this is my .js function
function validateSNo(inputtxt,elem){
var SNoFormat = /^\d{6}$/;
if (SNoFormat.test(inputtxt)){
document.getElementById(elem).innerHTML = "";
return true;
}
else {
document.getElementById(elem).innerHTML = "This should only contain 6 numbers XXXXXX";
return false;
}
this is the html code
<label>Student No.</label>
<input type="text" name="sNo" size="6" maxlength="6" onblur="return validateSNo(document.FormStuReg.sNo.value,sNo-validation)" autofocus><span class="errorMsg">*</span>
<br>
<span class="errorMsg" id="sNo-validation"></span>
i want to display the validation message in the span area when an invalid input is detected.this code doesn't work..It works fine without the parameters when the function is written like this.
function validateSNo(){
var SNoFormat = /^\d{6}$/;
if (SNoFormat.test(document.FormStuReg.sNo.value)){
document.getElementById("sNo-validation").innerHTML = "";
return true;
}
else {
document.getElementById("sNo-validation").innerHTML = "This should only contain 6 numbers XXXXXX";
return false;
}
}
I have to use the same validation in few other places so its better if i can pass the values as parameters to single function or else i have to write the same function over n over again with different element id's.
Look at the onblur attribute in your HTML.
onblur="return validateSNo(document.FormStuReg.sNo.value,sNo-validation)"
Notice that sNo-validation is not in quotation marks. That means that it's interpreted as two variables: sNo and validation, which are undefined, and the - is interpreted as a minus sign. Subtracting two undefined variables doesn't make sense, so that's why you get an error.
Just add quotation marks. Since it's already inside quotation marks because it's an HTML attribute, use single quotes.
onblur="return validateSNo(document.FormStuReg.sNo.value, 'sNo-validation')"
BTW, since you are using a scheme like sNo and sNo-validation then you don't need to pass the ID. I'll guess that document.FormStuReg.sNo.value is the input that the listener is on, so you can just pass a reference to the element using this:
<input ... name="sNo" ... onblur="return validateSNo(this)" ... >
And then in the function:
// element will reference the input
function validateSNo(element){
var SNoFormat = /^\d{6}$/;
if (SNoFormat.test(element.value)){
// Use the element name to get the message element
document.getElementById(element.name + "-validation").innerHTML = "";
return true;
}
else {
document.getElementById(element.name + "-validation").innerHTML = "This should only contain 6 numbers XXXXXX";
return false;
}
}
and the if..else can use the conditional ? : operator:
document.getElementById(element.name + "-validation").innerHTML = SNoFormat.test(element.value)? '' : 'This should only contain 6 numbers XXXXXX';
Returning true or false from the listener has no effect whatever.
If you take this one step further, you can define the validation to run in a class value or data- attribute, then you don't need to pass anything. Just validate all form controls based on their class or data- values.
Related
I have an html input list, with an associated datalist, defined as follows:
<input list="mylist" id="my-input" name="friend-name"
placeholder="Begin typing friend's name here..."
required class="form-control">
The list itself (and the associated datalist) is working fine. However, each of my entries are of the form: "String [numeric_id]"
What I am wondering is if there is any way that I can somehow hide
the [numeric_id] part before the form is submitted.
I have looked at the pattern attribute, but that seems to limit the
actual data allowed in the input, which isn't what I want - I just
want the part between square brackets [] to be hidden, but still
submitted to the form.
It would be ok to move it to another input of type=hidden as well.
Is there any possible way to do that?
#isherwood, here is my form tag:
<form action="/chat_forwarding/modal_edit_msg.php" id="fwd-form" method="POST" class="form-inline" style="display: block;">
If you're not using any framework that support binding, you should listen to input events and update a hidden input based on that.
This is a function that may give you the idea:
let realInput = document.getElementById('real-input');
let userInput = document.getElementById('user-input');
userInput.addEventListener('input', function(value) {
const inputValue = value.target.value;
realInput.value = inputValue; // update the hidden input
const userInputResult = inputValue.match(/\[[^\[]*\]/); // the regex for [numberic_id]
if (userInputResult) {
userInput.value = inputValue.substring(0, [userInputResult.index - 1]); // -1 is to remove the space between the 'string' and the '[numeric_id]'
}
});
I should have mentioned that my input is also using Awesomplete (and jQuery). For this reason, binding normal events like keyup did not work (the event would fire whenever a user typed a key). I was able to achieve the functionality I wanted with the awesomplete-selectcomplete event as follows (this will add a hidden input element with value of the id from a string of the form "String [id]"):
$("#my-input").on('awesomplete-selectcomplete',function(){
var fullStr = this.value;
//alert(fullStr);
var regex = /\[[0-9]+\]/g;
var match = regex.exec(fullStr);
//alert(match[0]);
if (match != null) // match found for [id]
{
var fullName = fullStr.substr(0,fullStr.lastIndexOf("[")-1);
var x = match[0];
var id = x.substr(1, x.lastIndexOf("]")-1);
//alert(id);
$('#fwd-form').prepend('<input type="hidden" name="h_uid" value="' + id + '">');
$('#my-input').val(fullName);
}
});
So I need to mask a SSN# input field, lets say the ssn is 123-45-6789, I need to display ***-**-6789 (real time as they enter each digit) but I still need to retain the original value to submit.
