I'm really new in JavaScript and I would like to add to my input text, space insertion for IBAN account registering.
<input type="text" name="iban" onkeyup="if(this.value.length > 34){this.value=this.value.substr(0, 34);}" />There is my input field; could someone tell me how I can do this?
The existing answers are relatively long, and they look like over-kill. Plus they don't work completely (for instance, one issue is that you can't edit previous characters).
For those interested, according to Wikipedia:
Permitted IBAN characters are the digits 0 to 9 and the 26 upper-case Latin alphabetic characters A to Z.
Here is a relatively short version that is similar to the existing answers:
document.getElementById('iban').addEventListener('input', function (e) {
e.target.value = e.target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
});<label for="iban">iban</label>
<input id="iban" type="text" name="iban" />As stated above, the caveat is that you can't go back and edit previous characters. If you want to fix this, you would need to retrieve the caret's current position by initially accessing the selectionEnd property and then setting the caret's position after the regex formatting has been applied.
document.getElementById('iban').addEventListener('input', function (e) {
var target = e.target, position = target.selectionEnd, length = target.value.length;
target.value = target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
target.selectionEnd = position += ((target.value.charAt(position - 1) === ' ' && target.value.charAt(length - 1) === ' ' && length !== target.value.length) ? 1 : 0);
});<label for="iban">iban</label>
<input id="iban" type="text" name="iban" />You will notice that there is a slight issue when the character after the caret is a space (because the space wasn't accounted for when initially retrieving the caret's position to begin with). To fix this, the position is manually incremented if the succeeding character is a space (assuming a space was actually added - which is determined by comparing the length before and after replacing the characters).
Using plain-JavaScript, I'd suggest:
function space(el, after) {
// defaults to a space after 4 characters:
after = after || 4;
/* removes all characters in the value that aren't a number,
or in the range from A to Z (uppercase): */
var v = el.value.replace(/[^\dA-Z]/g, ''),
/* creating the regular expression, to allow for the 'after' variable
to be used/changed: */
reg = new RegExp(".{" + after + "}","g")
el.value = v.replace(reg, function (a, b, c) {
return a + ' ';
});
}
var el = document.getElementById('iban');
el.addEventListener('keyup', function () {
space(this, 4);
});
Somewhat belatedly, my rewrite of the above to handle strings, rather than DOM nodes:
function space(str, after) {
if (!str) {
return false;
}
after = after || 4;
var v = str.replace(/[^\dA-Z]/g, ''),
reg = new RegExp(".{" + after + "}", "g");
return v.replace(reg, function (a) {
return a + ' ';
});
}
var el = document.getElementById('iban');
el.addEventListener('keyup', function () {
this.value = space(this.value, 4);
});
References:
You have to capture each group of 4 digits and then put a space between each group.
$('input').blur(function () {
//Replace each group 4 digits with a group plus a space
var reformat = this.value.replace(/(\d{4})/g, function(match){
return match + " ";
});
this.value = reformat;
})
And this one updates the element while typing
//Keys pressed 0 times
var downed = 0;
$('#test').keydown(function (g) {
if(g.code.match("^Digit")){
downed++;
console.log(g)
}
if(downed == 1){
var reformat = this.value.replace(/(\d{4}\s*)/g, function(match){
//Strip spaces
if(match.match(/\s/)){return match;}
return match + " ";
});
console.log(reformat);
this.value = reformat;
//Start recount
downed = 0;
}
});
for thousands on angular 4 in a pipe
integer = integer.replace(/[^\dA-Z]/g, '').replace(/(.{3})/g, '$1.').trim();
The code from Josh Crozie is really nice, but not complete.
Two issues with it;
The code below is based on the code of Josh Crozie, now with the two issues mentioned above fixed and a little more verbose for readability purpose:
var isAndroid = navigator.userAgent.indexOf("ndroid") > -1;
var element = document.getElementById('iban');
element.addEventListener('input', function () {
if (isAndroid) {
// For android 7+ the update of the cursor location is a little bit behind, hence the little delay.
setTimeout(reformatInputField);
return;
}
reformatInputField();
});
function reformatInputField() {
function format(value) {
return value.replace(/[^\dA-Z]/gi, '')
.toUpperCase()
.replace(/(.{4})/g, '$1 ')
.trim();
}
function countSpaces(text) {
var spaces = text.match(/(\s+)/g);
return spaces ? spaces.length : 0;
}
var position = element.selectionEnd;
var previousValue = element.value;
element.value = format(element.value);
if (position !== element.value.length) {
var beforeCaret = previousValue.substr(0, position);
var countPrevious = countSpaces(beforeCaret);
var countCurrent = countSpaces(format(beforeCaret));
element.selectionEnd = position + (countCurrent - countPrevious);
}
}<label for="iban">iban</label>
<input id="iban" type="text" name="iban" size="35" />I wrote a simple function extending David's function to handle the last space. Also you can specify the separator.
function spacify(str, after, c) {
if (!str) {
return false;
}
after = after || 4;
c = c || " ";
var v = str.replace(/[^\dA-Z]/g, ''),
reg = new RegExp(".{" + after + "}", "g");
return v.replace(reg, function (a) {
return a + c;
}).replace(/[^0-9]+$/, "");
}
console.log(spacify("123123123131",4," "))
console.log(spacify("12312312313",4,"-"))I need the same but for BVR/BVR+ swiss payment form. So what I need is add a space every 5 chars but from the end of the string.
Example : "52 86571 22001 00000 10520 15992" or sometimes shorter like "843 14293 10520 15992".
So, here is the solution by reversing the string before and after adding spaces if rev=1.
function space(str, stp, rev) {
if (!str) {
return false;
}
if (rev == 1) {
str = str.split('').reverse().join('');
}
if(stp > 0) {
var v = str.replace(/[^\dA-Z]/g, ''),
reg = new RegExp(".{" + stp + "}", "g");
str = v.replace(reg, function (a) {
return a + ' ';
});
}
if (rev == 1) {
str = str.split('').reverse().join('');
}
return str;
}
Use :
var refTxt = space(refNum, 5, 1);
EDIT : PHP version added
function space($str=false, $stp=0, $rev= false) {
if(!$str)
return false;
if($rev)
return trim(strrev(chunk_split(strrev($str), $stp, ' ')));
else
return trim(chunk_split($str, $stp, ' '));
}
This is the shortest version using JQuery on input with type number or tel:
$('input[type=number], input[type=tel]').on('input', function (e) {
e.target.value = e.target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
});
You can also change the 4 to any other character limit you want.
onChangeText={number => {
const data =
number.length % 5 !== 4
? number
.replace(/[^\dA-Z]/g, '')
.replace(/(.{4})/g, '$1-')
.trim()
: number;
this.setState({
...this.state,
card: {...this.state.card, number: data},
});
}}
If you are trying to use for text input to adjust with credit card then this method will help you solve the backspace problem too
document.getElementById('iban').addEventListener('input', function (e) {
e.target.value = e.target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
});<label for="iban">iban</label>
<input id="iban" type="text" name="iban" />To Add space after 4 Digits Useful to validate IBAN Number
document.getElementById('IBAN').addEventListener('input', function (e) {
e.target.value = e.target.value.replace(/[^\dA-Z]/g, '').replace(/(.{4})/g, '$1 ').trim();
});
<label for="IBAN">IBAN</label>
<input id="IBAN" maxlength="14" type="text" name="IBAN" />