript code with vs

PHPz

Release： 2023-04-25 14:51:20

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In modern web development, JavaScript (JS) has become one of the irreplaceable tools. It is an interpreted programming language that is extensible to take full advantage of the browser's front-end performance. As a web developer, using VS to write JavaScript is a great way to take advantage of integrations with other technologies.

This article will use Visual Studio (VS) 2019 Community version to write detailed steps for JavaScript, and demonstrate it with a simple example.

Install VS

First, you need to download and install VS 2019 Community. You can download the latest version from the official website (https://visualstudio.microsoft.com/downloads/) or from the Visual Studio launcher. During the installation process, you can choose to install the components you need, including those suitable for web development.

New JavaScript Project

When selecting "New Project", select the "JavaScript" option and select a "Web" project as the template. Here, you can choose from ASP.NET Core applications, Angular applications, React applications, Vue.js applications, etc. In this article, I will use a "blank web application" as an example.

Add JavaScript files

In the new project, you can see the "Flat Folder", right-click it and select "New Item". In the Add New Item dialog box, select the JavaScript File option and name it "example.js". Your JavaScript file should now show up in the project structure, making it available in the HTML file.

Writing JavaScript Code

Now, you can start writing JavaScript code. In the "example.js" file, add the following code:

function playGame() {
alert("Let's play a game!");
}

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When this code is executed, a message box will pop up containing the "Let's play a game!" prompt.

Embed JavaScript code

To use JavaScript code in a web page, create an HTML file. Right-click on the flat folder in your project, select "Add Item", then select "Web Page" and name it "index.html".

Add the following code to the HTML file you just created:

<!doctype html>
<html>
<head>
    <meta charset="utf-8" />
    <title>JavaScript Example</title>
    <script type="text/javascript" src="example.js"></script>
</head>
<body>
    <button onclick="playGame()">Play</button>
</body>
</html>

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This example uses the JavaScript file created in the previous step and adds it to the HTML page. It also contains a page that contains a "Play" button that, when clicked, calls the "playGame" JavaScript function and displays a warning message.

Run the JavaScript application

Now, save the code and open the “index.html” file in your browser. Click the "Play" button and a message box should pop up with warning text.

The example in this article is simple, but you can extend this application and build more complex JavaScript applications using VS, use other JavaScript frameworks and see real-time changes in the browser (for example, in a React application using "Hot Module Replacement").

Writing JavaScript in VS integrates your code and other web development technologies in one place, making your workflow smoother and more efficient. So, start writing JavaScript with VS and enjoy the fun and joy of programming!

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