Develop Reference

jQuery checkbox trigger change not working

I have the following JS function:
const bindSwitches = function() {
$(document).on("click", ".lever", function() {
var checkbox = $(this).siblings("input[type=checkbox]");
var hiddenField = $(this).siblings("input[type=hidden]");
if (checkbox.prop("checked") === true) {
checkbox.prop("value", 0);
hiddenField.prop("value", 0);
} else if (checkbox.prop("checked") === false) {
checkbox.prop("value", 1);
hiddenField.prop("value", 1);
}
$(checkbox).trigger("change");
});
};
It interacts with a switch component provided by the Materialize library. I have just added the final line, as there is some behaviour that needs to occur whenever a checkbox is triggered. But that change event never fires. I also have this function in my app:
const bindAllChecks = function() {
$(document).on("change", ".select-all-check", function() {
var checks = $(this).closest(".table, table").find(".multiple-check:visible");
if (this.checked) {
$.each( checks, function( index, checkbox ){
if ($(checkbox).prop("checked") === false) {
$(checkbox).prop("checked", true);
$(checkbox).trigger("change");
}
});
} else {
$.each( checks, function( index, checkbox ){
if ($(checkbox).prop("checked") === true) {
$(checkbox).prop("checked", false);
$(checkbox).trigger("change");
}
});
}
});
};
Notice how I use the exact same $(checkbox).trigger("change"). In this function it works perfectly.
I've tried changing the order in which I bind the events, to make sure the change event is definitely defined beforehand. I've made sure that the rest of the function is being triggered correctly and that there are no issues in that regard. I've also tried different variations of alternative syntax, nothing has worked.
Here is the code it is supposed to trigger:
const bindCheckboxOverride = function() {
$(document).on("change", ".checkbox-collection input[type=checkbox]:not(.select-all-check)", function() {
var hiddenField = $(this).prev();
if(hiddenField.attr("disabled") === "disabled") {
hiddenField.removeAttr("disabled");
} else {
hiddenField.attr("disabled", "disabled");
}
});
};

I still don't have an exact solution to the question I asked, but I have come up with an alternate method. Instead of trying the trigger a change, I have pulled out the functionality I want from the change even into its own function:
const bindCheckboxOverride = function() {
$(document).on("change", ".checkbox-collection input[type=checkbox]:not(.select-all-check)", function() {
handleCheckboxDisable(this);
});
};
const handleCheckboxDisable = function(checkbox) {
var hiddenField = $(checkbox).prev();
if(hiddenField.attr("disabled") === "disabled") {
hiddenField.removeAttr("disabled");
} else {
hiddenField.attr("disabled", "disabled");
}
};
So now I'm able to call this function directly from my other function:
const bindSwitches = function() {
$(document).on("click", ".lever", function() {
var checkbox = $(this).siblings("input[type=checkbox]");
var hiddenField = $(this).siblings("input[type=hidden]");
if (checkbox.prop("checked") === true) {
checkbox.prop("value", 0);
hiddenField.prop("value", 0);
} else if (checkbox.prop("checked") === false) {
checkbox.prop("value", 1);
hiddenField.prop("value", 1);
}
handleCheckboxDisable(checkbox);
});
};
It doesn't answer the question but I thought that may be of help to somebody. Would still like to know why the original code doesn't work if anybody has any insights.

Kendo Menu selection issue

I've a kendo menu to dynamically enable or disable the kendo grid columns. When I select the options from the KendoMenu, the selection is firing twice. I've created the demo version below.
demo
$("#menu").kendoMenu({
dataSource: [{
text: "Menu",
items: ds
}],
openOnClick: true,
closeOnClick: false,
open: function () {
var selector;
$.each(grid.columns, function () {
if (this.hidden) {
selector = "input[data-field='" + this.field + "']";
$(selector).prop("checked", false);
}
});
},
select: function (e) {
// don't show/hide for menu button --- calling twice
if ($(e.item).parent().filter("div").length) return;
console.log("******");
var input = $(e.item).find("input.check");
var field = $(input).data("field");
if ($(input).is(":checked")) {
grid.showColumn(field);
} else {
grid.hideColumn(field);
}
}});
Check the console log while selecting the menu items.

Adding the checkbox to the menu item seems to lead to kendo firing the event for the menu click and the checkbox check. It seems hard to differentiate between the two instances, so it might be better to do something different to indicate the check. The following icons can be used - maybe use the tick icon instead of an actual checkbox:
http://demos.telerik.com/kendo-ui/styling/icons

I've fixed the issue with the updated code
$("#menu").kendoMenu({
dataSource: [{
text: "Menu",
items: ds
}],
openOnClick: true,
closeOnClick: false,
open: function () {
var selector;
$.each(grid.columns, function () {
if (this.hidden) {
selector = "input[data-field='" + this.field + "']";
$(selector).prop("checked", false);
}
});
},
select: function (e) {
// don't show/hide for menu button
if ($(e.item).parent().filter("div").length) return;
var removeItemFlag = false;
var input = $(e.item).find("label");
var selectedValue = input[0].innerHTML;
if(selectedValue)
{
for(var i=0; i< droplist.length; i++){
if(droplist[i] === selectedValue){
removeItemFlag = true
input[0].classList.remove = "fa fa-check-square-o";
input[0].className = "fa fa-square-o";
break;
}
}
var selectedIndex = droplist.indexOf(selectedValue);
if (selectedIndex > -1 && removeItemFlag) {
droplist.splice(selectedIndex, 1);
grid.hideColumn(selectedValue);
}else{
droplist.push(selectedValue);
grid.showColumn(selectedValue);
input[0].className = "fa fa-check-square-o";
}
}
}
});

