Develop Reference

How to center div apparently inside canvas?

I'm making a snake game with JavaScript and I'm trying to add the 'pause menu' feature. I manage to make the menu appear when the user clicks the pause icon, but I wish I could make the menu appear centered inside the canvas where the game is rendered. This is what I got:
How can I make it look like it is centered inside the canvas? I know I can accomplish that by setting the margin-left, margin-right, etc to a certain number, but that doesn't work well in my case because my website is supposed to be responsive to window resize. I want that menu to maintain almost the same dimensions whatever is the width of the window. Here is the HTML:
<div class="body-divs">
<div id="score-div">
<span id="score-text"></span>
<span id="level-text"></span>
<button id="pause-button"><i id="pause-resume-icon" class="fa fa-pause" aria-hidden="true"></i></button>
</div>
<div id="pause-menu">
<span class="menu-text"> Paused </span>
<div id="game-menu-div-4">
<button class="game-menu-button" id="resume-button"> Resume </button>
<button class="game-menu-button" id="back-button"> Main Menu </button>
</div>
</div>
<canvas class="body-divs" id="stage" width="600" height="600">
</canvas>
</div>
And here is the CSS:
.body-divs, #score-div{
padding-left: 0;
padding-right: 0;
margin-left: auto;
margin-right: auto;
display: block;
margin-top: 5%;
}
#pause-menu {
position: absolute;
font-family: 'Manaspace';
padding: 10px;
background-color: yellow;
text-align: center;
max-width: 250px;
width: 100%;
margin-left: auto;
margin-right: auto;
border-style: solid;
border-color: gold;
border-radius: 4px 4px;
}
#resume-button, #back-button {
margin: 10px;
}
#resume-button {
font-size: 22px;
}
#back-button {
font-size: 15px;
}

You can put #pause-menu and the canvas in shared .container parent who has position: relative and then center the #pause-menu using position: absolute along with top: 50%; left: 50%; transform: translate(-50%, -50%) to center it over the canvas. Example:
.container {
position: relative;
}
#pause-menu {
position: absolute;
font-family: 'Manaspace';
padding: 10px;
background-color: yellow;
text-align: center;
max-width: 250px;
width: 100%;
margin-left: auto;
margin-right: auto;
border-style: solid;
border-color: gold;
border-radius: 4px 4px;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
#resume-button, #back-button {
margin: 10px;
}
#resume-button {
font-size: 22px;
}
#back-button {
font-size: 15px;
}
<div id="score-div">
<span id="score-text"></span>
<span id="level-text"></span>
<button id="pause-button">pause</button>
</div>
<div class="container">
<div id="pause-menu">
<span class="menu-text"> Paused </span>
<div id="game-menu-div-4">
<button class="game-menu-button" id="resume-button"> Resume </button>
<button class="game-menu-button" id="back-button"> Main Menu </button>
</div>
</div>
<canvas class="body-divs" id="stage" width="600" height="600"></canvas>
</div>

#pause-menu {
position: relative;
An element with position: absolute; is positioned relative to the nearest positioned ancestor (instead of positioned relative to the viewport, like fixed).
However; if an absolute positioned element has no positioned ancestors, it uses the document body, and moves along with page scrolling.

Move content left and right on click

I am trying to move content left and right using on click event and need to stop by margins on the left or right. list-items generating dynamically. Here is the code I tried so far but no worth. By my code it is moving the container left and right. But I need to move list-items left and right.
How can I do this.?
function moveList(px) {
$('.list').animate({
'marginLeft': px
});
}
.list {
white-space: nowrap;
overflow: auto;
height: 85px;
padding: 10px 0;
margin: 25px 0;
position: relative;
}
.list-item {
display: inline-block;
min-width: 20%;
max-width: 150px;
padding: 10px 0;
border-radius: 3px;
background: #eee;
border: 1px solid #ddd;
margin: 0 5px;
cursor: pointer;
text-align: center;
}
#right-arrow {
width: 40px;
height: 40px;
display: block;
position: absolute;
right: 0;
top: 35px;
z-index: 999;
border-radius: 50%;
background: url(img/right-arrow.png) no-repeat #000;
}
#left-arrow {
width: 40px;
height: 40px;
display: block;
position: absolute;
left: 0;
top: 35px;
z-index: 999;
border-radius: 50%;
background: url(img/left-arrow.png) no-repeat #000;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="right-arrow" onclick="moveList('-=50px')"></div>
<div id="left-arrow" onclick="moveList('+=50px')"></div>
<div class="list">
<div class="list-item">1</div>
<div class="list-item">2</div>
<div class="list-item">3</div>
<div class="list-item">4</div>
<div class="list-item">5</div>
<div class="list-item">6</div>
<div class="list-item">7</div>
<div class="list-item">8</div>
<div class="list-item">9</div>
<div class="list-item">10</div>
</div>

