如何在javascript中获取中间字符

Question

I just want to Get hello in Label1

<script type="text/javascript">   
     result = "helloworld"         
     document.getElementById('<%= Label1.ClientID %>').innerHTML = result;
</script>

Answer 1

have you tried doing result.substring(0,5);

<script type="text/javascript">   
 result = "helloworld"         
 document.getElementById('<%= Label1.ClientID %>').innerHTML = result.substring(0,5);
</script>

Answer 2

With result.slice(start, end) you can cut the string. For "HelloWorld" that would look like
result.slice(0, 5) .

If you want to cut until the half of the string just do
result.slice(0, floor(result.length/2)) .

Source: https://www.w3schools.com/jsref/jsref_slice_string.asp

Answer 3

I don't know about your label reference, but setting HTML with document.getElementById("mylabel").innerHTML = result; does the trick. Best try with a straight forward label like ("mylabel") for testing.