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<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> </head> <body> <input id="id1" type="number" min="100"> <button type="Button" onclick="myFunction()">OK</button> <p id="demo"></p> <script> function myFunction() { var txt = ""; if (document.getElementById("id1").validity.rangeUnderflow) { txt = "Value too small"; } document.getElementById("demo").innerHTML = txt; } </script> </body> </html>
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