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How to use each() with mouseenter, mouseover and data attributes right

I have a block which has some data attributes:
<div class="my-div" data-color="#ff4b4b" data-hover="#000">
Text
</div>
Now I want to use javascript for changing text color on mouseenter and mouseover using my data attributes.
So I have:
$(".my-div").each(function() {
$(this).mouseenter(function() {
$(this).css('color', this.dataset.hover);
});
$(this).mouseleave(function() {
$(this).css('color', this.dataset.color);
});
});
If I have one div, it's working fine, but if I have another divs with the same class, and I mouseenter and mouseover one div, another divs react too.
What should I do to make it working right, maybe add an index, I don't know.
Can you help me, please?
Thanks in advance. Sorry for my English.
P.S. Don't advise css, for this I must use javascript.

Your code should work by itself but you don't need to loop through each div to check if the mouse has entered or left each div element - it's extremely inefficient.
So remove:
$(".my-div").each(function() {});
Your new code should look like the following:
$(".my-div").mouseenter(function() {
$(this).css('color', this.dataset.hover);
});
$(".my-div").mouseleave(function() {
$(this).css('color', this.dataset.color);
});
.my-div {
position: relative;
display: inline-block;
width: 100px;
height: 100px;
color: #ff4b4b;
border: 1px solid #000000;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="my-div" data-color="#ff4b4b" data-hover="#000">
Text
</div>
<div class="my-div" data-color="#ff4b4b" data-hover="#000">
Text
</div>
<div class="my-div" data-color="#ff4b4b" data-hover="#000">
Text
</div>
Obviously the CSS isn't necessary but I have added it to prove that it works correctly.

Get the target element of the event passed into each handler using $(this):
$(".my-div").each(function() {
$(this).mouseenter(function(e) {
$(this).css('color', this.dataset.hover);
});
$(this).mouseleave(function(e) {
$(this).css('color', this.dataset.color);
});
});
.my-div{
font-size: 20px;
line-height: 25px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="my-div" data-color="black" data-hover="red">
Text 1
</div>
<div class="my-div" data-color="black" data-hover="green">
Text 2
</div>
<div class="my-div" data-color="black" data-hover="blue">
Text 3
</div>

Closing all other DIVS while opening one

What I am trying to achieve is the following
There are two DIVS with dropdown. I need to close one while opening the other on click function.
I am also trying to mouseout once the event is out of the dropdown box.
I would like to close the DIV once the click even happens outside the dropdown box.
Following is the HTML
<div class="first-div" style="display:inline-block">
<a class="first-div-link"><h6>REGION</h6></a>
<div class="first-div-dropdown">
<p>Drop down test from first DIV</p>
</div>
</div>
<div id="second-div" style="display:inline-block; float:right">
<h6>REGISTER</h6>
<div class="second-div-dropdown">
<p>Drop down test from second DIV</p>
</div>
</div>
CSS is following
.first-div-dropdown, .second-div-dropdown{
background-color:#555;
color:white;
height:100px;
width:200px;
}
JS is following
$(document).ready(function(){
$('.first-div-dropdown').hide();
$('.second-div-dropdown').hide();
$('.first-div-link').on('click', function (event){
$('.first-div-dropdown').slideDown(300);
});
$('.second-div-link').on('click', function (event){
$('.second-div-dropdown').slideDown(300);
});
});
Is there any way to use this as a function to control multiple DOMs in the HTML? If so could someone assist me with the current example ?
Thanks

The path to follow here is use a common class on your items, you don't need to create new classnames if all will have the same styles and will perform the same action. Check this:
$(document).ready(function() {
$('.cont-div').on('click', 'a', function(e) {
e.preventDefault();
$('.div-dropdown').slideUp(300);
$(this).next('.div-dropdown').stop().slideToggle(300);
});
//To close if you click outside the container divs
$('body').on('click', function(e) {
if (!$(e.target).parents('.cont-div').length) {
$('.div-dropdown').slideUp(300);
}
})
});
body {
height: 600px;
background: #e1e1e1;
}
.cont-div {
display: inline-block;
vertical-align: top;
width: 50%;
}
.div-dropdown {
background-color: #555;
color: white;
height: 100px;
width: 200px;
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="cont-div">
<h6>REGION</h6>
<div class="div-dropdown">
<p>Drop down test from first DIV</p>
</div>
</div><!--
--><div class="cont-div">
<h6>REGISTER</h6>
<div class="div-dropdown">
<p>Drop down test from second DIV</p>
</div>
</div>

