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<!DOCTYPE html> <html> <body> <h1>JavaScript Numbers</h1> <h2>The isSafeInteger() Method</h2> <p>The isSafeInteger() method returns true if the argument is a safe integer.</p> <p>Otherwise it returns false.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = Number.isSafeInteger(10) + "<br>" + Number.isSafeInteger(12345678901234567890); </script> </body> </html>