Changing required field dynamicly via JS in Contact Form 7

I need to write custom validated form in Wordpress. After the click on For-Author radio button some checkboxes group should be marked as not required. I tried to change "aria-required" attributes to "false" or remove and add class "wpcf7-validates-as-required" but it doesn't work. I also tried to reinit wpcf7 by
$('div.wpcf7 > form').wpcf7InitForm();
but it's also doesn't work.
This is a code sample:
$radio.button.click(function (event) {
isAuthor(event)
});
var isAuthor = function (event) {
if ($(event.target).attr('data-author') == 'true') {
authorClicked = true;
} else {
authorClicked = false;
}
fieldUpdate();
};
var fieldUpdate = function () {
var $text = $('[name=pres-title]');
if (authorClicked) {
$text.prop('disabled', false).attr('aria-required', true).addClass('wpcf7-validates-as-required').attr('aria-invalid', false)
$fieldRequired.each(function () {
$(this).prop('disabled', false).attr('aria-required', true).addClass('wpcf7-validates-as-required').attr('aria-invalid', false);
});
} else {
$text.prop('disabled', true).attr('aria-required', false).removeClass('wpcf7-validates-as-required').attr('aria-invalid', false);
$fieldRequired.each(function () {
$(this).prop('disabled', true).attr('aria-required', false).removeClass('wpcf7-validates-as-required').attr('aria-invalid', false);
});
}
}

click multiple elements to hide or show something - jquery

here is my script. Now i can click one of these IDs and class "inputs" are visible. What i want is that I have to click on all elements.
$('#zwei,#sechs,#neun').bind('click', function() {
if( $(this).is(':checked')) {
$('.inputs').show();
} else {
$('.inputs').hide();
}
});
JSFiddle:
http://jsfiddle.net/CLYC6/20/
can you help me please? whats wrong?
FK

Use this:
$('#zwei,#sechs,#neun').bind('click', function() {
$('.inputs').show();
$('#zwei,#sechs,#neun').each(function (e) {
if (!$(this).is(':checked')) {
$('.inputs').hide();
return;
}
});
});
Here is a LIVE DEMO.
Because #Rastko is not happy with the current solution here is one more:
$('#zwei,#sechs,#neun').bind('click', function() {
var showInput = true;
$('#zwei,#sechs,#neun').each(function (e) {
if (!$(this).is(':checked')) {
showInput = false;
return;
}
});
if (showInput) {
$('.inputs').show();
} else {
$('.inputs').hide();
}
});
One more LIVE DEMO.

If statement should check whether all three are checked, and if input is not visible.
so:
if($('#zvei').is(':checked') && $('#neun').is(':checked') && $('#sechs').is(':checked') {
$('.inputs').show();
}

Events being bound twice or more jquery

I'm trying to generate html on the fly with javascript. I'm binding on the click of buttons on my page. There are multiple buttons on my page which are causing my elements to be bound multiple times which produces the desired results to appear in the amount of times the button has been clicked.
My question is there something that can check if a element is already bound in jquery? If so, how do I incorporate that with the .live() function in jquery.
Here is my code:
$(document).ready(
function () {
$(':button').live("click", ".textbox, :button", function () {
alert("binding");
$(".textbox").click(function () {
defaultVal = this.defaultValue;
if (this.defaultValue) {
this.value = "";
}
});
$(".textbox").blur(function () {
if (this.value == "") {
this.value = defaultVal;
}
});
$('[name="numsets"]').blur(function () {
if (!parseInt(this.value)) {
$(this).val("you need to enter a number");
}
});
$('[name="weightrepbutton"]').click(function () {
var $numsets = $(this).parent().children('[name="numsets"]');
if ($numsets.val() != "you need to enter a number" && $numsets.val() != "Number of Sets") {
var numbersets = parseInt($numsets.val())
repandweight.call(this, numbersets)
$(this).hide();
$numsets.hide();
}
})
});
});
The problem is line 4, every time a button is clicked, all functions that were previous bound seem to be bound to the same function twice, which is a problem.
Thanks for the help!

You are doing it twice ! One inside another. Take out the outer binding and it should work
$(document).ready(function () {
$(document).on("click",".textbox",function () {
defaultVal = this.defaultValue;
if (this.defaultValue) {
this.value = "";
}
});
$(document).on("blur",".textbox",function () {
var item=$(this);
if (item.val() == "") {
item.val(defaultVal);
}
});
$(document).on("blur","input[name='numsets']",function () {
var item=$(this);
if (!parseInt(item.val())) {
item.val("you need to enter a number");
}
});
$(document).on("click","input[name='weightrepbutton']",function () {
var $numsets = $(this).parent().children('[name="numsets"]');
if ($numsets.val() != "you need to enter a number" && $numsets.val() != "Number of Sets") {
var numbersets = parseInt($numsets.val())
repandweight.call(this, numbersets)
$(this).hide();
$numsets.hide();
}
})
});
if you are using jQuery 1.7+ version, consider switching to jQuery on instead of live.
EDIT: Updated live to on as OP mentioned it in the comment.