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<html><body><h1>JavaScript Validation API</h1><p>Enter a number and click OK:</p><input id="id1" type="number" min="100"><button onclick="myFunction()">OK</button><p>If the number is less than 100 (the input's min attribute), an error message will be displayed.</p><p id="demo"></p><script>function myFunction() { let text; if (document.getElementById("id1").validity.rangeUnderflow) { text = "Value too small"; } else { text = "Input OK"; } document.getElementById("demo").innerHTML = text;}</script></body></html>