I got to the point where I can do that if the user strictly enters the value but it breaks if the user does anything else such as delete, or moving cursor to a random position and adds/deletes a number, copy pasting/deleting, etc. I really don't want to listen to a bunch of events to make this work if thats even possible.
I also tried having a div sit on top of the input field to display the masked ssn while the actual ssn was transparent/hidden behind it but again they lose the functionality of being able to add/delete/select delete/paste in random parts (other then when they start at the end) and also the cursor not totally in sync with the end of the ssn number (asterisk size was the issue). This also broke on some mobile browsers.
I also thought of having two separate input fields, one type password, and one type text sit right next to each other, but again highlighting and deleting/pasting between the two would be an issue.
Ideally if there was something out there to have an input field have two types, part of the value be type password and the rest be type text, that would be fantastic. Btw this is for react js app.
TLDR: Need a fully functional input field that will do password masking on only first 5 digits of ssn and be plaintext for last 4 digits (while having the full plaintext value available for submission).
Thanks!
This might be a little sloppy, but it works as you want it to, is all in one text field, returns the full accurate SSN (despite replacing first 5 values with bullet points), and allows for editing anywhere in the field.
<input type="password" id="ssn" maxlength=9 />
<script>
var ssn = document.getElementById('ssn');
ssn.addEventListener('input', ssnMask, false);
var ssnFirstFive = "";
var secondHalf = "";
var fullSSN = "";
function ssnMask(){
if (ssn.value.length <= 5){
ssn.type = 'password';
}
else{
detectChanges();
secondHalf = ssn.value.substring(5);
ssn.type = 'text';
ssn.value = "•••••";
ssn.value += secondHalf;
fullSSN = ssnFirstFive + secondHalf;
}
}
function detectChanges() {
for (var i = 0; i < 5; i++){
if (ssn.value[i] != "•"){
ssnFirstFive = ssnFirstFive.substring(0, i) + ssn.value[i] + ssnFirstFive.substring(i+1);
}
}
}
</script>
Essentially, every time the input is changed, it checks to see if it matches the first 5 from before, and if it doesn't, it will update the necessary characters.
You can use 3 different fields and make then password fields.
Add a focus handler that changes their type into text and a blur handler that changes them back to password.
You can combine them before submission or on the server.
#ssn1{width:25px;}
#ssn2{width:20px;}
#ssn3{width:35px;}
<input type="password" name="ssn" maxlength=3 id="ssn1" />
<input type="password" name="ssn" maxlength=2 id="ssn2"/>
<input type="password" name="ssn" maxlength=4 id="ssn3"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
$('[name="ssn"]').focus(function() {
$(this).attr("type", "text")
});
$('[name="ssn"]').blur(function() {
$(this).attr("type", "password")
});
</script>
You can also write a pass handler to all a full SSN to be pasted in the first field and have all three fields get set.
This is the closest you are going unless you work with a single full text box and give the user the ability to mask and unmask the field.
In production apps, this actually the approach I take:
Masked:
Unmasked:
You can implement you own focus/blur functions to automatically unmask/mask the field as needed.
Achieve this using html data attributes.
i have used the same html tag and store actual value in html tag attribute (data-value) to use later on and store value to display in html tag attribute value.
Function to partial mask input value
function mask_field_value(obj, mask_letters_count=7){
mask_value = $(this).data('mask-value') || '';
unmask_value = $(this).data('unmask-value') || '';
if (obj.value.length <= mask_letters_count){
obj.type = 'password';
mask_value = obj.value;
$(this).data('mask-value', obj.value);
} else {
obj.type = 'text';
unmask_value = obj.value.substring(mask_letters_count);
obj.value = "*".repeat(mask_letters_count) + unmask_value;
$(this).data('unmask-value', unmask_value);
}
$(this).data('value', mask_value + unmask_value);
console.log($(this).data('value'));
}
Add an event on input fields to mask
$(document).ready(function () {
$(document).on('keyup', '.mask_input_display', function () {
mask_field_value(this);
});
});
I have a form which has input fields that expect numbers only.
I'm using javascript to validate the form when the value of the field changes.
If the value is numeric, do nothing.
If the value is not numeric, set it to zero and put focus in that text field. Essentially, I'm trying to trap the cursor in that field until a numeric value is entered. For some unknown reason, focus is not being placed on that form element. cell.focus() does not work. I've even tried document.getElementById(cel.getAttribute("ID")).focus(); What might I be doing wrong?