If you want to get more specific, you could assign a similar class to both menus, in the case below, I added 'dropdown-div' to the class for both menus and then simply added a trigger whenever you click on something that is not a link, it will hide the menus by calling $('.dropdown-div').hide();
$(document).ready(function(){
$('.first-div-dropdown').hide();
$('.second-div-dropdown').hide();
$('.first-div-link').on('click', function (event){
$('.first-div-dropdown').slideDown(300);
});
$('.second-div-link').on('click', function (event){
$('.second-div-dropdown').slideDown(300);
});
});
$(document).on('click', function(event) {
if (!$(event.target).closest('a').length) {
$(".dropdown-div").hide();
}
});
.first-div-dropdown, .second-div-dropdown{
background-color:#555;
color:white;
height:100px;
width:200px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="first-div " style="display:inline-block">
<a class="first-div-link"><h6>REGION</h6></a>
<div class="first-div-dropdown dropdown-div">
<p>Drop down test from first DIV</p>
</div>
</div>
<div id="second-div" style="display:inline-block; float:right">
<h6>REGISTER</h6>
<div class="second-div-dropdown dropdown-div">
<p>Drop down test from second DIV</p>
</div>
</div>

You're dealing with state management within a collection. You have 2 dropdowns, but 3 states: dropdown one's state, dropdown two's state, and the collection of dropdowns' state.
Using jQuery, the most common way of handling this I've seen is to start by "resetting" the collection's state each time, by hiding all dropdowns on click.
Then, open the dropdown that is being targeted by the client. This can also be a bit easier if you use a single class to target the collection which also lends itself to be reusable across an infinite number of dropdowns.
<div class="first-div" style="display:inline-block">
<a class="dropdown-trigger"><h6>REGION</h6></a>
<div class="dropdown-menu">
<p>Drop down test from first DIV</p>
</div>
</div>
<div id="second-div" style="display:inline-block; float:right">
<a class="dropdown-trigger"><h6>REGION</h6></a>
<div class="dropdown-menu">
<p>Drop down test from second DIV</p>
</div>
</div>
JS:
$('.dropdown-trigger').click(function (event) {
event.stopPropagation();
var $menu = $(this).siblings('.dropdown-menu');
$('.dropdown-menu').not($menu).slideUp(300);
$menu.slideToggle(300);
});
$(document).click(closeDropdowns);
function closeDropdowns () {
$('.dropdown-menu').slideUp(300);
}
Working codepen: http://codepen.io/amishstripclub/pen/wzbEVo

You could try using toggle like this:
$(document).ready(function(){
$('.first-div-link').on('click', function (event){
$('.first-div-dropdown').toggle();
$('.second-div-dropdown').toggle();
});
$('.second-div-link').on('click', function (event){
$('.first-div-dropdown').toggle();
$('.second-div-dropdown').toggle();
});
});

Find an element with a class in jquery

I have a scenario where I've multiple div with class navToME on/off. Now what I've trying to do here is if a div has a class off, then remove the class navToMe.
E.g.,
if($('.navToME').hasClass('off')){
$('.off').removeClass('navToME');
}
My HTML structure is like this:
<div class="on navToME">
<strong>ABC</strong>
</div>
<div class="off navToME">
<strong>DEF</strong>
</div>
What's happening right now is it just checks the first div with that class and returns false. Is there a way anyone can suggest so that I could just this for all classes inside my HTML? Thanks in advance!

You can simply use Class Selector to identify element with multiple class then use removeClass()
$('.off.navToME').removeClass('navToME');
$(function() {
$('.off.navToME').removeClass('navToME');
});
.on {
background-color: green;
}
.off {
background-color: red;
}
.navToME {
background-color: grey!important;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="on navToME">
<strong>ABC</strong>
</div>
<div class="off navToME">
<strong>DEF</strong>
</div>

Run JS by clicking a div element

Im working on a website that has a few different colored boxes made with divs, and I want to use them to open certain things. Whether it be music, photos, etc. Im using JS to generate a random number and use the number to choose which song to open, but I have no clue how to attach it to the div itself.
</head>
<body style="background-color:#FFF;">
<div id="center">
<div id="header">
<div id="title"><h1>welcom3 :-)</h1></div>
<div id="wrapper">
<div id="redbox">
</div>
<div id="6box">
</div>
<div id="bluebox">
</div>
<div id="greenbox">
</div>
<div id="yellowbox">
</div>
<div id="yellowboxmargin">
</div>
<div id="yellowboxmargin">
</div>
<div id="yellowboxmargin">
</div>
</div>
</div>
</body>
</html>

use jQuery
<div id="box1"></div>
<script>
$(document).ready(function() {
$("#box1").click(function(){
yourfunc();
}
})
</script>

