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Javascript fires twice Wordpress admin metabox

I added a inline Javascript code to my metabox callback function.
add_action( 'add_meta_boxes', function() {
add_meta_box( 'catalog-item', 'Gegevens', 'catalog_details_callback', 'catalog', 'advanced' );
});
function catalog_details_callback( $post ) {
<input type="text" class="price" name="price" id="price"/>
<script type="text/javascript">
document.getElementById('price').onfocusout = function() {
var regex = /^(\d+[,]+\d{2})$/;
if (regex.test(this.value) == false ) {
this.value = this.value.replace(/([^(\d|,)]|,{2})/g, "");
}
var before = this.value.replace(",", ".");
var roundoff = parseFloat(before).toFixed(2);
var after = roundoff.replace(".", ",");
alert(after);
}
</script>
}
If the function is triggered the function fires the alert twice.
Does anybody know how I fix this?

There could be multiple reason for this:
Please check if you have multiple event listeners. If so, try to check your condition. understand about event listeners here: https://developer.mozilla.org/en-US/docs/Web/API/Element/focusout_event
onfocusout bubbles, means if you have any event written on parent as well as child then both gets called. try to add
document.getElementById('price').onfocusout = function(event) {
event.preventDefault();
event.stopPropagation();
var regex = /^(\d+[,]+\d{2})$/;
if (regex.test(this.value) == false ) {
this.value = this.value.replace(/([^(\d|,)]|,{2})/g, "");
}
var before = this.value.replace(",", ".");
var roundoff = parseFloat(before).toFixed(2);
var after = roundoff.replace(".", ",");
alert(after);
}
If still issue persists then try to add the debugger in the function can check the call trace in google developers console.

I had the same issue with Wordpress.
This works for me
const price_field = document.getElementById('price');
price_field.addEventListener('focusout', (event) => {
var regex = /^(\d+[,]+\d{2})$/;
if (regex.test(price_field.value) == false ) {
this.value = price_field.value.replace(/([^(\d|,)]|,{2})/g, "");
}
var before = price_field.value.replace(",", ".");
var roundoff = parseFloat(before).toFixed(2);
var after = roundoff.replace(".", ",");
price_field.value = after;
alert(after);
});

append to div one time

I am revisiting this code I made a year ago with the help of another person. Unfortunately I don't have contact with them anymore to get more help. Basically It dynamically adds classs to the tb and b nodes of a document coming from namesToChange. Now what I am trying to do is append some text to the div with class dtxt node but still use this code below. I am using the code $('td.pn_adm_jeff').children('div.dtxt').append('zzz'); and it works but it constantly appends more than once as seen in the photo below. How do I go about making it add once and stop?
Photo
http://img6.imageshack.us/img6/5392/7c23ddb145954aefadb1b9f.png
Code
function customizefields(a) {
$('td b').each(function () {
name = $(this).text();
if (name.indexOf(" ") != -1) {
name = name.substring(0, name.indexOf(" "))
}
if (a[name]) {
this.className = a[name].class;
this.parentNode.className = a[name].img
}
})
$('td.pn_adm_jeff').children('div.dtxt').append('zzz');
}
var namesToChange = {
'Jeff' :{'class':'pn_adm','img':'pn_adm_jeff'}
};
setInterval(function () {
customizefields(namesToChange)
}, 1000);
Update
var needsUpdate = true;
function customizefields(a) {
$('td b').each(function () {
name = $(this).text();
if (name.indexOf(" ") != -1) {
name = name.substring(0, name.indexOf(" "));
}
if (a[name]) {
this.className = a[name].class;
this.parentNode.className = a[name].img;
}
});
if (needsUpdate) {
$('td.pn_adm_jeff').children('div.dtxt').append('testing');
needsUpdate = false;
}
}
var namesToChange = {
'jeff' :{'class':'pn_adm','img':'pn_adm_jeff'};
};
setTimeout(function () {
customizefields(namesToChange);
}, 1000);

use setTimeout rather than setInterval (interval is for repeating a timer task, timeout is a single timer task)
To prevent a certain task from occuring more than once in a repeated task, there is a simple fix.
// global variable
var needsUpdate = true;
// now in the timer task
if (needsUpdate) {
$('td.pn_adm_jeff').children('div.dtxt').append('zzz');
needsUpdate = false;
}
Does that work for you?

