<head>
<title>Overlay test</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<style type="text/css">
#overlay {
position: absolute;
background-color: #ccffcc;
display: none;
height: 200px;
margin: 0 auto;
width: 200px;
}
</style>
<script type="text/javascript">
//<![CDATA[
function hide() {
document.getElementById("overlay").style.display = "none";
}
function show() {
document.getElementById("overlay").style.display = "block";
}
//]]>
</script>
so when the user clicks it runs show() which places the css box on top. However i want it to be centered in the browser. I've set the margin: 0 auto; which should be doing the trick shouldnt it?
I'm just trying to create an overlay function without using jquery because it seems to be incompatible with my schools cms templates.
Thanks
Margin: 0 auto won't work on position absolute elements, they exist in their own little world, outside of normal flow. So in order to pull this off, you need to do an extra step. The CSS dead centre technique will work here.
Try setting the top and left attributes on your overlay.
Use % to set top and left position. Set css attribute top:10%; Left 40%;
Related
I want to make the grid element to fall down to the page . I used setInterval to repeat the proces (the bottom will decrease so the grid will descend ) . I think I didn't create move() function correctly.I just want to know how can I set the function correctly .
!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel= "stylesheet" href ="style.css"></link>
</head>
<body>
<div class="grid"></div>
<script src="javascript.js" ></script>
</body>
</html>
.grid {
background-color:blue;
height: 20px;
width :100px;
left:600px;
top:150px;
position : absolute;
}
var grid =document.querySelector('.grid');
function move () {
grid.style.bottom-=4;
grid.style.bottom=grid.bottom +'px';
}
move();
setInterval(move,30);
If you would still like to implement your approach to realize this movement, here is some feedback.
Bottom value is String, not numerical (e.g. 300px vs 300)
If you want to manipulate the bottom value of an element, you have to parse the numerical value first, then change it, and then append a 'px' (or whatever unit you're using).
// grid.style.bottom-=4; // subtraction on strings is not allowed
// instead, use:
const currentBottom = parseInt(grid.style.bottom, 10)
grid.style.bottom = (currentBottom - 4) + 'px'
document.getElementById(...).style misses styles from <style> blocks and stylesheets
If you want to get all current styles of a DOM element, you should use window.getComputedStyle. As described in the docs:
getComputedStyle is read-only, and should be used to inspect the element's style — including those set by a element or an external stylesheet
In the snippet below, you can see and compare the values grid.style.bottom and window.getComputedStyle(grid). At first, the first version is empty, but the second has the expected value from the stylesheet.
Alternatively, you could directly apply the style in-line with the HTML element. Then you could use .style as well for accessing the correct value from the beginning.
<div class="grid" style="bottom: 100px"></div>
Check out the fixed version of the snippet below with a delay of 3 seconds for better understanding.
var grid = document.querySelector('.grid');
function move() {
const style = grid.style.bottom
const computedStyle = window.getComputedStyle(grid)
console.log('bottom', style)
console.log('bottom from computed style', computedStyle.bottom)
// grid.style.bottom -= 4;
// grid.style.bottom = grid.bottom + 'px';
const newBottom = parseInt(computedStyle.bottom, 10) - 4; // parseInt only reads the numeric value from the bottom string
grid.style.bottom = newBottom + 'px';
}
move();
setInterval(move, 3000);
.grid {
background-color: blue;
height: 20px;
width: 100px;
left: 100px;
bottom: 200px;
position: absolute;
}
<div class="grid"></div>
I would recommend you to use a CSS animation for that, you don't need JavaScript for that.
.grid {
background-color: blue;
height: 20px;
width: 100px;
left: 100px;
position: absolute;
animation: move 1.5s forwards;
}
#keyframes move {
from {
bottom: 200px;
}
to {
bottom: 0;
}
}
<body>
<div class="grid"></div>
</body>
I have created an iframe (lets call it a div to simplify things), that has a transform: scale property that I'm calling with javascript.This scales the div, but however, it also shifts the div upwards. I would like the top to stay in the same place.
