如果javascript中的值小于另一个值，则显示div消息

Question

我想让div显示输入值是否小于1000，并且如果该值在JavaScript中实时大于或等于1000，则隐藏该div

Answer 1

 let input = document.querySelector("#number") let box = document.querySelector(".box") update = () => { let value = input.value if(parseInt(value) < 1000){ box.style.display = "none" } else { box.style.display = "block" } setTimeout(update, 1000); } update() 

 .box { height: 100px; width: 100px; background-color: lime; } 

 <input type="text" id="number" /> <div class="box"> </div> 

Answer 2

Maybe this can help:

<input type="text" id="myinput">
<button onclick="checkValue()">Enter</button>

<div id="divmsg">
</div>

<script>
    function checkValue()
    {
        var num = parseInt($("#myinput").val());
        if (num > 1000)
        {
            $("#divmsg").hide();
        }
        else
        {
            $("#divmsg").text(num);
        }
    }
</script>