JavaScript check if input is between two int or float then display or not display content

The problem may happen when input contain comma , so "0,5" >= 0.5 will return false and parseFloat("0,5") will return 0.

You need replace , with .

Answer:1

Something like below will work.

<input type="text" id="myTextField" onblur="change()"/>
<input type="submit" id="byBtn" value="" />

JavaScript

function change() {
        var myTextbox = document.getElementById('myTextField').value;
        var button = document.getElementById('byBtn');
        if (parseFloat(myTextbox) >= 0.5 && parseFloat(myTextbox) <= 8) {
            button.value = "OK";
        } else {
            button.value = "";
        }
    }
Answer:2

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