Define a global variable to hold the input flag
var appended = false;
function appendthestring() {
if(!appended) $('td.pn_adm_jeff').children('div.dtxt').append('zzz');
appended = true;
}

Toggle Mute Javascript Function with Jquery Toggle

Hi All I am trying to write both an if/else statement along with toggling an image. Basically my goal is to toggle an image (in this case with an id of soundonoff). However I can't seem to figure out where I am going wrong. The issue is the toggle works, but the detect of whether its muted or not does not work. (In my full code for example I have it switch innerHTML of various audio/video files, this is where document.getElementsByName('mymedia')[0] comes in. Any help would be tremendously appreciated I have spent about 4 hours working on this and can't seem to figure it out.
I should add that I do not know where to add an eventlistener for detectmute(), I tried to add it to my video, and to the button soundonoff but neither got working yet.
Here is my code:
function detectmute(){
if(document.getElementById('soundonoff').src == 'images/icons/soundoff.png'){
document.getElementsByName('mymedia')[0].muted = true;
}
else if(document.getElementById('soundonoff').src == 'images/icons/soundon.png'){
document.getElementsByName('mymedia')[0].muted = false;
}
$("#soundonoff").toggle(function(){
this.src = "images/icons/soundoff.png";
document.getElementsByName('mymedia')[0].muted = true;
}, function() {
this.src = "images/icons/soundon.png";
document.getElementsByName('mymedia')[0].muted = false;
});
}

Well I solved my own issue, Solution was the following:
$("#soundonoff").toggle(function(){
this.src = "images/icons/soundoff.png";
document.getElementsByName('mymedia')[0].muted = true;
$("#soundonoff").attr('name', 'soundoff');
}, function() {
this.src = "images/icons/soundon.png";
document.getElementsByName('mymedia')[0].muted = false;
$("#soundonoff").attr('name', 'soundon');
});
function detectmute(){
var soundstate = document.getElementById('soundonoff');
if (soundstate.name == "soundon")
{
document.getElementsByName('mymedia')[0].muted = false;
}
else if (soundstate.name == "soundoff")
{
document.getElementsByName('mymedia')[0].muted = true;
}
}

$('#soundonoff').on('click', function () {
var $this = $(this);
if ($this.attr('src') == 'images/icons/soundon.png') {
$this.attr('src', 'images/icons/soundoff.png').attr('data-muted', true);
} else {
$this.attr('src', 'images/icons/soundon.png').attr('data-muted', false);
}
});
Here is a demo: http://jsfiddle.net/jLvZW/3/ updated
You could also setup an object that converts one source to another:
var convert = {
'images/icons/soundon.png' : ['images/icons/soundoff.png', true],
'images/icons/soundoff.png' : ['images/icons/soundon.png', false]
};
$('#soundonoff').on('click', function () {
var $this = $(this);
$this.attr('src', convert[$this.attr('src')][0]).attr('data-muted', convert[$this.attr('src')][1]);
});
Here is a demo: http://jsfiddle.net/jLvZW/2/ Updated

How to detect if some text box is changed via external script?

I have some jQuery plugin that changes some elements, i need some event or jQuery plugin that trigger an event when some text input value changed.
I've downloaded jquery.textchange plugin, it is a good plugin but doesn't detect changes via external source.