Try script like this:
function moveList(px) {
$(".list-item:first-child").animate({
'marginLeft': px
});
}

It will be easier for you if you create a element that wraps the .list-items with:
position: absolute;
top: 0;
left:0;
Then, instead of modify the margin, you should modify the left value.
If you want to use semmantic content for your web it's better to use another HTML structure, not only div. For example:
<nav> <!-- As this is containing page navigation elements-->
<ol> <!-- As this is an ordered list of elements-->
<li> <!-- Each list element-->
First element
</li>
<li>
Second element
</li>
</ol>
</nav>

Simply translate them.
Define this (given that clicker is the selector for your click event).
var xValue = -5;
$("#clicker").on('click', function(e) {
e.preventDefault();
$(".list-item").css("transform","translateX("+xValue+")");
xValue -= 5;
});
Translate will not mess with your markup, and only move the objects it's working on to the left (in this case).
By keeping xValue you can keep moving them to the left by repeatedly clicking clicker.

Input with a copy button just like github clone view

I need to develop a view with similar tooltip which is on github.
I tried using the css but was not able to create the exact ui.
My CSS is as follow
[tooltip] {
display: inline;
position: relative;
}
[tooltip]:hover:after {
background: #333;
background: rgba(0, 0, 0, .8);
border-radius: 5px;
bottom: 26px;
color: #fff;
content: attr(tooltip);
left: 20%;
padding: 5px 15px;
position: absolute;
z-index: 99;
white-space: nowrap;
}
[tooltip]:hover:before {
border: solid;
border-color: #333 transparent;
border-width: 6px 6px 0 6px;
bottom: 20px;
content: "";
left: 50%;
position: absolute;
z-index: 99;
}
Please advise how can I get the same effect.

For what is worth if you consider bootstrap, similar, or a partial bootstrap installation or related classes, you can achieve this like this:
HTML
<div class="container">
<div class="col-xs-4 col-xs-push-4 martop50">
<div class="input-group">
<span class="input-group-addon">https://</span>
<input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
<span class="input-group-addon"><i class="fa fa-clipboard" data-toggle="tooltip" data-placement="bottom" title="Copy to clipboard"></i></span>
</div>
<span class="download-btn"><button class="btn btn-sm" ><i class="fa fa-download"></i></button></span>
</div>
</div>
CSS
.martop50{
margin-top:50px;
}
.download-btn{
display:inline;
float: left;
margin: 0px 2px;
}
.btn-group-sm>.btn, .btn-sm {
padding: 7px 12px;
font-size: 12px;
line-height: 1.5;
border-radius: 3px;
}
.input-group {
position: relative;
display: table;
border-collapse: separate;
width: 88%;
float: left;
}
Tooltip JQUERY
$(function () {
$('[data-toggle="tooltip"]').tooltip()
})
The rest of your work would be practically cosmetics and replacing the http:// with a dropdown. That should be fairly easy for you to do.
Here is the DEMO

Try removing , adjusting left:20% , also possibly padding: 5px 15px; at [tooltip]:hover:after

Here's a tooltip that opens downwards.
[tooltip] {
display: inline;
position: relative;
border-bottom: 1px dotted rgba(0,0,0,.21);
}
[tooltip]:hover {
border-bottom: 1px solid transparent;
}
[tooltip]:hover:after {
background: #333;
background: rgba(0, 0, 0, .8);
border-radius: 5px;
top: calc(100% + 3px);
color: #fff;
content: attr(tooltip);
left: 50%;
transform: translateX(-50%);
padding: 5px 15px;
position: absolute;
z-index: 99;
white-space: nowrap;
box-sizing: border-box;
}
[tooltip]:hover:before {
border: solid;
border-color: transparent transparent rgba(0,0,0,.8);
border-width: 6px;
bottom: -3px;
left: calc(50% - 3px);
content: "";
position: absolute;
z-index: 99;
}
<div tooltip="I am tooltip">
I am some content.
</div>
<hr>
Let's see a tooltip on an <span tooltip="Hey, I'm a tooltip, too!">inline element.</span>
However, the way to go here is to have tooltip arguments on the html element and build specific positioning rules for your alignment params (You probably want to have tooltip-position attribute set to top|bottom|left|right and have specific CSS for each case). For example:
[tooltip][tooltip-position="bottom"]:hover:after { /*code here*/ }
From the looks of it, considering the required coding effort and your apparent CSS knowledge, using a library might save you some time. Possible candidates:
Bootstrap Tooltip
jQuery tootip
tooltipster
qtip2
tipped
tooltipsy
These are only a few examples, I'm not endorsing any of them and there are plenty of others. You should research this yourself and decide based on your projects' needs.

