i use scrollLeft to scroll to the right 50px
but then i log the value of scrollLeft, it is 49.599998474121094px not 50px
how to make it scroll 50px
here is what it shows
thanks for your support
function myFunction() {
var elmnt = document.getElementById("myDIV");
elmnt.scrollLeft += 50;
elmnt.scrollTop += 10;
document.getElementById ("demo").innerHTML = "Horizontally: " + elmnt.scrollLeft + "px<br>Vertically: " + elmnt.scrollTop + "px";
}
#myDIV {
height: 250px;
width: 250px;
overflow: auto;
}
#content {
height: 800px;
width: 2000px;
background-color: coral;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<p>Click the button to scroll the contents of div by 50px horizontally and 10px vertically.</p>
<p><strong>Tip:</strong> Click the button many times to scroll the same amount each time.</p>
<button onclick="myFunction()">Scroll contents of div</button><br><br>
<div id="myDIV">
<div id="content">
Some text inside a div element.<br><br>
Some text inside a div element.
</div>
</div>
<p id="demo"></p>
</body>
</html>
Your Chrome browser window is most probably set to a zoom of 125% - which leads to this awkward result:
49.599998474121094px
Set the Zoom to 100% and there it is:
50px
Related
i try to set a margin bottom to the body element, but it wont work as expected...
document.addEventListener('DOMContentLoaded', (event) => {
if(window.outerWidth > 768) {
let footerHeight = document.querySelector('footer').offsetHeight;
document.querySelector('body').style.marginBottom = footerHeight + "px";
}
/* .... */
});
its just doing nothing.
the weird part i dont understand: it works as expected when i try to set it as a paddingBottom, but when i change it to margin...
my current solution for now is to wrap it in a setTimeout() like:
document.addEventListener('DOMContentLoaded', (event) => {
if(window.outerWidth > 768) {
setTimeout(function(){
let footerHeight = document.querySelector('footer').offsetHeight;
document.querySelector('body').style.marginBottom = footerHeight + "px";
}, 1);
}
/* .... */
});
let footerHeight gets the correct value in any cases.
no other scripts are loaded which i can think of could affect this...
The simplified CSS & HTML:
body {
margin: 0;
padding-top: 48px;
}
.content-wrapper {
background: #fff;
padding-bottom: 40px;
box-shadow: 0 2px 2px rgba(0, 0, 0, 0.08), 0 4px 4px rgba(0, 0, 0, 0.16);
}
footer {
position: fixed;
bottom: 0;
z-index: -1;
background-size: cover;
background-position: center;
display: flex;
width: 100%;
}
<!DOCTYPE html>
<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, maximum-scale=1.0, user-scalable=0">
</head>
<body class="start">
...
<div class="content-wrapper">
...
</div>
<footer style="background-image: url('/images/polygon.jpg');">
<div class="container">
<div class="row">
...
</div>
</div>
</footer>
<script src="/js/script.js"></script>
</body>
</html>
creates this type of footer reveal effect: https://codepen.io/hkdc/pen/BLJAVL
but to make sure that the whole footer is always visible i add a margin-bottom of the footers height to the body element.
Anyone has an idea what is happening here or am i getting wrong and can explain it?
I'm not sure you understand body tag correctly. You footer is in that body too adding margin to body cant have any effect in this case cause there is no element (at least visible) after body. Padding works cause padding is for the elements inside the body. If you want to add margin before your footer you can use previousSibling property and set its margin.
Ok, so I have this html file (sec1_2.html).
<body>
<div id="nameContainer">
<input id="sect1Name">
</div>
<style type="text/css">
body {
margin: 0px;
padding: 0px;
}
div#nameContainer {
background: none repeat scroll 0% 0% #000;
height: 50px;
padding: 0;
margin: 0;
}
input#sect1Name {
width: 330px;
margin: 0;
height: 50px;
padding: 0;
}
</style>
Is a simple div with an input in it.
As you can see, the height on the div and on the input are the same (50px).
So when you display this page you get the input inside the div at the exact same height.
But, now I have this other html (index.html):
<!DOCTYPE html>
<html>
<body>
<div id="section1">
</div>
<script src="js/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$("#section1").load("sec1_2.html");
</script>
</body>
Now, here, I have an empty div where I load the external html (sec1_2.html).
