JavaScript is a widely used programming language that can be written in a variety of environments. In this article, we will cover where JavaScript is written and how to use it.
1. JavaScript in the browser
The browser is one of the most common environments where JavaScript is used. Almost all browsers support JavaScript, and they all have JavaScript interpreters built into the browser. You can use JavaScript in your browser to write dynamic web pages, change the style and content of web pages, and communicate with the server.
There are many ways to write JavaScript in the browser. You can use the
In this example, we define a function called "sayHello" and add it to the page A button that, when clicked, triggers the function and prints "Hello, world!" to the console. In this code, JavaScript code is embedded in the HTML file.
In addition to embedding JavaScript code in the page, you can also save the JavaScript code to an external file and call them in the page using the
