in in Input field, if the user presses Backspace or Delete key, is there a way to get the deleted character.
I need to check it against a RegExp.
Assuming the input box has an id 'input'. Here is how with least amount of code you can find out the last character from the input box.
document.getElementById("input").onkeydown = function(evt) {
const t = evt.target;
if (evt.keyCode === 8) { // for backspace key
console.log(t.value[t.selectionStart - 1]);
} else if (evt.keyCode === 46) { // for delete key
console.log(t.value[t.selectionStart]);
}
};
<input id="input" />
The following will work in all major browsers for text <input> elements. It shouldn't be used for <textarea> elements because the getInputSelection function doesn't account for line breaks correctly in IE. See this answer for a (longer) function that will do this.
function getInputSelection(input) {
var start = 0, end = 0;
input.focus();
if ( typeof input.selectionStart == "number" &&
typeof input.selectionEnd == "number") {
start = input.selectionStart;
end = input.selectionEnd;
} else if (document.selection && document.selection.createRange) {
var range = document.selection.createRange();
if (range) {
var inputRange = input.createTextRange();
var workingRange = inputRange.duplicate();
var bookmark = range.getBookmark();
inputRange.moveToBookmark(bookmark);
workingRange.setEndPoint("EndToEnd", inputRange);
end = workingRange.text.length;
workingRange.setEndPoint("EndToStart", inputRange);
start = workingRange.text.length;
}
}
return {
start: start,
end: end,
length: end - start
};
}
document.getElementById("aTextBox").onkeydown = function(evt) {
evt = evt || window.event;
var keyCode = evt.keyCode;
var deleteKey = (keyCode == 46), backspaceKey = (keyCode == 8);
var sel, deletedText, val;
if (deleteKey || backspaceKey) {
val = this.value;
sel = getInputSelection(this);
if (sel.length) {
deletedText = val.slice(sel.start, sel.end);
} else {
deletedText = val.charAt(deleteKey ? sel.start : sel.start - 1);
}
alert("About to be deleted: " + deletedText);
}
};
No, there is no variable that stores the deleted char. Unless you have a history for Undo/Redo, but it would be difficult to get the information out of that component.
Easiest would be to compare the contents of the input field before and after delete/backspace have been pressed.
You could try something with the caret position:
function getCaretPosition(control){
var position = {};
if (control.selectionStart && control.selectionEnd){
position.start = control.selectionStart;
position.end = control.selectionEnd;
} else {
var range = document.selection.createRange();
position.start = (range.offsetLeft - 1) / 7;
position.end = position.start + (range.text.length);
}
position.length = position.end - position.start;
return position;
}
document.getElementById('test').onkeydown = function(e){
var selection = getCaretPosition(this);
var val = this.value;
if((e.keyCode==8 || e.keyCode==46) && selection.start!==selection.end){
alert(val.substr(selection.start, selection.length));
} else if(e.keyCode==8){
alert(val.substr(selection.start-1, 1));
} else if(e.keyCode==46){
alert(val.substr(selection.start, 1));
}
}
Tested on Chrome 6. See jsFiddle for an example
Related
I'm working on a "autocomplete usernames when TAB is pressed" feature.
I've been able to detect # and to search in a username list.
How to perform the autocompletion now, with a different matching username each time we press TAB ?
var userlist = ['bonjour', 'bleuet', 'bonobo', 'coucou'];
function getCaretPosition(ctrl) {
var start, end;
if (ctrl.setSelectionRange) {
start = ctrl.selectionStart;
end = ctrl.selectionEnd;
} else if (document.selection && document.selection.createRange) {
var range = document.selection.createRange();
start = 0 - range.duplicate().moveStart('character', -100000);
end = start + range.text.length;
}
return {
start: start,
end: end
}
}
$('#writing').keydown(function(e) {
if (e.keyCode == 9) {
var caret = getCaretPosition(this);
var word = /\S+$/.exec(this.value.slice(0, this.value.indexOf(' ',caret.end)));
word = word ? word[0] : null;
if (word.charAt(0) === '#')
alert(userlist.filter((x) => x.indexOf(word.slice(1)) === 0));
e.preventDefault();
return false;
}
});
#writing { width: 500px; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<textarea id="writing">Hello #b what's up? hello #you as well... Type #b and then "TAB" key it should autocomplete usernames
</textarea>
Here is the solution for your issue:
I used .on() to bind keydown to textbox, rather than keypress.