JS: Relative positioning of tooltip on right of icon

I have an icon, and when you hover over it, I would like to have a custom CSS tooltip appear to the right of the icon. Whether or not you scroll up or down the page, the tooltip will always need to appear to the right of the icon.
And no, I don't want to use any plugins. I just want a little JS/CSS to get the job done. If you use JQuery, it needs to be compatible with v1.7, and JQuery-UI: v1.8.
In addition, it needs to be compatible with IE 6 and 7.
I would prefer to leave my elements as siblings, but it looks like under certain circumstances the div that appears needs to be a child element, so it's OK if the HTML needs to be changed.
HTML:
<img src="" class="icon">ICON<img/>
<div class="demo">
STUFF<br/>
STUFF<br/>
STUFF<br/>
STUFF<br/>
STUFF<br/>
</div>
CSS:
.demo {
margin-left: 5px;
padding: 10px;
width: 265px;
height: 110px;
background-color: #ccc;
position: relative;
border: 2px solid #333;
}
.demo:after, .demo:before {
border: solid transparent;
content: ' ';
height: 0;
right: 100%;
position: absolute;
width: 0;
}
.demo:after {
border-width: 11px;
border-right-color: #ccc;
top: 13px;
}
.demo:before {
border-width: 14px;
border-right-color: #333;
top: 10px;
}
Live Example: http://jsfiddle.net/49Js3/16/

Since my reputation isn't high enough to comment on the answer above, I just wanted to add an updated fiddle (based on the above answer) that positions the tooltip absolutely, but with display: inline-block so that it is not fixed to certain position from the left and will show to the right:
here is the important bit:
a.tippy:hover + div {
display: inline-block;
position: absolute;
}
http://jsfiddle.net/7gmv3wo2/

Fiddle here: http://jsfiddle.net/49Js3/29/
I don't have access to IE6, so I don't know whether it's legal. I do know you'll need an anchor to get hover behavior with CSS in IE7 and earlier.
So, I added an anchor around your image, as well as a div to contain the tooltip.
HTML
<div class="outer">
<a class="tippy" href="">
<img src="" class="icon">ICON<img/>
</a>
<div class="demo">STUFF
<br/>STUFF
<br/>STUFF
<br/>STUFF
<br/>STUFF
<br/>
</div>
</div>
And here is the CSS:
.tippy {
text-decoration: none;
}
.outer {
width: 350px;
}
a.tippy:hover + div {
display:block;
float: right;
}
.demo {
margin-left: 5px;
padding: 10px;
width: 265px;
height: 110px;
background-color: #ccc;
position: relative;
border: 2px solid #333;
display: none;
}
.demo:after, .demo:before {
border: solid transparent;
content:' ';
height: 0;
right: 100%;
position: absolute;
width: 0;
}
.demo:after {
border-width: 11px;
border-right-color: #ccc;
top: 13px;
}
.demo:before {
border-width: 14px;
border-right-color: #333;
top: 10px;
}

Horizontally slide out content with JQuery on click, click again to close?

I can't seem to quite find what I need. Without trying too hard to explain it, I basically need the "Connect" social media bar in the top right of this website - http://www.cmssquirrel.com/web_works/
I won't be using it for that purpose exactly, but it works exactly like I need my function to do. Everything I found seems to be a vertical menu style thing. I need to horizontally expand content on click and hide it again on click once more. Not quite sure where to begin?

Here's more of a starting point than a polished solution, but it should get you going in the right direction.
DEMO
HTML
<div class="wrap">
<a class="open" href="#">open</a>
<div class="outer">
<div class="slide">
One
a
uaoeua
aoeue
aaoeeo
</div>
</div>
</div>
jQuery
var w = 0;
$('.slide').children().each(function() {
w += $(this).outerWidth();
});
$('.outer').width(w+5);
$('.wrap').width(w);
$('.slide').css('left', w);
$('.open').toggle(function() {
$('.slide').stop().animate({
left: 0
});
$(this).html('close');
}, function() {
$('.slide').stop().animate({
left: w
});
$(this).html('open');
});
CSS
.wrap {
position: relative;
left: 50px;
top: 20px;
}
.outer {
height: 40px;
position: relative;
overflow: hidden;
}
.slide {
border-radius: 19px 19px 19px 19px;
position: absolute;
top: 0;
right: 0;
background-color: black;
height: 40px;
}
a {
color: gray;
line-height: 35px;
float: left;
outline: none;
}
.slide a {
float: left;
display: block;
padding: 0 10px;
}
.slide > :first-child {
padding-left: 15px;
}
.slide > :last-child {
padding-right: 45px;
}
.open {
position: absolute;
right: -25px;
top: 0;
background-color: black;
border-radius: 19px 19px 19px 19px;
height: 40px;
padding: 0 15px;
z-index: 5;
}

You can extend jQuery's animation functionality to achieve this.
See a demo of this at:
http://dock.ronggur.com/tutorial/jquery%20tutorial%20-%20horizontal%20animated%20menu/
which is outlined at:
http://sandbox.ronggur.com/2009/01/25/jquery-tutorial-horizontal-animated-menu/
Essentially, you could just substitute the hover event in that demo, and use a click event.