<html>
<head>
<script>
function NAN(cell){
if (cell.value != "") {
var re = /^(0|[1-9][0-9]*)$/;
if (re.test(cell.value) == false) {
alert('You must supply a numeric value greater than 0.');
cell.value = "0";
cell.focus();
}
}
}
</script>
</head>
<body>
<input type="text" name="num" value="" onchange="NAN(cell)"/>
</body>
</html>
Your problem is in the onchange attribute:
<input type="text" name="num" value="" onchange="NAN(cell)"/>
The value is executed as JavaScript code directly. You're passing code, not just a generic signature or prototype.
Inside those event handler snippets, there's a special object this defined, referring to the current DOM element (the input tag in this example).
(Just to mention it, there is also a second predefined object event, which most likely caused your confusion.)
As a simple fix for your issue, replace cell with this in the call and it should work:
<input type="text" name="num" value="" onchange="NAN(this)"/>
It's also important to note that you should keep in mind that this verification requires JavaScript to be executed. If it's disabled, the user might still pass any values, so you should check the value server side as well (assuming this isn't just client-only code).
As an alternative to using JavaScript, you could just use HTML5 to force a specific pattern on inputs. In this case this would be trivial to do:
<input type="text" name="num" value="" pattern="(?!0)\d+" title="Quantity">
The user won't be able to submit the form unless the pattern is validated, so there's no need to force the input focus. The pattern always has to match the full value, from beginning to the end. The title attribute is typically used to provide more information in the error popup.
There are two things done:
You have to change cell to this with onchange.
According to this question at least with Firefox setTimeout has to wrap this focus-method so that it works as expected.
And a more user-friendly approach is inserted as well at the second input-field.
Hope this example helps you:
function NAN(cell) {
if (cell.value != '') {
var re = /^(0|[1-9][0-9]*)$/;
cell.value = cell.value[0]=='0'?+cell.value:cell.value;
if (re.test(cell.value) == false) {
alert('You must supply a numeric value greater than 0.');
cell.value = '0';
setTimeout(function () {
cell.select();
cell.focus();
}, 0);
}
}
}
/*
* a more user friendly approach
*/
function NAN2(cell) {
if (cell.value != '') {
var re = /^(0|[1-9][0-9]*)$/;
cell.value = cell.value[0]=='0'?+cell.value:cell.value;
if (re.test(cell.value) == false) {
alert('You must supply a numeric value greater than 0.');
cell.value = '0';
setTimeout(function () {
cell.select();
cell.focus();
markElement(cell);
}, 0);
}
else{
tickElement(cell);
}
}
}
function tickElement(cell){
cell.setAttribute('style','border: 1px solid green');
}
function markElement(cell){
cell.setAttribute('style','border: 1px solid red');
}
<p>
Your approach(onchange):
<input type="text" name="num" value="" onchange="NAN(this)"/>
</p>
<p>
Or you can use a more user friendly approach to notify an user right now when they are tipping something wrong (onkeyup):
<input type="text" name="num" value="" onkeyup="NAN2(this)"/>
</p>
I was wondering if anyone can help? What I am trying to do is retrieve the word count from javascript code into a form and then pass it into php along with the rest of the form which will check that the word count is a certain length or else it won't be submitted.
The javascript is as follows.
counter = function() {
var value = $('#msg').val();
if (value.length == 0) {
$('#wordCount').html(0);
$('#totalChars').html(0);
$('#charCount').html(0);
$('#charCountNoSpace').html(0);
return;
}
var regex = /\s+/gi;
var wordCount = value.trim().replace(regex, ' ').split(' ').length;
var totalChars = value.length;
var charCount = value.trim().length;
var charCountNoSpace = value.replace(regex, '').length;
$('#wordCount').html(wordCount);
$('#totalChars').html(totalChars);
$('#charCount').html(charCount);
$('#charCountNoSpace').html(charCountNoSpace);
};
$(document).ready(function() {
$('#count').click(counter);
$('#msg').change(counter);
$('#msg').keydown(counter);
$('#msg').keypress(counter);
$('#msg').keyup(counter);
$('#msg').blur(counter);
$('#msg').focus(counter);
});
My problem is returning wordCount into a hidden field in a form. I am not too good with javascript and am not sure how to modify this code to make it work. The rest I can figure out but am stuck here. Thank you for your help, it is greatly appreciated.
$('#wordCount').val(wordCount);
$('#totalChars').val(totalChars);
$('#charCount').val(charCount);
$('#charCountNoSpace').val(charCountNoSpace);
Use .val() instead of .html(), because .val() refers to the value of an input field.