Background info (from answers suggestions): I want to create something that looks like google docs. I have created an iframe that will transform when an input box value is change (like google docs). I want the top to remain in the same place (like google docs).
1) I have tried in javascript to implement document.getElementById("textareathingy").style.transform = "translateY(1000px)"; document.getElementById("textareathingy").style.transform = "scale(" + percentage + ")"; I tried to put the translate both before and after the scale, but both methods do not work, and the div continues to go upwards when I put translate first, and the div does not zoom in when I put scale first.
2) I have tried to put position: absolute; to counteract it going up, but that doesn't help either, and it gets rid of my scrolling feature on the div. So in answers please don't use position: absolute.
3) I have tried using the zoom feature, but that doesn't zoom in on the contents of the div, so that also doesn't work.
For some reason, there is no error messages in any of my attempts.
Here is also my css for the div:
#textareathingy{
width: 820px;
margin: 20px auto;
height: 1000px;
border: none;
display: block;
padding: 75px;
background-color: white;
box-shadow: 0 0 5px 0 rgba(0,0,0,0.2);
}
Here are two pictures from google docs that represents what I want.
Notice how they both have the same "top" position, but it is zoomed in.
Use the transform-origin CSS property to set the point in the element that the transform should originate from. Set this to top so that the scale extends downward from the top point.
img { border:1px solid black;}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CSS Transforms</title>
<style>
img {
/* Single Transformations: */
transform-origin: top;
}
/* Triggering a transformation: */
img:hover {
transform: scale(1.5, 1.5);
}
</style>
</head>
<body>
<img class="car" src="data:image/png;base64,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">
</body>
</html>
To trigger this from JavaScript, just access the transformOrigin property as you would any other:
let img = document.querySelector("img");
img.style.transformOrigin = "top"; // Set the origin
img.addEventListener("mouseover", function(){
this.classList.add("scale");
});
img.addEventListener("mouseover", function(){
this.classList.remove("scale");
});
.scale {
transform:scale(1.5,1.5);
}
img { border:1px solid black; }
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CSS Transforms</title>
<style>
img {
/* Single Transformations: */
transform-origin: center;
}
/* Triggering a transformation: */
img:hover {
transform: scale(1.5, 1.5);
}
</style>
</head>
<body>
<img class="car" src="data:image/png;base64,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">
</body>
</html>
So I'm making a website where I have several divs that should slide either from right, left, or top when user clicks on specific button or nav items. However, none of those are working. None of the divs will slide over when I click on the button that are supposed to make them slide. I'm using pure javascript to perform those actions. So far, I've tried several actions. First, I thought it was because I didn't have window.onload, but after adding it, nothing changed. Then I though maybe the links were still carrying the default actions, so I tried to add e.preventDefault in hopes that was the problem, it also didn't work. Then I found out something weird that made think maybe it is my computer that is not interpreting javascript correctly(weird thought, I know. But I was just considering anything since I was running out of solutions).But actually, it turns out that my computer or the editor is not reading "document" or window in javascript. It says both of them are not defined, which is weird since I have linked the javascript file correctly at the end of the body. So I decided to run it on JSFiddle to check whether it was really just my computer. However, even in JSFiddle the divs still won't slide when I click the button to make them slide.
I'm out of ideas. Since the project I'm doing is big, I extracted the part of divs that are not sliding to make things easier. The div you guys will see, is supposed to slide from the left when we click on the same div.
Here is the html code:
<!DOCTYPE>
<html>
<head>
<title>Emanuel Inacio</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="style.css">
<link href="https://fonts.googleapis.com/css? family=Roboto+Condensed:100,300,400" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<div id="home-page">
<div id="nav-bar"></div>
</div>
<script type="text/javascript" src="script.js"></script>
</body>
</html>
Here is the css code:
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Roboto Condesed', 'San-serif';
}
#nav-bar {
width: 50%;
height: 100vh;
background-color: #000000;
transform: translateX(-50%);
transition: transform 0.5s;
}
.active {
transform: translateX(50%);
}
Finally, this is the javascript part:
var nav = document.getElementById("nav-bar");
window.onload = function () {
nav.addEventListener("click", function () {
nav.classList.toggle("active");
});
}
Every other div that is not working has pretty much the same code base as this one. Hence I decided to post only this div. Thanks in advance!