var userlist = ['bonjour', 'bleuet', 'bonobo', 'coucou'];
function getCaretPosition(ctrl) {
var start, end;
if (ctrl.setSelectionRange) {
start = ctrl.selectionStart;
end = ctrl.selectionEnd;
} else if (document.selection && document.selection.createRange) {
var range = document.selection.createRange();
start = 0 - range.duplicate().moveStart('character', -100000);
end = start + range.text.length;
}
return {
start: start,
end: end
}
}
$('#writing').keydown(function(e) {
if (e.keyCode == 9) {
var caret = getCaretPosition(this);
var word = /\S+$/.exec(this.value.slice(0, this.value.indexOf(' ',caret.end)));
word = word ? word[0] : null;
if (word.charAt(0) === '#')
//alert(userlist.filter((x) => x.indexOf(word.slice(1)) === 0));
var stringParts = $(this).val().split('#');
var nameToInsert = userlist.filter((x) => x.indexOf(word.slice(1)) === 0)[0];
var completeString = stringParts[0] + '#' + nameToInsert;
$(this).val(completeString);
e.preventDefault();
return false;
}
});
#writing { width: 500px; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<textarea id="writing">Hello #b what's up? hello #you as well... Type #b and then "TAB" key it should autocomplete usernames
</textarea>
Now it completes the name. But I would work on improving on the algorithm predicting the name.
Here's a very basic example that works in modern browsers (Chrome, Firefox, Edge):
const users = ['asdasd', 'fgsfds', 'Foobar']
const input = document.getElementById('input')
const patt = /\S+$/
input.addEventListener('keydown', e => {
if (e.key !== 'Tab') {
return
}
e.preventDefault()
const start = input.selectionStart
const seg = input.value.slice(0, start)
const match = (seg.match(patt) || [])[0]
if (!match) {
return
}
const idx = users.findIndex(x => x.startsWith(match))
if (idx < 0) {
return
}
const replace = users[users[idx] === match ? (idx + 1) % users.length : idx]
const newSeg = seg.replace(patt, replace)
input.value = newSeg + input.value.slice(start)
input.setSelectionRange(newSeg.length, newSeg.length)
})
<input type="text" id="input" size="50" value="bla asd bla fgs">
It cycles through the names and works at any point in the line. Support for older browsers can be added with Babel and es6-shim.
Replace keypress with keydown. Keypress doesn't fire when tab is pressed, I guess because tab gets input out of focus.
EDIT:
Not perfect, gets undefined sometimes, but you can work from here
EDIT:
ok don't mind this, it's half done and #slikts solution is obviously better, made from scratch and all.