Your HTML inside the form should include a hidden input field:
<input type="hidden" id="word_count" name="word_count" value="0" />
Then inside your JS:
$('#word_count').val(wordCount);
All together embedded inside your function:
counter = function() {
var value = $('#msg').val();
if (value.length == 0) {
$('#wordCount').html(0);
$('#totalChars').html(0);
$('#charCount').html(0);
$('#charCountNoSpace').html(0);
return;
}
var regex = /\s+/gi;
var wordCount = value.trim().replace(regex, ' ').split(' ').length;
var totalChars = value.length;
var charCount = value.trim().length;
var charCountNoSpace = value.replace(regex, '').length;
$('#wordCount').html(wordCount);
$('#word_count').val(wordCount);
$('#totalChars').html(totalChars);
$('#charCount').html(charCount);
$('#charCountNoSpace').html(charCountNoSpace);
};
$(document).ready(function() {
$('#count').click(counter);
$('#msg').change(counter);
$('#msg').keydown(counter);
$('#msg').keypress(counter);
$('#msg').keyup(counter);
$('#msg').blur(counter);
$('#msg').focus(counter);
});
If you have INPUT fields in your form, use val()
$('#wordCount').val(wordCount)
That would work for a field like this:
Be aware that there's a difference between "id" and "class". jQuery allows you to select elements based on their properties. The "id" property gets selected with "#", just like you'd do it in CSS. So make sure you have that "id='wordCount'" defined in your hidden field.
Have a look at this http://www.hscripts.com/scripts/JavaScript/word-count.php
There are plenty of examples online, just google "javascript count words in textbox"
Some imporntant notes:
A very long string with no spaces is still 1 word so don't forget to set the max length for fields
If you are doing this as a sort of validation be aware of the fact that you can not trust a form field because it can be easily manipulated, so don't forget to check the word count on the server side after the form is submitted.
The Code that you are showing is not just javascript it also includes jquery, please make sure you included jquery
<script src = "http://code.jquery.com/jquery-1.11.1.min.js"></script>
$('#field').val('asdf'); //Sets Value of a input type="text"
$('#field').html('sadf'); //Sets the html of a div
Using javascript you use either value for a input or innerHtml for a div or other text based element
document.getElementById('field').value = 'asdfsadf';
document.getElementById('field').innerHtml= 'asdfsadf';
Also instead of using a form submit consider using jquery $.ajax(there is nothing wrong with form submits but there are benefits to knowing jquery as well such as you came make async requests
http://api.jquery.com/jquery.ajax/
You will want to use a hidden field such as the following and have it in the form
<form id="myform" action='posttome.php'>
<input type="hidden" id="wordCount"/>
<input type="submit" value="sbumit"> //Submits Form
</form>
Then set its value by using of of three methods, a an elements html, an elements value, or a javascript variable $('#wordCount').val()
$('#wordCount').val($('#wordCountSoruceDiv').html()); // Sets the value to another divs html
$('#wordCount').val($('#wordCountSourceInput').val()); // Sets the value to another inputs value
$('#wordCount').val(wordCountVariable); // Sets the value to a variable
I'm doing a simple number comparison on the keyUp event of an input field. For some reason, I'm not getting the expected result, and I can't figure out why. What should happen is that if the user-entered number is larger than that stored in the html attribute, the background should turn red, otherwise it stays white. Simply entering '9' will turn the background red. ??
var admin = $('input[name="diskStorage"]').attr('data-adminstorage'); // 2097152000
$('#new-user input[name="diskStorage"]').keyup(function(){
if(admin < $(this).val())
$(this).css('background','red');
else
$(this).css('background','white');
});
When I debug these values, if(2097152000 < 549) is returning true. Here's the html, in case that makes any difference:
<form action="administrate.php" method="post" id="new-user">
<table><tbody><tr>
...
</tr><tr>
<td>Disk Storage Limit:</td>
<td>
<input type="text" data-adminStorage="2097152000" name="diskStorage" value="" /> megaBytes<br />
<span id="info"></span></td>
...
</tr></tbody></table>
Here it is live: http://jsfiddle.net/JMC_Creative/dqAJj/2/
.attr and .val() return String objects - use the unary + operator to convert it to a numeric value.
var admin = $('input[name="diskStorage"]').attr('data-adminstorage');
admin = +admin;
if(admin < +$(this).val()) {
//...
}
Try adding a /1 after retrieving the admin value, to make it a number not a string.
var admin = $('input[name="diskStorage"]').attr('data-adminstorage')/1;
Edit: also on the this.val:
$(this).val()/1;
They are probably both strings. You should convert them to numbers first:
var admin = Number($('input[name="diskStorage"]').attr('data-adminstorage')); // 2097152000
$('#new-user input[name="diskStorage"]').keyup(function(){
if(admin < Number($(this).val()))
$(this).css('background','red');
else
$(this).css('background','white');
});