I'm using Dreamweaver to derive the pixel co-ordinates for image maps. One is already done but the other is proving impossible, perhaps because what I intend isn't permissible. My 'impossible' image that I'd like to set hotspots for is one of the list entries inside an unordered list, and whenever I try to select the img element in code view to marquee the map, it won't work and selects the ul element instead.
I only ever use this software for image-mapping and its code validation feature, but its a pain and I'd just as soon do without it if there's a method for defining/calculating pixel co-ordinates for a circular image map.
Any advice, or is DW behaving itself and what I'm trying isn't permitted in HTML?
Updated: To be more specific, it's not just a list but a div-bounded list that acts as a gallery with its input from clickable thumbnail image anchors, as per the code below (just one list item for clarity). What I'd like to do is make 'stuff-medium.jpg' a clickable image that maps to the next image in the gallery (via a href "#two"), providing navigation bars for my gallery also...
<div id="gallery">
<ul id="gallery-interior">
<li id="one"><img src="../images/stuff_medium.jpg"></li>
</ul>
</div>
<div>
<img src="../images/stuff_thumb.jpg">
</div>
Update II -- this code works; I did it by hand, but I'm blown if I can figure out how to do it in DW:
<li id="one"><img src="../images/stuff_medium.jpg" border=0 usemap="#gallerymap">
<map name="gallerymap"><area shape="circ" coords="399,157,30" href="#two" target="_top"></li>
Place a warning in your code that only shows up if javascript is turned off. Use js to add a class to the body. if js is turned off, the class won't be added and the message will be displayed, if js is on, the class will be added to body and the msg will not be displayed
html:
<aside id="js-warning">This site requires JavaScript to work properly. Please turn it on for more awesomeness!
</aside>
js:
<script>
$(document).ready(function(jswarning) {
$('body').addClass('js');
});
</script>
css:
#js-warning {
display:block;
}
.js #js-warning {
display: none;
}
Related
I have a number of tabs created with CSS that contains a ul within a div. I want to use jQuery to fadeOut() each li when clicked on and also keep track of how many lis have been clicked on. This is the code I have so far, it is currently fading out every single li when one is clicked on.
<div class="tab">
<h2>Lobby</h2>
<ul>
<li>Sponsor logos are displayed correctly and all link to their relevant sponsor booths</li>
<li>Top-left (branding) logo is displayed correctly and links to the event homepage</li>
<li>Lecture Theatre signpost is displayed correctly and links to the Live Redirect</li>
<li>Exhibition Hall signpost is displayed correctly and links to the event Exhibition Hall</li>
<li>If Delegate chat is in use, ensure the Minnit chat widget is displayed correctly and working</li>
<li>Ensure background image is appropriate for the event and displayed correctly, adjustments can be made in the branding tab CSS on the platform</li>
</ul>
</div>
<script>
$(document).ready(function(){
$("li").click(function(){
$("li").fadeOut()
});
});
</script>
To do what you require you need to reference the element which was clicked on. To do that you can use the this keyword within the anonymous function:
$("li").click(function(){
$(this).fadeOut()
});
Alternatively you can use an arrow function to make the code more succinct, however you will need to use the target property of the event argument in this case:
jQuery($ => {
$("li").click(e => $(e.target).fadeOut());
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="tab">
<h2>Lobby</h2>
<ul>
<li>Sponsor logos are displayed correctly and all link to their relevant sponsor booths</li>
<li>Top-left (branding) logo is displayed correctly and links to the event homepage</li>
<li>Lecture Theatre signpost is displayed correctly and links to the Live Redirect</li>
<li>Exhibition Hall signpost is displayed correctly and links to the event Exhibition Hall</li>
<li>If Delegate chat is in use, ensure the Minnit chat widget is displayed correctly and working</li>
<li>Ensure background image is appropriate for the event and displayed correctly, adjustments can be made in the branding tab CSS on the platform</li>
</ul>
</div>
I am a newbie to html and css so sorry if this sounds dumb.
How do I create a clickable area that contains two images, text, and whitespace that when clicked, opens ANOTHER html file within the page?
So far I got an html file to appear inside an html file like this:
<object data=EXAMPLE.html width=100% height=100% /> Error </object>
But the problem with that is that you must scroll within the content box to view it, and I would prefer if it expanded the content box indefinitely downward based on how big the html file was.
As #Jarred Farrish pointed out: Regular frames do what you describe. You don't need object elements.
I believe this question becomes a duplicate of this question.
You can make a "button" by creating a div, placing the other elements within the div, and setting an onclick handler on the div itself. You are free to have as much "empty" space, because the emptiness is really the div.