#MSS -- Alright, this is a kludge but it works:
When I call boxWatcher() I set the value to 3,000 but you'd need to do it much more often, like maybe 100 or 300.
http://jsfiddle.net/N9zBA/8/
var theOldContent = $('#theID').val().trim();
var theNewContent = "";
function boxWatcher(milSecondsBetweenChecks) {
var theLoop = setInterval(function() {
theNewContent = $('#theID').val().trim();
if (theOldContent == theNewContent) {
return; //no change
}
clearInterval(theLoop);//stop looping
handleContentChange();
}, milSecondsBetweenChecks);
};
function handleContentChange() {
alert('content has changed');
//restart boxWatcher
theOldContent = theNewContent;//reset theOldContent
boxWatcher(3000);//3000 is about 3 seconds
}
function buttonClick() {
$('#theID').value = 'asd;lfikjasd;fkj';
}
$(document).ready(function() {
boxWatcher(3000);
})

try to set the old value into a global variable then fire onkeypress event on your text input and compare between old and new values of it. some thing like that
var oldvlaue = $('#myInput').val();
$('#myInput').keyup(function(){
if(oldvlaue!=$('#myInput').val().trim())
{
alert('text has been changed');
}
});
you test this example here
Edit
try to add an EventListner to your text input, I don't know more about it but you can check this Post it may help

Thanks to #Darin because of his/her solution I've marked as the answer, but i have made some small jQuery plugin to achieve the same work named 'txtChgMon'.
(function ($) {
$.fn.txtChgMon = function (func) {
var res = this.each(function () {
txts[0] = { t: this, f: func, oldT: $(this).val(), newT: '' };
});
if (!watchStarted) {
boxWatcher(200);
}
return res;
};
})(jQuery);
var txts = [];
var watchStarted = false;
function boxWatcher(milSecondsBetweenChecks) {
watchStarted = true;
var theLoop = setInterval(function () {
for (var i = 0; i < txts.length; i++) {
txts[i].newT = $(txts[i].t).val();
if (txts[i].newT == txts[i].oldT) {
return; //no change
}
clearInterval(theLoop); //stop looping
txts[i].f(txts[i], txts[i].oldT, txts[i].newT);
txts[i].oldT = $(txts[i].t).val();
boxWatcher(milSecondsBetweenChecks);
return;
}
}, milSecondsBetweenChecks);
}

setInterval with other jQuery events - Too many recursions

I'm trying to build a Javascript listener for a small page that uses AJAX to load content based on the anchor in the URL. Looking online, I found and modified a script that uses setInterval() to do this and so far it works fine. However, I have other jQuery elements in the $(document).ready() for special effects for the menus and content. If I use setInterval() no other jQuery effects work. I finagled a way to get it work by including the jQuery effects in the loop for setInterval() like so:
$(document).ready(function() {
var pageScripts = function() {
pageEffects();
pageURL();
}
window.setInterval(pageScripts, 500);
});
var currentAnchor = null;
function pageEffects() {
// Popup Menus
$(".bannerMenu").hover(function() {
$(this).find("ul.bannerSubmenu").slideDown(300).show;
}, function() {
$(this).find("ul.bannerSubmenu").slideUp(400);
});
$(".panel").hover(function() {
$(this).find(".panelContent").fadeIn(200);
}, function() {
$(this).find(".panelContent").fadeOut(300);
});
// REL Links Control
$("a[rel='_blank']").click(function() {
this.target = "_blank";
});
$("a[rel='share']").click(function(event) {
var share_url = $(this).attr("href");
window.open(share_url, "Share", "width=768, height=450");
event.preventDefault();
});
}
function pageURL() {
if (currentAnchor != document.location.hash) {
currentAnchor = document.location.hash;
if (!currentAnchor) {
query = "section=home";
} else {
var splits = currentAnchor.substring(1).split("&");
var section = splits[0];
delete splits[0];
var params = splits.join("&");
var query = "section=" + section + params;
}
$.get("loader.php", query, function(data) {
$("#load").fadeIn("fast");
$("#content").fadeOut(100).html(data).fadeIn(500);
$("#load").fadeOut("fast");
});
}
}
This works fine for a while but after a few minutes of the page being loaded, it drags to a near stop in IE and Firefox. I checked the FF Error Console and it comes back with an error "Too many Recursions." Chrome seems to not care and the page continues to run more or less normally despite the amount of time it's been open.
It would seem to me that the pageEffects() call is causing the issue with the recursion, however, any attempts to move it out of the loop breaks them and they cease to work as soon as setInterval makes it first loop.
Any help on this would be greatly appreciated!