var userlist = ['bonjour', 'bleuet', 'bonobo', 'coucou'];
function getCaretPosition(ctrl) {
var start, end;
if (ctrl.setSelectionRange) {
start = ctrl.selectionStart;
end = ctrl.selectionEnd;
} else if (document.selection && document.selection.createRange) {
var range = document.selection.createRange();
start = 0 - range.duplicate().moveStart('character', -100000);
end = start + range.text.length;
}
return {
start: start,
end: end
}
}
function setCaretPosition(elem, caretPos, caretPosEnd) {
caretPosEnd = caretPosEnd || caretPos;
if(elem != null) {
if(elem.createTextRange) {
var range = elem.createTextRange();
range.move('character', caretPos);
range.select();
}
else {
if(elem.selectionStart) {
elem.focus();
elem.setSelectionRange(caretPos, caretPosEnd);
}
else
elem.focus();
}
}
}
function getIndexCloserTo(str, char, ref) {
if(str.indexOf(char) == -1) return false;
//flip string and find char beggining from reference point
var nstr = str.split("").reverse().join("");
return str.length - 1 - nstr.indexOf(char, str.length - 1 - ref);
}
var lastWordToMatch = "";
var lastAddedWord = "";
var lastIndexUsed = 0;
$(document).ready( function() {
$('#writing').keydown(function(e) {
if (e.keyCode == 9) {
var caret = getCaretPosition(this);
//Get username input part, from the "#" closer to the cursor
//to the position of the cursor
var beginning = getIndexCloserTo(this.value, '#', caret.start);
if( beginning !== false){
var word = this.value.slice( beginning , caret.start);
word = word ? word[0] : null;
if (word.charAt(0) === '#'){
//Get array of names that match what is written after the #
var usermatches = userlist.filter((x) => x.indexOf(word.slice(1)) === 0);
//Check if any matches were found
if( usermatches.length > 0 ){
//If the word is the same as last time, use the next match
if( word == lastWordToMatch ){
//use mod to circle back to beginning of array
index = (lastIndexUsed + 1 ) % usermatches.length;
lastIndexUsed = index;
} else {
//otherwise get first match
index = 0;
lastWordToMatch = word;
}
var text = this.value;
//Remove #
word = word.slice(1);
//replace the portion of the word written by the user plus the
//word added by autocompletion, with the match
$(this).val(text.replace(word+lastAddedWord, usermatches[index]) );
//save the replacement for the previous step, without the user input
//just what autocompetion added
lastAddedWord = usermatches[index].replace(word, '');
//put cursor back where it was
setCaretPosition(this,caret.start);
}
}
}
e.preventDefault();
return false;
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea id="writing">Hello #b what's up? hello #you as well... Type #b and then "TAB" key it should autocomplete usernames
</textarea>
I want to enter a "/" when user enters MM(2 digit) so it will be like MM/YYYY.
I have done similar for credit card number input which insert a space after 4 digit on keypress.
let ccNumber = e.target.value.split(" ").join("");
if (ccNumber.length > 0) {
ccNumber = ccNumber.match(new RegExp('.{1,4}', 'g')).join(" ");
}
e.target.value = ccNumber;
Fiddle
This works with
Regular keyboard input
Copy/Cut/Paste
Selected text
Adding the /
Because you're programmatically adding the / character, you have to update the cursor position whenever that affects the new input value. This can be more than one character if the user is pasting something. Most of the code complexity revolves around this issue.
There are a lot of comments in the code explaining the various situations that come up because of the /.
Full Code
var date = document.getElementById('date');
date.addEventListener('keypress', updateInput);
date.addEventListener('change', updateInput);
date.addEventListener('paste', updateInput);
date.addEventListener('keydown', removeText);
date.addEventListener('cut', removeText);
function updateInput(event) {
event.preventDefault();
var string = getString(event);
var selectionStart = this.selectionStart;
var selectionEnd = this.selectionEnd;
var selectionLength = selectionEnd - selectionStart;
var sanitizedString = string.replace(/[^0-9]+/g, '');
// Do nothing if nothing is added after sanitization
if (sanitizedString.length === 0) {
return;
}
// Only paste numbers that will fit
var valLength = date.value.replace(/[^0-9]+/g, '').length;
var availableSpace = 6 - valLength + selectionLength;
// If `/` is selected it should not count as available space
if (selectionStart <= 2 && selectionEnd >= 3) {
availableSpace -= 1;
}
// Remove numbers that don't fit
if (sanitizedString.length > availableSpace) {
sanitizedString = sanitizedString.substring(0, availableSpace);
