How to run javascript in text documents

How to run JavaScript in text documents

JavaScript is a commonly used web development language, which can be used to enhance the dynamics and interactivity of websites. Generally, we can embed JavaScript code directly in HTML files. However, in some cases, we can also save JavaScript code in a text document and run it. This article will introduce how to run JavaScript text documents.

1. Create a JavaScript text document

First, we need to create a new text document and name it with the ".js" suffix. For example, we can create a new text document named "example.js".

2. Write JavaScript code

Next, we need to write JavaScript code in the text document. For example, we can add the following code to a text document:

var name = prompt("Please enter your name:");
alert("Hello, " + name + "!");

This code prompts the user to enter their name and displays a popup window to the user with a greeting "Hello, [name]!" . Here, [name] represents the name entered by the user.

3. Reference JavaScript text document

Another way to run a JavaScript text document is to reference it in the HTML file of the web page. First, we add the following code to the HTML file:

<script type="text/javascript" src="example.js"></script>

This code will tell the browser to load the JavaScript code from the external file "example.js" when the web page loads.

4. Run JavaScript text document

With the above two steps, we can click on the HTML file to run the file in the browser and automatically execute what we write in the JavaScript text document code. In this example, when the web page loads, a prompt box will automatically pop up, asking the user to enter a name, and then displaying a greeting to the user.

5. Summary

This article introduces how to run JavaScript text documents. We can achieve this by creating a text document with the suffix ".js", writing JavaScript code, referencing the document in the HTML file, and running the document. We can use this method to reuse JavaScript code and make it common in multiple web pages, thus improving the reusability and maintainability of the code.

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