I am guessing that the pageEffects need added to the pageURL content.
At the very least this should be more efficient and prevent duplicate handlers
$(document).ready(function() {
pageEffects($('body'));
(function(){
pageURL();
window.setTimeout(arguments.callee, 500);
})();
});
var currentAnchor = null;
function pageEffects(parent) {
// Popup Menus
parent.find(".bannerMenu").each(function() {
$(this).unbind('mouseenter mouseleave');
var proxy = {
subMenu: $(this).find("ul.bannerSubmenu"),
handlerIn: function() {
this.subMenu.slideDown(300).show();
},
handlerOut: function() {
this.subMenu.slideUp(400).hide();
}
};
$(this).hover(proxy.handlerIn, proxy.handlerOut);
});
parent.find(".panel").each(function() {
$(this).unbind('mouseenter mouseleave');
var proxy = {
content: panel.find(".panelContent"),
handlerIn: function() {
this.content.fadeIn(200).show();
},
handlerOut: function() {
this.content.slideUp(400).hide();
}
};
$(this).hover(proxy.handlerIn, proxy.handlerOut);
});
// REL Links Control
parent.find("a[rel='_blank']").each(function() {
$(this).target = "_blank";
});
parent.find("a[rel='share']").click(function(event) {
var share_url = $(this).attr("href");
window.open(share_url, "Share", "width=768, height=450");
event.preventDefault();
});
}
function pageURL() {
if (currentAnchor != document.location.hash) {
currentAnchor = document.location.hash;
if (!currentAnchor) {
query = "section=home";
} else {
var splits = currentAnchor.substring(1).split("&");
var section = splits[0];
delete splits[0];
var params = splits.join("&");
var query = "section=" + section + params;
}
var content = $("#content");
$.get("loader.php", query, function(data) {
$("#load").fadeIn("fast");
content.fadeOut(100).html(data).fadeIn(500);
$("#load").fadeOut("fast");
});
pageEffects(content);
}
}

Thanks for the suggestions. I tried a few of them and they still did not lead to the desirable effects. After some cautious testing, I found out what was happening. With jQuery (and presumably Javascript as a whole), whenever an AJAX callback is made, the elements brought in through the callback are not binded to what was originally binded in the document, they must be rebinded. You can either do this by recalling all the jQuery events on a successful callback or by using the .live() event in jQuery's library. I opted for .live() and it works like a charm now and no more recursive errors :D.
$(document).ready(function() {
// Popup Menus
$(".bannerMenu").live("hover", function(event) {
if (event.type == "mouseover") {
$(this).find("ul.bannerSubmenu").slideDown(300);
} else {
$(this).find("ul.bannerSubmenu").slideUp(400);
}
});
// Rollover Content
$(".panel").live("hover", function(event) {
if (event.type == "mouseover") {
$(this).find(".panelContent").fadeIn(200);
} else {
$(this).find(".panelContent").fadeOut(300);
}
});
// HREF Events
$("a[rel='_blank']").live("click", function(event) {
var target = $(this).attr("href");
window.open(target, "_blank");
event.preventDefault();
});
$("a[rel='share']").live("click", function(event) {
var share_url = $(this).attr("href");
window.open(share_url, "Share", "width=768, height=450");
event.preventDefault();
});
setInterval("checkAnchor()", 500);
});
var currentAnchor = null;
function checkAnchor() {
if (currentAnchor != document.location.hash) {
currentAnchor = document.location.hash;
if (!currentAnchor) {
query = "section=home";
} else {
var splits = currentAnchor.substring(1).split("&");
var section = splits[0];
delete splits[0];
var params = splits.join("&");
var query = "section=" + section + params;
}
$.get("loader.php", query, function(data) {
$("#load").fadeIn(200);
$("#content").fadeOut(200).html(data).fadeIn(200);
$("#load").fadeOut(200);
});
}
}
Anywho, the page works as intended even in IE (which I rarely check for compatibility). Hopefully, some other newb will learn from my mistakes :p.