}
var newCursorPosition = selectionEnd + sanitizedString.length - selectionLength;
// Add one to cursor position if a `/` gets inserted
if (selectionStart <= 2 && newCursorPosition >= 2) {
newCursorPosition += 1;
}
// Previous input value before current cursor position
var valueStart = date.value.substring(0, this.selectionStart);
// Previous input value after current cursor position
var valueEnd = date.value.substring(this.selectionEnd, date.value.length);
var proposedValue = valueStart + sanitizedString + valueEnd;
// Remove anything that's not a number
var sanitized = proposedValue.replace(/[^0-9]+/g, '');
format(sanitized);
this.setSelectionRange(newCursorPosition, newCursorPosition);
}
function removeText(event) {
if (event.key === 'Backspace' || event.type === 'cut') {
event.preventDefault();
var selectionStart = this.selectionStart;
var selectionEnd = this.selectionEnd;
var selectionLength = selectionEnd - selectionStart;
// If pressing backspace with no selected text
if (selectionLength === 0 && event.type !== 'cut') {
selectionStart -= 1;
// Remove number from before `/` if attempting to delete `/`
if (selectionStart === 2) {
selectionStart -= 1;
}
}
var valueStart = date.value.substring(0, selectionStart);
var valueEnd = date.value.substring(selectionEnd, date.value.length);
// Account for added `/`
if (selectionStart === 2) {
selectionStart += 1;
}
var proposedValue = valueStart + valueEnd;
var sanitized = proposedValue.replace(/[^0-9]+/g, '');
format(sanitized);
this.setSelectionRange(selectionStart, selectionStart);
}
}
function getString(event) {
if (event.type === 'paste') {
var clipboardData = event.clipboardData || window.clipboardData;
return clipboardData.getData('Text');
} else {
return String.fromCharCode(event.which);
}
}
function format(sanitized) {
var newValue;
var month = sanitized.substring(0, 2);
if (sanitized.length < 2) {
newValue = month;
} else {
var year = sanitized.substring(2, 6);
newValue = month + '/' + year;
}
date.value = newValue;
}
<input id="date" type="text" maxlength="7">
Try:
var date = document.getElementById('date');
date.addEventListener('keypress', function (event) {
var char = String.fromCharCode(event.which),
offset = date.selectionStart;
console.log(offset)
if (/\d/.test(char) && offset < 7) {
if (offset === 2) {
offset += 1;
}
date.value = date.value.substr(0, offset) + char + date.value.substr(offset + 1);
date.selectionStart = date.selectionEnd = offset + 1;
}
if (!event.keyCode) {
event.preventDefault();
}
});
<input id="date" type="text" value="mm/yyyy" maxlength="6" size="6">
function keypress(elem) { // get Input
if (typeof elem == 'string') {
if (document.getElementById(elem)) elem = document.getElementById(elem);
if (typeof elem == 'string') elem = document.getElementsByName(elem).item(0);
}
const el = elem; //handle error if not found input
el.maxLength = 19;
el.addEventListener('keypress', function (e) {
const t = e.keyCode || e.which
if (t == 8 || (t > 47 && t < 58)) { // limit numeric characters and backspace
if (t != 8) {
if (el.value.length == 2) el.value += '/';
if (el.value.length == 5) el.value += '/';
if (el.value.length == 10) el.value += ' ';
if (el.value.length == 13) el.value += ':';
if (el.value.length == 16) el.value += ':';
}
} else {
e.preventDefault();
}
});}
Friends ,I have a text box for date to be inserted by the user but i want it to allow user to insert only "dd" ,"mm" and "yyyy" values ,slashes(/)should be already present and as soon as the user inserts "dd" values the pointer should move directly behind the slash for "mm" value and on pressing backspace it should delete the "mm" or "dd "values not the slashes(/).
Here is what i have tried but it does not give me the desired result-
function dateCheck(){
var d_value=$("#pdate").val();
if(d_value.length =="2" || d_value.length =="5")
{
$('#pdate').val($('#pdate').val()+"/");
}
}
html code-
Date:<input type="text" name="p_date" id="pdate" onkeydown="dateCheck()" placeholder="DD/MM/YYYY" required />
There's probably plugins out there, but nobody's been too forthcoming with any. Here's something I've knocked up during my lunch break :).
It's not perfect, and could be improved with some tweaking. For example, highlighting multiple characters for deletion is a bit screwy, but hopefully it's not a bad starter for 10. Credit to this post for getting/setting the caret position. Also, it does allow invalid dates right now - 12/34/5678. It wouldn't be too difficult to sort that out. I might stick something on Git and finish it off when I get home.