It's a specificity issue, ID is more specific than class so your style will never be applied. You need to adjust CSS like this:
var nav = document.getElementById("nav-bar");
window.onload = function() {
nav.addEventListener("click", function() {
nav.classList.toggle("active");
});
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Roboto Condesed', 'San-serif';
}
#nav-bar {
width: 50%;
height: 100vh;
background-color: #000000;
transform: translateX(-50%);
transition: transform 0.5s;
}
#nav-bar.active {
transform: translateX(50%);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="home-page">
<div id="nav-bar"></div>
</div>
I am aware I can use background-image: url("www.linktoimage.com/image.png"), in css, to place an image in the background. I also know I can add a javascript file into html with tag. My challenge is how do I apply css characteristics of a background image to my javascript file?
To add some context, the javascript file is a simple animation (randomly bouncing balls, that responds to the screen width and height. I want to place text on top of this as if it was background, but no matter what I do, text will place itself above the script, in a white box, instead of directly on top of my script. Below is the general result of my various attempts:
I would like to place "Welcome" on top of my javascript, as oppose to how it currently appears on top of window with a white background. My css is as follows:
#font-face {
font-family:'HighTide';
src: url('assets/HighTide.otf')
font-family:'HighTideSans';
src: url('assets/HighTideSans.otf')
}
body {
padding: 0;
margin: 0;
}
canvas {
vertical-align: top;
z-index: -1
}
.title {
font-family:'HighTide';
font-size: 10vw;
margin: auto;
text-align: center;
z-index: 1;
}
.enter {
font-family:'HighTideSans';
font-size: 2vw;
text-align: center;
margin: auto;
z-index: 1;
}
And here is the html:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>LockeDesign</title>
<script src="libraries/p5.js" type="text/javascript"></script>
<script src="libraries/p5.dom.js" type="text/javascript"></script>
<script src="libraries/p5.sound.js" type="text/javascript"></script>
<script src="libraries/svg.js" type="text/javascript"></script>
<script src="main.js" type="text/javascript"></script>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class=title> WELCOME </div>
<a href="main.html" class=enter> </a>
</body>
</html>
Any suggestions are appreciated, thank you!
EDIT
Using position: absolute; works partially, all I had to do was add left: 0;
right: 0; and bottom: 50%; to re-center the text. Resizing the window would cause scrollbars to appear, which was less than desirable, so I added overflow:hidden; to the body tag. Now this works exactly as intended, thanks all!
I would suggest WRAPPING all of the content you wish to display over the dynamic background in a single div
Example
<html>
<body>
<div id="BodyWrapper">
<h1> This is an HTML Page </h1>
</div><!-- End BodyWrapper -->
</body>
</html>
Then apply some Z positioning to the BodyWrapper with css
#BodyWrapper{position:absolute; top:0; left:0; width:100%; height:100%; z-index:5;}
If the above is still not enough then you may have to delay the
showing of the body content (make sure the dynamic background
completely loads first).
You can set the initial display styling of the wrapper to
#BodyWrapper{position:absolute; top:0; left:0; width:100%; height:100%; z-index:1; display:none;}
and onLoad... call this function
function show_PageBody()
{
setTimeout(function(){ update_Wrapper(); },1000);
function update_Wrapper()
{
document.getElementById('BodyWrapper').style.display='block';
document.getElementById('BodyWrapper').style.zIndex = 5;
}
}
You can add a css transition for the opacity of the BodyWrapper so that it fades onto the screen instead of just appearing.
This should work (has worked for me in the pass).
If not please let me know.
Using position: absolute; works partially, and renders this result:
All I had to do was add left: 0; right: 0; and bottom: 50%; to re-center the text. Also, resizing the window would cause scrollbars to appear, which was less than desirable, so I added overflow:hidden; to the body tag. Now this works exactly as intended:
I have two HTML documents, b.html contains c.html using an iframe.
