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<!DOCTYPE html> <html> <head> <title>Let's Coding Example</title> </head> <body> <div id="html-div"> </div> <script> let text = "Hello, world!"; console.log(text.indexOf("world")); // Outputs: 7 console.log(text.includes("Hello")); // Outputs: true console.log(text.replace("world", "Universe")); // Hello, Universe! </script> </body> </html>
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