JavaScript is one of the most widely used programming languages for building interactive and responsive websites. Since it runs natively in browsers, developers can easily write, test, and debug code without extra software or compilation.
Overview
1. Run JavaScript in the Browser Console
- Open Developer Tools (F12 or Ctrl + Shift + I on Windows, Cmd + Option + I on Mac).
- Navigate to the Console tab.
- Type code like:
console.log(“Hello, World!”); - Press Enter to execute.
2. Embed JavaScript in an HTML File
- Add a <script> tag inside your HTML file.
- Example:
<script>
alert(“Hello, World!”);
</script>
- Open the file in a browser, and the script runs automatically.
3. Run JavaScript in Microsoft Edge
- Open Edge → Press F12 or right-click → Inspect.
- Go to Console tab.
- Enter code:
alert(“Hello from Edge!”); - Hit Enter to run.
4. Run JavaScript in Google Chrome
- Open Chrome → Press Ctrl + Shift + I (Windows) / Cmd + Option + I (Mac).
- Select Console.
- Type:
console.log(“Hello from Chrome!”); - Press Enter.
5. Run JavaScript in Apple Safari
- Enable Develop menu: Preferences → Advanced → Check “Show Develop menu in menu bar.”
- Open console with Option + Cmd + C.
- Type:
console.log(“Hello from Safari!”); - Press Enter.
This guide explains how to run JavaScript code in different browsers and test it across real devices using BrowserStack.
How to Run JavaScript Code in a Browser
You can run JavaScript code in your browser’s console or by embedding it within an HTML file using the <script> tag.
Here are two common ways to execute JavaScript code:
1. Using the Browser Console
Every modern browser has built-in developer tools that allow you to write and run JavaScript code directly in the console.
Example:
console.log("Hello, World!");2. Embedding JavaScript in an HTML File
JavaScript can also be embedded within an HTML file using the <script> tag. This is useful when you want the code to execute as part of a webpage.
Example:
<script>
alert("Hello, World!");
</script>This code will display a pop-up message (an alert) when the HTML file is loaded in the browser.
General Steps to Run JavaScript Code in a Browser
Below are steps to run JavaScript Code in Browsers:
1. Open your browser’s developer tools ( F12 or Ctrl + Shift + I).
2. Navigate to the Console tab.
3. Type your JavaScript code and press Enter to execute it.
Steps to Run JavaScript Code in Microsoft Edge Browser
Below are the steps to run JavaScript Code in Microsoft Edge browser:
1. Open Microsoft Edge and press F12 or right-click anywhere on the webpage and select Inspect.
2. Click on the Console tab.
3. Type your JavaScript code in the console, such as:
alert("Hello from Microsoft Edge!");4. Press Enter to run the code.
Steps to Run JavaScript Code in Google Chrome Browser
Below are the steps to run JavaScript Code in Google Chrome browser:
1. Open Google Chrome and press Ctrl + Shift + I (Windows) or Cmd + Option + I (Mac) to open Developer Tools.
2. Select the Console tab from the top menu.
3. Enter your JavaScript code, such as:
console.log("Hello from Google Chrome!");4. Press Enter to execute the code.
Learn More: How to Run JavaScript in Chrome Browser
Steps to Run JavaScript Code in Apple Safari Browser
Below are the steps to run JavaScript Code in Apple Safari browser
1. Open Safari and enable the Develop menu by going to Preferences > Advanced and checking Show Develop menu in menu bar.
2. Press Option + Cmd + C to open the console.
3. Enter your JavaScript code, such as:
console.log("Hello from Safari!");4. Press Enter to run the code.
Developers and QAs can check their websites for cross-browser compatibility using BrowserStack.
BrowserStack enables developers or QAs to instantly test their websites across a range of real devices and browsers, such as Chrome, Safari, IE, Edge, and Firefox.
Featured Article