When I do it like this, the (visible) height on the input increases!
I don't know why the input changes, if a let the input without height, both versions display the same height (default), but if I set a defined height, it will show a different height when loaded with jQuery.
Anyone knows why is this happening?
Hi for some reason your input is been rendered without one default property with the Jquery call, you can add this to your CSS:
input#sect1Name {
box-sizing:border-box;
}
This property is assigned for default in the html but not with Jquery.
http://plnkr.co/edit/6h8U9AQgFaNUb2plPbh6?p=preview
Safari: Works
Firefox: Weird floating issue on initial page load, works after browser resize
Chrome: End boxes jump around quickly when making window smaller
(have not tested other browsers)
Video displaying browser issues: http://tinypic.com/r/2gxo8w3/6
Full script:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
</head>
<style>
.box {
height: 250px;
background-color: #999;
float: left;
margin-right: 10px;
margin-top: 10px;
}
#boxes {
width: 100%;
overflow: auto;
}
.end-box {
margin-right: 0;
}
.top-box {
margin-top: 0;
}
</style>
<body>
<div id='boxes'>
<div class='box'>1</div>
<div class='box'>2</div>
<div class='box'>3</div>
<div class='box'>4</div>
<div class='box'>5</div>
<div class='box'>6</div>
<div class='box'>7</div>
<div class='box'>8</div>
</div>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
columns = Math.floor($('#boxes').width()/225); //min box/column size (before spacing)
var spacing = ((columns - 1) * 10/$('#boxes').width())*100; //10px spacing between boxes
$('.box').width(100/columns-spacing/columns+'%');
$('.box:nth-child('+columns+'n+0)').addClass('end-box');//removes margins
$('.box:nth-child(-n'+columns+')').addClass('top-box');
$(window).resize(function() {
columnsCheck = Math.floor($('#boxes').width()/225);
if(columns != columnsCheck) {
$('.end-box').removeClass('end-box');
$('.top-box').removeClass('top-box');
$('.box:nth-child('+columnsCheck+'n+0)').addClass('end-box');
}
columns = columnsCheck;
var spacing = ((columns - 1) * 10/$('#boxes').width())*100;
$('.box').width(100/columns-spacing/columns+'%');
$('.box:nth-child('+columns+'n+0)').addClass('end-box');
$('.box:nth-child(-n'+columns+')').addClass('top-box');
});
</script>
</body>
</html>
How can I solve this issue (while maintaining 10px margins). I am also open to alternative methods of creating this effects via JavaScript/jQuery (trying to avoid pure CSS3).
How can I use the current width/height (which are both specified in percentage 100%) as the minimum width/height?
Here is a try:
<!doctype html>
<html>
<head>
<title>Layout</title>
<script>
var myDiv = document.body;
var curWidth = myDiv.style.width;
var curHeight = myDiv.style.height;
myDiv.style.minWidth = curWidth;
myDiv.style.minHeight = curHeight;
myDiv = document.getElementById('wrapper1');
var curWidth = myDiv.style.width;
var curHeight = myDiv.style.height;
myDiv.style.minWidth = curWidth;
myDiv.style.minHeight = curHeight;
</script>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
html {
height: 100%;
}
body {
height: 100%;
}
#wrapper1 {
width: 100%;
height: 100%;
}
#wrapper2 {
width: 8%;
height: 100%;
float: left;
}
#wrapper3 {
width: 92%;
height: 100%;
float: left;
}
</style>
</head>
<body>
<div id="wrapper1">
<div id="wrapper2">
Wrapper
</div>
<div id="wrapper3">
Wrapper
</div>
</div>
</body>
</html>
Trying to set min width/height of all divs to be the current width/height (which are both 100% by css) using Javascript (or using only css if possible)
Be aware of the fact that myDiv.style.height does not return the height of an element if that was set through CSS, but only if the div looked something like <div style="height: 10px"></div>. You should use:
var curHeight = myDiv.offsetHeight;
var curWidth = myDiv.offsetWidth;
Edit: Oh, and you need to move your script tag at the end of your html, or you won't be able to select wrapper1 (or in a different file?).
