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<html><body><h1>JavaScript Strings</h1><h2>The includes() Method</h2><p>includes() returns true if a string contains a specified string.</p><p>Find "world":</p><p id="demo"></p><p>includes() is not supported in Internet Explorer.</p><script>let text = "Hello world, welcome to the universe.";let result = text.includes("world");document.getElementById("demo").innerHTML = result;</script></body></html>