How do I force a space after first character as user types. I just need only one space after first character (no spaces allowed before first one). After first character and space there can be upto 40 characters.
I found this so far, but does not fit my needs
$('.singleSpace').keyup(function() {
var foo = $(this).val().split(" ").join(""); // remove hyphens
if (foo.length > 0) {
foo = foo.match(new RegExp('.{1}', 'g')).join(" ");
}
$(this).val(foo);
});
I don't know why you want to do this but to remove spaces you can use this :
var str = $(this).val().replace(" ", "");
And for add a space after first character :
var str = $(this).replace("^(.)(.*)$", "$1 $2");
Do you need the regex?
$('.singleSpace').keyup(function() {
var $el = $(this);
var val = $el.val();
if (val.length === 1) {
$el.val(val + ' ');
}
});
You can use this code :
$('.singleSpace').keyup(function() {
var foo = $(this).val().replace(/^( *)([^ ] *)(.*)/g, function(_,b,c,d){
return $.trim(c) + ' ' + d.replace(/ /g, '').slice(0,40);
})
$(this).val(foo)
});
The only problem is the cursor position. If you type while the cursor is not at the end, the cursor will always return the the end.
See for yourself : http://jsfiddle.net/S3gJL/2/
I would suggest you tu put that function in a blur event instead, but that can be annoying aswell.
Your request is not simple at all. There is a lot of variation, users can copy paste, select and delete. It is hard to prevent everything.
The code provided above block a lot of detour (only thing that doesn't block is the right-click paste and maybe other things i'm not think of), but with the cost stated above. You might wanna search for a plugin or hire someone to develop a good system.
Remove the authorisation to write space after the first one.
For the cursor position here the fix :
$('.singleSpace').keyup(function() {
var foo = this.value.replace(/^( *)([^ ] *)(.*)/g, function(a,b,c,d,e){
return $.trim(c) + ' ' + d.replace(/ /g, '').slice(0,40);
})
var carretPos = doGetCaretPosition(this)
carretPos += foo.length - this.value.length
this.value = foo;
setSelectionRange(this, carretPos, carretPos)
});
//Code taken from
// http://stackoverflow.com/questions/17858174/set-cursor-to-specific-position-on-specific-line-in-a-textarea
function setSelectionRange(input, selectionStart, selectionEnd) {
if (input.setSelectionRange) {
input.focus();
input.setSelectionRange(selectionStart, selectionEnd);
}
else if (input.createTextRange) {
var range = input.createTextRange();
range.collapse(true);
range.moveEnd('character', selectionEnd);
range.moveStart('character', selectionStart);
range.select();
}
}
//Code taken from
// http://stackoverflow.com/questions/2897155/get-cursor-position-in-characters-within-a-text-input-field
function doGetCaretPosition (oField) {
// Initialize
var iCaretPos = 0;
// IE Support
if (document.selection) {
// Set focus on the element
oField.focus ();
// To get cursor position, get empty selection range
var oSel = document.selection.createRange ();
// Move selection start to 0 position
oSel.moveStart ('character', -oField.value.length);
// The caret position is selection length
iCaretPos = oSel.text.length;
}
// Firefox support
else if (oField.selectionStart || oField.selectionStart == '0')
iCaretPos = oField.selectionStart;
// Return results
return (iCaretPos);
}
The var is done to deal with the cursor position
var val="";
$('.singleSpace').keyup(function() {
var ele = $(this)[0];
var foo = ele.value;
if(val==foo){return false}
var startPos = ele.selectionStart;
var endPos = ele.selectionEnd;
if(event.keyCode==8){
var diff=endPos-startPos;
startPos-=diff;
endPos-=diff;
}
foo = foo.replace(new RegExp('( )','g'),'');
foo = foo.replace(new RegExp('^ *(.) *(.*?)'),'$1 $2');
val=foo;
ele.value=foo;
ele.selectionStart=startPos;
ele.selectionEnd=endPos;
});
This is the regExp you want: *(.) *(.*?) and you want to use .replace not match
