Develop Reference

onchange and onkeypress javasrcipt PHP

i have one input that needs to be numerical digit and auto calculate value input..
for numerical digit (onkeypress) running well, but for auto calculate (onchange) not working :
echo "<td class='custGanjil300b border1'> <input type=\"text\" name=\"nilaiBobot[<?php echo [$i]; ?>]\" class=\"inputtable textCenter\"
class=\"inputtable textCenter\" onkeypress=\"return mask(this,event);\" onchange=\"hitungtotal();\" ></td>";
this for showing auto calculate :`
echo "<td class='custGanjil300b border1' colspan = '5'><span id=\"total\"></span></td>";
this javascript for onkeypress (numerical digit)
<script>
function mask(textbox, e) {
var charCode = (e.which) ? e.which : e.keyCode;
if (charCode == 46 || charCode > 31&& (charCode < 48 || charCode > 57))
{
alert("Please input numeric characters only");
return false;
}
else
{
return true;
}
}
</script>
this for onchange for auto calculate :
<script type="text/javascript">
function hitungtotal() {
var elems = document.getElementsByName('nilaiBobot');
var sum = 0;
for(var i =0;i<elems.length;i++){
sum+=parseInt(elems[i].value)
}
document.getElementById('total').value = sum;
}
please help me, and sorry for my bad english :(

var elems = document.getElementsByName('nilaiBobot[]');
this line of code cannot get elements.
Please use:
<input type=\"text\" name=\"nilaiBobot\" ...
var elems = document.getElementsByName('nilaiBobot');

Javascript Formatting Numbers With Commas and Dot

I want to create a javascript code to formatting my input number. For example when user type : 100000 it will convert automatically to 100,000 and if user type 1000.22 it will result 1,000.22. I have create code like this:
$(document).ready(function(){
$('input.angka').on("keyup click", function(event){
// skip for arrow keys
if(event.which >= 37 && event.which <= 40){
event.preventDefault();
}
var $this = $(this);
var num = $this.val().replace(/,/gi, "").split("").reverse().join("");
var num2 = RemoveRougeChar(num.replace(/(.{3})/g,"$1,").split("").reverse().join(""));
// the following line has been simplified. Revision history contains original.
$this.val(num2);
});
});
function RemoveRougeChar(convertString){
if(convertString.substring(0,1) == ","){
return convertString.substring(1, convertString.length)
}
return convertString;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<input type="text" class="angka form-control" name="hargak" onkeyup="tots();" />
So all my input textbox which has class 'angka' will be converted. It works if I type it without decimals (10000, 20000, etc). But when I use decimal, these code gone wrong (1000.22 will result 1,000,.22) anyone can fix this code?

One possibility...
You should also accept navigating with arrows left and right...
$(document).ready(function(){
$('input.angka').on("keyup click", function(event){
// skip for arrow keys
if(event.which >= 37 && event.which <= 40){
event.preventDefault();
}
var $this = $(this);
var num = $this.val();
var decs = num.split(".");
num = decs[0];
num = num.replace(/,/gi, "").split("").reverse().join("");
var num2 = RemoveRogueChar(num.replace(/(.{3})/g,"$1,").split("").reverse().join(""));
if(decs.length > 1) {
num2 += '.' + decs[1];
}
$this.val(num2);
});
});
function RemoveRogueChar(convertString){
if(convertString.substring(0,1) == ","){
return convertString.substring(1, convertString.length)
}
return convertString;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<input type="text" class="angka form-control" name="hargak" onkeyup="tots();" />

Disallow special characters in textbox validation

I have javascript code where the validation does not allow more than 20 characters in text box. But, I also want to disallow in special characters in the validation; how can this be accomplished.
Here is my current validation code:
<script type="text/javascript" src="https://code.jquery.com/jquery-1.8.2.js">
/script>
<script type='text/javascript'>
$(function()
{ $('#QI4562040').keyup(function()
{
var desc = $('#QI4562040').val();
var len = desc.length;
if (desc.length >= 10)
{
this.value = this.value.substring(0, 10);
} $('#spntxt').text(10 - len + ' Characters Left');
});
}); </script>

try bellow script this will not allow special charter # $ % ^ & * ( )
function validate() {
var element = document.getElementById('input-field');
element.value = element.value.replace(/[^a-zA-Z0-9#]+/, '');
};
<input type="text" id="input-field" onkeyup="validate();"/>

