如何使用javascript或jquery删除/删除单词的第一个空格？

Question

I want to remove first space from text field. i have created function which allow only characters. Here is my html code :

<form:input path="deliveryBoyName" id="deliveryBoyName"
        maxlength="100" class="form-control" 
       onkeypress="return onlyAlphabets(event,this);">
</form:input>

Here is my javascript function : function onlyAlphabets(e, t) {

try {
    if (window.event) {
        var charCode = window.event.keyCode;
    }
    else if (e) {
        var charCode = e.which;
    }
    else { return true; }
    if (charCode == 0 || charCode == 8 || charCode == 17 || charCode == 20 || charCode == 32 || (charCode > 64 && charCode < 91) || (charCode > 96 && charCode < 123))
        return true;
    else
        return false;
}
catch (err) {
    alert(err.Description);
} }

Now if user first types space then it should remove. starts only from character.

For example : 
If user types like " Hello World" 
Then it should not allowed. 
If user type like "Hello World" then its should allowed. please help me.    
Thank you in advance.

Answer 1

JavaScript trim() function can remove white spaces from both the side.

Here is working fiddle -

 var str = " Did you find solution Ashish? If yes then tick it."; alert(str.trim()); 

Answer 2

I think you want to allow space only when it is not the first character.

This is what you want, ie your function removing all the unnecessary code:

function onlyAlphabets(e, t) {
  var charCode = e ? e.which : window.event.keyCode;

  return (charCode == 0  || charCode == 8  || charCode == 17 || charCode == 20 ||
          (t.value.length && charCode == 32) || 
          (charCode > 64 && charCode < 91) || 
          (charCode > 96 && charCode < 123))
}