If you need run js code without jquery, use this example.
In head:
<script>
function hello() {
// do something
}
</script>
In body:
<div onclick="hello()">Hello</div>

I would follow the advice of Buddhi Abeyratne and use jQuery. Of course, this is just a guess, but I would say that due to the nature of your project, it will make things easier for you.
jQuery has different methods to attach events to an alement. In this case, you can use the shortcut ".click()".
I leave you here a snippet:
function do_something_cool(box)
{
alert("I have code to make something awesome with " + box.attr("id"));
}
$(document).ready(function()
{
$("#wrapper div").click(function() { do_something_cool($(this)); });
});
body
{
background-color: #FFF;
}
.colored_box
{
height: 50px;
width: 50px;
margin: 5px;
}
#redbox
{
background-color: red;
}
#bluebox
{
background-color: blue;
}
#greenbox
{
background-color: green;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<div id="center">
<div id="header">
<div id="title"><h1>welcom3 :-)</h1></div>
<div id="wrapper">
<div id="redbox" class="colored_box"></div>
<div id="bluebox" class="colored_box"></div>
<div id="greenbox" class="colored_box"></div>
</div>
</div>
</div>
</body>
But if you decide to don't use jQuery, here you have the vanilla javascript:
window.onload = function()
{
var boxes = document.getElementById("wrapper").getElementsByTagName("div");
for (var i = 0; i < boxes.length; i++)
{
boxes[i].addEventListener("click", do_something_cool);
}
}
function do_something_cool(evt)
{
alert("I have code to make something awesome with " + evt.target.id);
}
Btw, I guess it is just a copy/paste thing, but you forgot to close one div.
Also, pay attention to how I have separated html, js and css in the snippet. You should avoid inline js and css.
Good luck!

How can I get outer div target with event.target?

I'm making web service with javascript (and jQuery), and I'm trying to make custom menu.
But the main point is "Widget's ID which is clicked by user".
I want to return widget's id (like widget1 or widget2),
even if user pressed inner objects (img, textarea, etc.)
I tried event.target.id but it returns inner object's id, not outer div.
How could I solve this problem?
JavaScript and HTML :
$("#wrapper_widgets").bind("contextmenu", function(event) {
event.preventDefault();
alert(event.target.id);
});
<div id="wrapper_widgets">
<div id="widget1">
<img src="blablabla.png">
<textarea id="widget1_textarea">blablabla</textarea>
</div>
<div id="widget2" style="border: 1px solid blue; width: 500px; height: 100px;">
<p id="widget2_timedoc">asdasdasd</p>
</div>
</div>

The problem is event.target will refer to the element from which the event was originated from, so you will have to find the closest ancestor widget element
One easy solution is to use a class to all the widgets and target it
<div id="wrapper_widgets">
<div id="widget1" class="widget">
<img src="blablabla.png">
<textarea id="widget1_textarea">blablabla</textarea>
</div>
<div id="widget2" class="widget" style="border: 1px solid blue; width: 500px; height: 100px;">
<p id="widget2_timedoc">asdasdasd</p>
</div>
</div>
then
$("#wrapper_widgets").on("contextmenu", '.widget', function (event) {
event.preventDefault();
alert(this.id);
});
or
$("#wrapper_widgets").bind("contextmenu", function(event) {
event.preventDefault();
alert($(event.target).closest('.widget').attr('id'));
});

You can use .closest('div') with .prop() to get the immediate ancestor ID.
$(event.target).closest('div').prop('id')
Note : This would work only if there is no further nesting of <div>s inside wrappers.
$("#wrapper_widgets").bind("contextmenu", function (event) {
event.preventDefault();
alert($(event.target).closest('div').prop('id'));
});
$("#wrapper_widgets").bind("contextmenu", function (event) {
event.preventDefault();
alert($(event.target).closest('div').prop('id'));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="wrapper_widgets">
<div id="widget1">
<img src="blablabla.png">
<textarea id="widget1_textarea">blablabla</textarea>
</div>
<div id="widget2" style="border: 1px solid blue; width: 500px; height: 100px;">
<p id="widget2_timedoc">asdasdasd</p>
</div>
</div>

In the event function use
$(this).parent().prop('id')
to get the immediate parent's id of the clicked element. This will always return the immediate parent and not necessarily only divs but in your case it will work and return 'widget1' or 'widget2'.