I just use your codes and modify:
$(function()
{ $('#QI4562040').keyup(function()
{
var desc = $('#QI4562040').val();
var lastChar = desc.slice(-1);
var spc = !((lastChar.charCodeAt()>=48&&lastChar.charCodeAt()<=57)||(lastChar.charCodeAt()>=65&&lastChar.charCodeAt()<=90)||(lastChar.charCodeAt()>=97&&lastChar.charCodeAt()<=122));
if (desc.length >= 10 || spc)
{
this.value = this.value.substring(0, desc.length-1);
} $('#spntxt').text(10 - len + ' Characters Left');
});
});

You must use the keypress event
<input type="text" onkeypress="return isValidCharacter(event)" />
and define the javascript event, the validation can do it with regular expressions
function isValidCharacter(e) {
var key;
document.all ? key = e.keyCode : key = e.which;
var pressedCharacter = String.fromCharCode(e)
var regExp = /^[a-zA-ZÁÉÍÓÚáéñíóú ]*$/;
return regExp.test(pressedCharacter); }
If the method returns true the character will be printed

For Input Length, use Html5 Max Length Property
$(function(){
$('#QI4562040').keyup(function(){
var input_val = $(this).val();
var inputRGEX = /^[a-zA-Z0-9]*$/;
var inputResult = inputRGEX.test(input_val);
if(!(inputResult))
{
this.value = this.value.replace(/[^a-z0-9\s]/gi, '');
}
$('#spntxt').text(10 - input_val.length + ' Characters Left');
});
});
<input type='text' name='' id='QI4562040' maxlength='10'/>
<div id='spntxt'></div>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>

Show error message in a tool tip

I've a user registration form and I want to show the password rules in small tool tip along with the validation message like invalid password or valid password.My password rule is it contains 7 letters, 1 digit and 1 upper case letter etc.
Currently I've both of these but showing it in two different tool tip how can I merge two and show it in a single one.
<html>
<head>
<script src="http://cdn.jquerytools.org/1.2.6/full/jquery.tools.min.js"></script>
<title>Test</title>
</head>
<script>
function validatePassword(obj) {
//rule contains 7 chars and upper case and lower case and digit
var password = obj.value;
var numLowers = 0;
var numCaps = 0;
var numDigits = 0;
var valid = true;
if(password.length > 7) {
for(i = 0; i < password.length; i++) {
var charCode = password.charCodeAt(i);
if(charCode >= 48 && charCode <= 58 )
numDigits++;
else if(charCode >= 65 && charCode <= 90 )
numCaps++;
else if(charCode >= 97 && charCode <= 122 )
numLowers++;
}
if(numDigits < 1 || numCaps < 1 )
valid = false;
}
else {
valid = false;
}
if(!valid){
document.getElementById("password-error").style.display="block";
}
else {
document.getElementById("password-error").style.display="none";
}
}
</script>
<body>
<div>
<form id="test" action ="#">
<div id="password-container">
<input type="text" id= "password" name="password" size="30" onKeyUp="validatePassword(this)" title=" Password contains 7 -20characters <br/> and upper case and digits." />
</div>
<div id="password-error" class="error" style="display:none;">Invalid Password</div>
</form>
</div>
</body>
</html>
$("#test :input").tooltip({
// place tooltip on the right edge
position: "center right",
// a little tweaking of the position
offset: [-2, 10],
// use the built-in fadeIn/fadeOut effect
effect: "fade",
// custom opacity setting
opacity: 0.7
});
You can see a working example here
http://jsfiddle.net/ddrYp/6/

Here's a solution, you won't need to use both the tooltip and password error div.
http://jsfiddle.net/ddrYp/12/
But you may run into problems with this in the future because the tooltips are not uniquely identified. I'm not familiar with the plugin, but if you could add an individual ID to each tooltip, that's fix it for you. Once you do that, you could reference the tooltips by using their ID instead of $(".tooltip")... if you expand this to have multiple inputs when you do $(".tooltip").append(/*something*/) or $(".tooltip").HTML(/*something*/) you're going to modify every tooltip.. which may not matter, because only one is visible at a time... but it's still an inefficiency issue and a bit of a bug
Here's the example of the ebay password verification example that you were looking for:
http://jsfiddle.net/cFrpz/7/

Try this http://www.position-absolute.com/articles/jquery-form-validator-because-form-validation-is-a-mess/