On b.html I need to draw some DIV (in my example id=selector), which partially cover content of c.html visualized in the iframe.
I need to get the ID of a DOM element corresponding to the mouse coordinate under the DIV selector.
At the moment Using document.elementFromPoint() directly in in c.html works partially, as when the mouse it is on DIV selector I cannot identify the underling DOM element in c.html (in this example DIV c).
I would need to know:
Is it possible to select element under another, using document.elementFromPoint() or any other means?
What could be a possible alternatively solution possibly using DOM and native API?
Example here (Please look at the console in Chrome):
http://jsfiddle.net/s94cnckm/5/
----------------------------------------------- b.html
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>B</title>
<script type="text/javascript">
window.app = {
start: function () {
}
};
</script>
<style>
#selector {
position: absolute;
top: 150px;
left: 150px;
width: 250px;
height: 250px;
-webkit-box-shadow: 0px 0px 0px 5px yellow;
-moz-box-shadow: 0px 0px 0px 5px yellow;
box-shadow: 0px 0px 0px 5px yellow;
}
#iframe {
width: 500px;
height: 500px;
border: none;
}
</style>
</head>
<body onload="app.start();">
<div id="selector">SELECTOR</div>
<iframe id="iframe" src="c.html"></iframe>
</body>
</html>
----------------------------------------------- c.html
<html lang="en">
<head>
<meta charset="utf-8" />
<title>C</title>
<script type="text/javascript">
window.app = {
start: function () {
document.querySelector('body').addEventListener('mousemove', function (event) {
//console.log(event.pageX, event.pageY, event.target.id);
var item = document.elementFromPoint(event.pageX, event.pageY);
console.log(item.id);
}.bind(this));
}
};
</script>
<style>
body {
background-color: lightslategray;
}
#a {
position: absolute;
top: 50px;
left: 50px;
width: 100px;
height: 100px;
background-color: green;
z-index: 2;
}
#b {
position: absolute;
top: 100px;
left: 100px;
width: 100px;
height: 100px;
background-color: #ffd800;
z-index: 1;
}
</style>
</head>
<body onload="app.start();">
<h1>Content</h1>
<div id="a">a</div>
<div id="b">b</div>
</body>
</html>
A possible soltion is the usage of pointer-events.
The CSS property pointer-events allows authors to control under what
circumstances (if any) a particular graphic element can become the
target of mouse events. When this property is unspecified, the same
characteristics of the visiblePainted value apply to SVG content.
When you apply
#selector {
/* ... */
pointer-events: none;
}
All content of #selector and the element itself are no more interactive. Content may not be selected and events like :hover or click are not applicable.
Here is the demo with the above css: http://jsfiddle.net/s94cnckm/6/
Another possible solution, is to capture the document coordinates of a mouse event fired on the masking item(DIV.selector), momentarily hide that masking item, and then ask the document what is under that coordinate position (using document.elementFromPoint(x,y)) before showing the masking item again.
The support for document.elementFromPoint() cover also old version of IE.
Unfortunately pointer-events has limited support for older version of IE.
Here a working example:
http://jsfiddle.net/s94cnckm/14/
document.getElementById('iframe').contentDocument.addEventListener('click', function (event) {
alert(event.target.id);
}.bind(this));
document.getElementById('selector').addEventListener('click', function (event) {
var selector = document.getElementById('selector');
selector.style.display = 'none';
var item = document.getElementById('iframe').contentDocument.elementFromPoint(event.pageX, event.pageY);
selector.style.display = '';
alert(item.id);
}.bind(this));
Regarding the use of pointer-events I link to mention some related article, included a work around for older version of IE.
How to make Internet Explorer emulate pointer-events:none?
https://css-tricks.com/almanac/properties/p/pointer-events/
http://davidwalsh.name/pointer-events
http://robertnyman.com/2010/03/22/css-pointer-events-to-allow-clicks-on-underlying-elements/
This solution was inspired by this article:
http://www.vinylfox.com/forwarding-mouse-events-through-layers/