Here is references on offsetHeight and offsetWidth. Here
That is the only problem I see with your approach assuming you do a document.write to insert the retrieved css values.
As far as I understand, If you dont specify the width and height of a div by default it will always take it from its enclosing div.
example:
<body>
<div id="wrapper1">
<div id="wrapper2">
Wrapper
</div>
<div id="wrapper3">
Wrapper
</div>
</div>
</body>
<style>
#wrapper1 {
width: 100%;
height: 100%;
}
</style>
This will apply width and height both as 100% to all 3 divs in wrapper1, wrapper2, wrapper3
I'm trying to make a drag box with a sibling img and the 'move-obj' can be dragged.It runs correctly in other browser but IE(8,9,10). In IE, just while you hover the border can you drag the 'move-obj', but if you remove the tag 'img' it work correctly.I found that if I add a background-color to the 'move-obj',it will run correctly too, but it isn't what I want. Can somebody give me some advice?Here is the codepen
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.wrap{
position: relative;
width: 100%;
height: 100%;
background-color: #f0f0f0;
padding: 10%;
}
.wrap-inside{
position: relative;
width: 500px;
height: 500px;
border: 1px solid #ddd;
}
.move-obj{
cursor: move;
position: absolute;
width: 100px;
height: 100px;
border: 1px solid blue;
}
.bg{
width: 500px;
height: 500px;
position: absolute;
}
</style>
</head>
<body>
<div class="wrap">
<img class="bg" src="https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTE2qkLv64zdI4z5uIbE1oSMmI0AiQcbwbhAYAyI0cF2Dwg88tb" alt="">
<div class="wrap-inside">
<div class="move-obj"></div>
</div>
</div>
</body>
</html>
If I understand you correctly if and only if you are hovering over the mov-obj div you want to be able to move around the https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcTE2qkLv64zdI4z5uIbE1oSMmI0AiQcbwbhAYAyI0cF2Dwg88tb image, right?
If this is what you want, look into either using jQuery and selecting the div on a hover event
$(.mov-obj).hover(function(event) {
//change the x and y coordinates of the image dynamically here of the image
//you can use the event.pageX and event.pageY (I think) to get how much/many pixels have been moved since the hover happened
}
or you can use pure JavaScript
document.getElementsByClassName("mov-obj").addEventListener("mouseenter", function( event ) {
//do something to change the img position dynamically
}, false);
//also do it for the mouseleave event
document.getElementsByClassName("mov-obj").addEventListener("mouseleave", function( event ) {
//do something to change the img position dynamically
}, false);
maybe set a flag letting you know that the mouseenter has happened, but not the mouseleave event
and then if and only if the mouse is inside the div add a click event to the div
while the click is pressed and the mouseleave event hasn't been triggered dynamically relocate the image depending on how much the mouse pointer has moved
(you can add a click event like this fyi)
document.getElementsByClassName("mov-obj").addEventListener("click", function( event ) {
//do something to change the img position dynamically
}, false);
or with jQuery
$(.mov-obj).click(function(event) {
//do something
}
hope this helps
Edit, just paste this code into a browser and try it out:
Note: this only works if you don't move the mouse outside of the div's width and height that you are wanting to move. I'll let you figure out how to fix that part if the mouse goes outside the div what happens
<DOCTYPE html>
<html>
<head>
</head>
<body>
<style>
#div1 {
border: 2px orange solid;
width: 500px;
height: 500px;
}
#div2 {
border: 2px purple solid;
width: 250px;
height: 250px;
position: absolute;
}
</style>
<div id="div1">
<div id="div2">
</div>
</div>
<script type="text/javascript">
// add event listeners to div
var div2 = document.getElementById("div2");
div2.addEventListener("mousedown", getOriginalPosition, false);
div2.addEventListener("mouseup", changeLocation, false);
var helperX;
var helperY;
function getOriginalPosition(event) {
//use these to help with the calculation later
helperX = event.offsetX;
helperY = event.offsetY;
}
var end_xPosition;
var end_yPosition;
function changeLocation(event) {
end_xPosition = event.pageX;
end_yPosition = event.pageY;
div2.style.left = end_xPosition - helperX;
div2.style.top = end_yPosition - helperY;
}
</script>
</body>
</html>