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Group similar jquery click events together

I'm trying to group together jQuery click events for similar elements. Basically, I have the main div I want to add new classes to when a particular button is clicked. So I have
<div class="main"></div>
and I want to add new classes to that div depending on a few buttons I have
<div class="triggers">
<div class="changer" id="blue">Blue</div>
<div class="changer" id="red">Red</div>
<div class="changer" id="green">Green</div>
</div>
So I have the classes made up in CSS and then of course add them to the main div based on each of those buttons ID's being clicked
$(document).ready(function(){
$('#blue').click(function() {
$(".main").addClass("blue").delay(500).queue(function(){
$(this).removeClass("blue").dequeue();
});
});
$('#red').click(function() {
$(".main").addClass("red").delay(500).queue(function(){
$(this).removeClass("red").dequeue();
});
});
$('#green').click(function() {
$(".main").addClass("green").delay(500).queue(function(){
$(this).removeClass("green").dequeue();
});
});
});
My question is how can I go about grouping these click events together so that I'm not repeating the same code block over and over again based on each button's ID?

Register the click event on the common class, then grab the id which is the colour?
$(".changer").click(function() {
let colour = String($(this).attr("id"));
if (colour) {
$(".main").addClass(colour).delay(500).queue(function(){
$(this).removeClass(colour).dequeue();
});
}
})

How to make HTML text hidden until clicked on

I'm trying to learn how to make HTML text toggle with jQuery, which is pretty easy in itself, but I want the text to be hidden automatically until it is clicked on with a button. I've looked it up and I can't find how to do this. I figured it should be easy, and I have this part
<h4 id="text1">This is some toggleable text</h4>
$(document).ready(function(){
$("#button1").click(function(){
$("#text1").toggle();
});
});
Which works fine as a regular toggle, but this leaves the text there until first clicked on.
Codepen: https://codepen.io/anon/pen/bYYeEB

The jQuery show,hide and toggle functions simply alter the CSS display property to have either display: block; or display: none;.
To start with your element hidden just set the style attribute style="display:none;".

$(document).ready(
function(){
$("#button1").click(toggle);
}
);
function toggle() {
$("#text1").toggle();
}
toggle();
Calling toggle at the bottom will auto hide the element. This still isn't the greatest since the element will show until this code runs.
But you can always change the HTML to read like this:
<h4 id="text1" style="display:none">This is some toggleable text</h4>
Then you don't need to call toggle the first time.

<script>
$(document).ready(function() {
$("#text1").css("display", "none");//you just have to add this line
$("#button1").click(function() {
$("#text1").toggle();
});
});
</script>

Insert div id into script

I have a script where clicking on a particular div (eg id=packtoa) will (amongst other things) .addclass('show') to listview items with a class which matches the id of the div clicked.
Which works great, but then I'll want the next div (id=packfhag) to do the same thing, and then the next one. So I've got the same script many times in my js with just the id & class name changed.
I'm sure there's a stupidly obvious way to automate this so that any div with an id starting with "pack" will trigger this script, pull the div id, and insert it into the script where the name of the class is called.
And I'm sure I'm close with trying to adapt this script:
$("div[id^=pack]").each(function() {
var match = this.id.match(/\w+$/)[0];
$(this).addClass('show');
});
But I just can't crack it. Either something above is wrong, or I'm inserting it into the wrong place in the script:
// Tears of Ameratsu menu functions
$(document).bind('pageinit', function() {
// When link is clicked
$('#packtoa').click(function() {
// collapse the expansions menu
$("#expansionsmenu").click();
// hide everything except this expansion
$(".hidden").removeClass('show');
$(".packtoa").addClass('show');
// clear the search, and trigger a blank search
$('input[data-type="search"]').val('');
$('input[data-type="search"]').trigger("keyup");
});
});
What am I missing?

// for selecting div which starts with pack
// not recommended
$("div[id^='pack']");
The best option is to use class attribute, add class attribute to all those div, and then
$('.commonClass').addClass('show');
For Example :
// this is for testing
// say you click
$('#test').on('click',function(){
$('.testclass').addClass('show');
});
.testclass{
display:none;
}
.show {
display:block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="testclass">div1</div>
<div class="testclass">div2</div>
<div class="testclass">div3</div>
<input type='button' value='Click me to view div' id='test' />

Hiding and showing divs when the amount of divs is unknown

I have a page with multiple posts divs and have a hidden comment form for each post. What is the best way to utilize JQuery/JavaScript to display only the comment form for that post after a button or link is clicked.
<div class="post">
<p>Some Content</p>
Comment
<div class="commentForm" style="display:none"></div>
<div>

$('.commentButton').on('click', function(){
$(this).next().slideToggle();
});
Delegate the click event to the commentButton which should toggle the commentForm. Inside of the event, move to the next element, and perform a slideToggle(). In this way, clicking on the comment button will both show and hide only the next one.
Further to the point, if you wish to hide all other commentForms so only 1 is open at a time, you can simply add:
$('.commentForm').hide();
before you perform the .slideToggle().

put id in your div
<div class="commentForm" id="myID" style="display:none"></div>
now in script
if(someCondition) {
document.getElementById('myID').style.display = 'hidden';
}else {
document.getElementById('myID').style.display = 'visible';
}

next() might not always be working because many times an element is not after the button (that triggers the action) itself.
If that is the case you can do the following:
$('.commentButton').on('click', function(){
$(this).parents('.post:eq(0)').find('.commentForm(0)').show();
// or: fadeIn(500); / fadeOut(500);
// or: slideToggle(); / slideUp(); / slideDown();
// or: css('display, 'block'); / none
});
This will find it's first parent with the class post and than the element inside it with the class commentForm even if its inside another element or in another etc.
In the example of yours you dont nescesaraly need it, but think of just selecting elements that do not have any classes or IDs :)

jquery specific show buttons on hover

I have an application creating a bunch of divs through a loop.
Each div has the class "product"
so it looks like
<div class="product">
!.....stuff here ....!
<div class="show_on_hover">...buttons here... </div>
</div>
so there are about 12 of these same divs per page.
I would like to hover over a specific one and show the specific "show_on_hover" div which is initially set to display:none.
$('.product').hover(function() {
$(.show_on_hover).show();
},
function () {
$(.show_on_hover).hide();
}
);
That is what I have so far but it will show ALL of the .show_on_hovers on the page so I am wondering how to get only the specific one you have moused over to show. This effect is seen on youtube when you mouseover any of the comments, and some comment tools pop up.
Thanks!

find will find your .show_on_hover divs inside the hovered .product. Try this:
$('.product').hover(function() {
$(this).find('.show_on_hover').show();
},
function () {
$(this).find('.show_on_hover').hide();
}
);

Try
$('.show_on_hover', this).show()/.hide()
Adding the second param to the jQuery function will constrain the search to be inside that element. In this case this will be the div that is clicked on.