Here you go :
<html>
<head>
<script src="http://cdn.jquerytools.org/1.2.6/full/jquery.tools.min.js"></script>
<title>Test</title>
</head>
<script>
function validatePassword(obj) {
//rule contains 7 chars and upper case and lower case and digit
var password = obj.value;
var numLowers = 0;
var numCaps = 0;
var numDigits = 0;
var valid = true;
if(password.length > 7) {
for(i = 0; i < password.length; i++) {
var charCode = password.charCodeAt(i);
if(charCode >= 48 && charCode <= 58 )
numDigits++;
else if(charCode >= 65 && charCode <= 90 )
numCaps++;
else if(charCode >= 97 && charCode <= 122 )
numLowers++;
}
if(numDigits < 1 || numCaps < 1 )
valid = false;
}
else {
valid = false;
}
if(!valid){
$(".tooltip").append($("#password-error"));
document.getElementById("password-error").style.display="block";
}
else {
document.getElementById("password-error").style.display="none";
}
}
</script>
<body>
<div>
<form id="test" action ="#">
<div id="password-container">
<input type="text" id= "password" name="password" size="30" onKeyUp="validatePassword(this)" title=" Password contains 7 -20characters <br/> and upper case and digits." />
</div>
<div id="password-error" class="error" style="display:none;">Invalid Password</div>
</form>
</div>
</body>
http://jsfiddle.net/ddrYp/9/

I haven't tested this but it should be fine. From your working example, replace this:
if(!valid){
document.getElementById("password-error").style.display="block";
}
else {
document.getElementById("password-error").style.display="none";
}
with this:
$tooltip = $(".tooltip");
if(!valid && $tooltip.find("div.error").length < 1){
$tooltip.append("<div class='error'>"+$("#password-error").html()+"</div>");
}
else if(valid) {
$tooltip.find(".error").remove();
}

Limit number of lines in textarea and Display line count using jQuery

Using jQuery I would like to:
Limit the number of lines a user can enter in a textarea to a set number
Have a line counter appear that updates number of lines as lines are entered
Return key or \n would count as line
$(document).ready(function(){
$('#countMe').keydown(function(event) {
// If number of lines is > X (specified by me) return false
// Count number of lines/update as user enters them turn red if over limit.
});
});
<form class="lineCount">
<textarea id="countMe" cols="30" rows="5"></textarea><br>
<input type="submit" value="Test Me">
</form>
<div class="theCount">Lines used = X (updates as lines entered)<div>
For this example lets say limit the number of lines allowed to 10.

html:
<textarea id="countMe" cols="30" rows="5"></textarea>
<div class="theCount">Lines used: <span id="linesUsed">0</span><div>
js:
$(document).ready(function(){
var lines = 10;
var linesUsed = $('#linesUsed');
$('#countMe').keydown(function(e) {
newLines = $(this).val().split("\n").length;
linesUsed.text(newLines);
if(e.keyCode == 13 && newLines >= lines) {
linesUsed.css('color', 'red');
return false;
}
else {
linesUsed.css('color', '');
}
});
});
fiddle:
http://jsfiddle.net/XNCkH/17/

Here is little improved code. In previous example you could paste text with more lines that you want.
HTML
<textarea data-max="10"></textarea>
<div class="theCount">Lines used: <span id="linesUsed">0</span></div>
JS
jQuery('document').on('keyup change', 'textarea', function(e){
var maxLines = jQuery(this).attr('data-max');
newLines = $(this).val().split("\n").length;
console.log($(this).val().split("\n"));
if(newLines >= maxLines) {
lines = $(this).val().split("\n").slice(0, maxLines);
var newValue = lines.join("\n");
$(this).val(newValue);
$("#linesUsed").html(newLines);
return false;
}
});

For React functional component that sets new value into state and forwards it also to props:
const { onTextChanged, numberOfLines, maxLength } = props;
const textAreaOnChange = useCallback((newValue) => {
let text = newValue;
if (maxLength && text.length > maxLength) return
if (numberOfLines) text = text.split('\n').slice(0, numberOfLines ?? undefined)
setTextAreaValue(text); onTextChanged(text)
}, [numberOfLines, maxLength])

A much ugly , but somehow working example
specify rows of textarea
<textarea rows="3"></textarea>
and then
in js
$("textarea").on('keydown keypress keyup',function(e){
if(e.keyCode == 8 || e.keyCode == 46){
return true;
}
var maxRowCount = $(this).attr("rows") || 2;
var lineCount = $(this).val().split('\n').length;
if(e.keyCode == 13){
if(lineCount == maxRowCount){
return false;
}
}
var jsElement = $(this)[0];
if(jsElement.clientHeight < jsElement.scrollHeight){
var text = $(this).val();
text= text.slice(0, -1);
$(this).val(text);
return false;
}
});

For the React fans out there, and possibly inspiration for a vanilla JS event handler:
onChange={({ target: { value } }) => {
const returnChar = /\n/gi
const a = value.match(returnChar)
const b = title.match(returnChar)
if (value.length > 80 || (a && b && a.length > 1 && b.length === 1)) return
dispatch(setState('title', value))
}}
This example limits a textarea to 2 lines or 80 characters total.
It prevents updating the state with a new value, preventing React from adding that value to the textarea.