I've hard-coded it for dd/mm/yyyy format, but, again, with improvments, it could use the user locale.
$.fn.textboxDatePicker = function() {
var _getCaret = function(el) {
if (el.selectionStart) {
return el.selectionStart;
} else if (document.selection) {
el.focus();
var r = document.selection.createRange();
if (r == null) {
return 0;
}
var re = el.createTextRange(), rc = re.duplicate();
re.moveToBookmark(r.getBookmark());
rc.setEndPoint('EndToStart', re);
return rc.text.length;
}
return 0;
};
var _setCaretPosition = function(elem, caretPos) {
if (caretPos == 2 || caretPos == 5) {
caretPos++;
}
if (elem != null) {
if (elem.createTextRange) {
var range = elem.createTextRange();
range.move('character', caretPos);
range.select();
} else {
if (elem.selectionStart) {
elem.focus();
elem.setSelectionRange(caretPos, caretPos);
}
else elem.focus();
}
}
};
$(this).val('dd/mm/yyyy');
$(this).on("keydown", function(e) {
var keyCode = e.which || e.charCode || e.keyCode;
var key = String.fromCharCode(keyCode);
// arrows, home, end
if ([35, 36].indexOf(keyCode) > -1) {
return true;
}
if (keyCode == 37) {
var newCaretPos = _getCaret(this) - 1;
if ([2, 5].indexOf(newCaretPos) > -1) {
_setCaretPosition(this, newCaretPos - 1);
return false;
}
return true;
}
if (keyCode == 39) {
var newCaretPos = _getCaret(this) + 1;
if ([2, 5].indexOf(newCaretPos) > -1) {
_setCaretPosition(this, newCaretPos + 1);
return false;
}
return true;
}
// backspace
if (keyCode == 8) {
var text = this.value;
var caret = _getCaret(this);
if (caret == 3 || caret == 6) {
caret = caret - 2;
} else {
caret--;
}
if (caret < 0) {
return false;
}
var output = text.substring(0, caret);
key = 'd';
if (caret > 2) {
key = 'm'
};
if (caret > 4) {
key = 'y'
};
this.value = output + key + text.substring(caret + 1);
_setCaretPosition(this, caret);
return false;
}
if (/[0-9]/.test(key)) {
var text = this.value;
var caret = _getCaret(this);
if (caret > 9) {
return false;
}
var output = text.substring(0, caret);
this.value = output + key + text.substring(caret + 1);
_setCaretPosition(this, caret + 1);
}
return false;
});
};
$('.date').textboxDatePicker();
UPDATE
Might be overthinking this. Could you just use 3 separate boxes and style them to look like one, with a little JS to sort out focusing between them?
https://jsfiddle.net/w9by2350/3/
MUCH cleaner!
Try it
function datecheck(){
value=$(#input_id).val();
if(value.match(/^\d\d?\/\d\d?\/\d\d\d\d$/){
return true;
}else{
alert("not valid format")
}
}
JS Bin demo
This regex transform each lower case word to upper case. I have a full name input field. I do want the user to see that each word's first letter he/she pressed is converted to uppercase in the input field.
I have no idea how to properly replace the selected characters in the current input field.
$('input').on('keypress', function(event) {
var $this = $(this),
val = $this.val(),
regex = /\b[a-z]/g;
val = val.toLowerCase().replace(regex, function(letter) {
return letter.toUpperCase();
});
// I want this value to be in the input field.
console.log(val);
});
Given i.e: const str = "hello world" to become Hello world
const firstUpper = str.substr(0, 1).toUpperCase() + str.substr(1);
or:
const firstUpper = str.charAt(0).toUpperCase() + str.substr(1);
or:
const firstUpper = str[0] + str.substr(1);
input {
text-transform: capitalize;
}
http://jsfiddle.net/yuMZq/1/
Using text-transform would be better.
You can convert the first letter to Uppercase and still avoid the annoying problem of the cursor jumping to the beginning of the line, by checking the caret position and resetting the caret position. I do this on a form by defining a few functions, one for all Uppercase, one for Proper Case, one for only Initial Uppercase... Then two functions for the Caret Position, one that gets and one that sets:
function ProperCase(el) {
pos = getInputSelection(el);
s = $(el).val();
s = s.toLowerCase().replace(/^(.)|\s(.)|'(.)/g,
function($1) { return $1.toUpperCase(); });
$(el).val(s);
setCaretPosition(el,pos.start);
}
function UpperCase(el) {
pos = getInputSelection(el);
s = $(el).val();
s = s.toUpperCase();
$(el).val(s);
setCaretPosition(el,pos.start);
}
function initialCap(el) {
pos = getInputSelection(el);
s = $(el).val();
s = s.substr(0, 1).toUpperCase() + s.substr(1);
$(el).val(s);
setCaretPosition(el,pos.start);
}
/* GETS CARET POSITION */
function getInputSelection(el) {
var start = 0, end = 0, normalizedValue, range,
textInputRange, len, endRange;
if (typeof el.selectionStart == 'number' && typeof el.selectionEnd == 'number') {
start = el.selectionStart;
end = el.selectionEnd;
} else {
range = document.selection.createRange();
if (range && range.parentElement() == el) {
len = el.value.length;
normalizedValue = el.value.replace(/\r\n/g, "\n");
// Create a working TextRange that lives only in the input
textInputRange = el.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());
// Check if the start and end of the selection are at the very end
// of the input, since moveStart/moveEnd doesn't return what we want
// in those cases
endRange = el.createTextRange();
endRange.collapse(false);
if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
start = end = len;
} else {
start = -textInputRange.moveStart("character", -len);
start += normalizedValue.slice(0, start).split("\n").length - 1;
if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
end = len;
} else {
end = -textInputRange.moveEnd("character", -len);
end += normalizedValue.slice(0, end).split("\n").length - 1;
}
}
}
}
return {
start: start,
end: end
};
}
/* SETS CARET POSITION */
function setCaretPosition(el, caretPos) {
el.value = el.value;
// ^ this is used to not only get "focus", but
// to make sure we don't have it everything -selected-
// (it causes an issue in chrome, and having it doesn't hurt any other browser)
if (el !== null) {
if (el.createTextRange) {
var range = el.createTextRange();
range.move('character', caretPos);
range.select();
return true;
}
else {
// (el.selectionStart === 0 added for Firefox bug)
if (el.selectionStart || el.selectionStart === 0) {
el.focus();
el.setSelectionRange(caretPos, caretPos);
return true;
}
else { // fail city, fortunately this never happens (as far as I've tested) :)
el.focus();
return false;
}
}
}
}
Then on document ready I apply a keyup event listener to the fields I want to be checked, but I only listen for keys that can actually modify the content of the field (I skip "Shift" key for example...), and if user hits "Esc" I restore the original value of the field...
$('.updatablefield', $('#myform')).keyup(function(e) {
myfield=this.id;
myfieldname=this.name;
el = document.getElementById(myfield);
// or the jquery way:
// el = $(this)[0];
if (e.keyCode == 27) { // if esc character is pressed
$('#'+myfield).val(original_field_values[myfield]); // I stored the original value of the fields in an array...
// if you only need to do the initial letter uppercase, you can apply it here directly like this:
initialCap(el);
} // end if (e.keyCode == 27)
// if any other character is pressed that will modify the field (letters, numbers, symbols, space, backspace, del...)
else if (e.keyCode == 8||e.keycode == 32||e.keyCode > 45 && e.keyCode < 91||e.keyCode > 95 && e.keyCode < 112||e.keyCode > 185 && e.keyCode < 223||e.keyCode == 226) {
// if you only need to do the initial letter uppercase, you can apply it here directly like this:
initialCap(el);
} // end else = if any other character is pressed //
}); // end $(document).keyup(function(e)
You can see a working fiddle of this example here: http://jsfiddle.net/ZSDXA/
Simply put:
$this.val(val);
$(document).ready(function() {
$('input').on('keypress', function(event) {
var $this = $(this),
val = $this.val();
val = val.toLowerCase().replace(/\b[a-z]/g, function(letter) {
return letter.toUpperCase();
});
console.log(val);
$this.val(val);
});
});
As #roXon has shown though, this can be simplified:
$(document).ready(function() {
//alert('ready');
$('input').on('keypress', function(event) {
var $this = $(this),
val = $this.val();
val = val.substr(0, 1).toUpperCase() + val.substr(1).toLowerCase();
$this.val(val);
});
});
An alternative, and better solution in my opinion, would be to only style the element as being capitalized, and then do your logic server side.
This removes the overhead of any javascript, and ensures the logic is handled server side (which it should be anyway!)
$('input').on('keyup', function(event) {
$(this).val(function(i, v){
return v.replace(/[a-zA-Z]/, function(c){
return c.toUpperCase();
})
})
});
http://jsfiddle.net/AbxVx/
This will do for every textfield call function on keyup
where id is id of your textfield and value is value you type in textfield
function capitalizeFirstLetter(value,id)
{
if(value.length>0){
var str= value.replace(value.substr(0,1),value.substr(0,1).toUpperCase());
document.getElementById(id).value=str;
}
}
only use this This work for first name in capital char
style="text-transform:capitalize;
Like
<asp:TextBox ID="txtName" style="text-transform:capitalize;" runat="server" placeholder="Your Name" required=""></asp:TextBox>
$('.form-capitalize').keyup(function(event) {
var $this = $(this),
val = $this.val(),
regex = /\b[a-z]/g;
val = val.toLowerCase().replace(regex, function(letter) {
return letter.toUpperCase();
});
this.value = val;
// I want this value to be in the input field.
console.log(val);
});
I have a sentence defined as a list(a string? an array?- I'm not sure the correct term) that I want returned sequentially as any key is pressed. I'm trying to use .split. Here is the list and function:
var list1 = "This is a test".replace(/\s/g, "\xA0").split("")
function transformTypedChar(charStr) {
var position = $("#verse1").text().length;
if (position >= list1.length) return '';
else return list1[position];
}
Currently, the "T" from the beginning of the list is returned repeatedly, and the rest of the list is ignored. I'm calling the function as follows:
document.getElementById("verse1").onkeypress = function(evt) {
var val = this.value;
evt = evt || window.event;
// Ensure we only handle printable keys, excluding enter and space
var charCode = typeof evt.which == "number" ? evt.which : evt.keyCode;
if (charCode && charCode > 32) {
var keyChar = String.fromCharCode(charCode);
// Transform typed character
var mappedChar = transformTypedChar(keyChar);
var start, end;
if (typeof this.selectionStart == "number" && typeof this.selectionEnd ==
"number") {
// Non-IE browsers and IE 9
start = this.selectionStart;
end = this.selectionEnd;
this.value = val.slice(0, start) + mappedChar + val.slice(end);
// Move the caret
this.selectionStart = this.selectionEnd = start + 1;
} else if (document.selection && document.selection.createRange) {
// For IE up to version 8
var selectionRange = document.selection.createRange();
var textInputRange = this.createTextRange();
var precedingRange = this.createTextRange();
var bookmark = selectionRange.getBookmark();
textInputRange.moveToBookmark(bookmark);
precedingRange.setEndPoint("EndToStart", textInputRange);
start = precedingRange.text.length;
end = start + selectionRange.text.length;
this.value = val.slice(0, start) + mappedChar + val.slice(end);
start++;
// Move the caret
textInputRange = this.createTextRange();
textInputRange.collapse(true);
textInputRange.move("character", start - (this.value.slice(0,
start).split("\r\n").length - 1));
textInputRange.select();
}
return false;
}
};
How do I return the entire list, sequentially? In other words, on the first key event the "T" appears, on the second key event, the "h" appears and so on. I can achieve this in contenteditable divs, but I'm using input type: text fields as I want to autotab between.
The entire code is here: http://jsfiddle.net/NAC77/9/
Calling $(el).text() on input elements returns an empty string, you should be calling $(el).val(): http://jsfiddle.net/NAC77/10/