<div class=my_button onclick=my_button_press();>
<img src="..."></img>
<img src="..."></img>
<span class=my_text>My text here</span>
</div>
<iframe id=my_frame></iframe>
<script>
function my_button_press() {
document.getElementById('my_iframe').src = "...";
}
</script>
Check this example http://jsfiddle.net/b6sdunqj/1/.
You'd want to combine the instruction in the question referenced above with my_button_press() to complete everything.
I am trying to create a set of links to specific sections in the page using the <a href="#..."> notation, but it doesn't seem to work. Clicking on the link seems to do nothing and right-click -> open in a new tab changes the url but does not move to a different section of the page. I am using Firefox 28.0. My links are as follows:
<div>
<p>Contents</p>
<ul>
<li>Map</li>
<li>Timing</li>
<li>Timing Details</li>
</ul>
</div>
And they should be linking to:
<div id="map">[content]</div>
<div id="timing">[content]</div>
<div id="timingdetails">[content]</div>
Links to external webpages work fine. Placing the id="..." feature inside an <a> tag instead did not fix the problem. My webpage url is of the form http://127.0.0.1/foo/bar/baz/. This is within a Python Django project.
Any idea why this isn't working?
Every href needs a corresponding anchor, whose name or id attribute must match the href (without the # sign). E.g.,
Map
<a name="map">[content]</a>
An enclosing div is not necessary, if not used for other purposes.
Wow, thanks for pointing that out OP. Apparently Mozilla Firefox doesn't associate the id attribute with a location in the HTML Document for elements other than <a> but uses the name attribute instead, and Google Chrome does exactly the opposite. The most cross-browser proof solution would be to either:
1.Give your anchor divs both a name and an id to ensure max. browser compatibility, like:
Go to Map <!-- Link -->
----
<div id="map" name="map"></div> <!-- actual anchor -->
Demo: http://jsbin.com/feqeh/3/edit
2.Only use <a> tags with the name attribute as anchors.
This will allow the on-page links to work in all browsers.
what happened with me is that the href does not work second time and that because I should Remove hash value first,,
take look how I resolved it
go to Content 1
function resetHref() {
location.hash = '';
}
Just resurrecting this post because I had a similar problem and the reason was something else.
In my case it was because we had:
<base href="http://mywebsite.com/">
defined on the .
Obviously, don't just remove it, because you need it if you are using relative paths.
Read more here:
https://www.w3schools.com/tags/tag_base.asp
Content 1
Content 2
Content 3
....
<a name="1"></a>Text here for content 1
<a name="2"></a>Text here for content 2
<a name="3"></a>Text here for content 3
When clicking on "Content 1" it will take directly to "Text here for Content 1.
Guaranteed!
Today being March of 2022, I had a specific occurrence of this problem that illustrates how the whole web environment is an "issue" today.
Same requirement: links that go to a section of the page.
It worked on my desktop's Chrome and Firefox, but not on my client's and neither on my Android's Chrome.
After reading multiple threads several times for a few hours, I found out that, in order for this behavior to be the most consistent across browsers and browser versions, you have to implement both things:
a container with an id, and
an anchor with a name property,
The most important part is that the anchor tag with a name, must have content inside of it.
So, you have your links
Go to section
<!-- more links -->
And you have the sections you want your links to go to
<div id="page-section">
<a name="page-section" class="collapse"> placeholder-content (important) </a>
<!-- your section content -->
</div>
Since you MUST have content inside the anchor with the name, you can then hide it in several ways.
My approach was to just set it's height to 0.
In order for the height to be effective, the anchor tag's display property should be set to block or inline-block for example.
.collapse {
height: 0px;
overflow: hidden;
display: block;
}
Finally it all worked, and I have to thank the many developers who struggle with this sort of thing (which should be much easier to do, but, the web...), and all the people who answer questions like this and share their knowledge.
This might help
JS:
function goto($hashtag){
document.location = "index.html#" + $hashtag;
}
HTML :
<li><a onclick="goto('aboutus')">ABOUT</a></li>
In my case The input tag was the problem. I implemented my tabs by input (radio buttons) which was preventing the anchor tag's behaviour.
It was like this at first (not working):
<a href="#name">
<li>
<label></label>
<input></input>
</li>
</a>
Then I removed the input tag and it worked:
<a href="#name">
<li>
<label></label>
// <input></input> <!-- removed it -->
</li>
</a>
Make sure you're not using preventDefault in javascript
Here is something that I finally got to work in IE, Chrome and Firefox.
Around any text create an anchor tag like this:
<a class="anchor" id="X" name="X">text</a>
Set "X" to whatever you want.
You must enclose something in the anchor tags such as text or an image. It will NOT work without these.
For the link, use this:
text
As for getting rid of the CSS for links using our anchor tag use something like this:
a.anchor {
color:#000;
text-decoration:none;
}
This seems to work well.
I'm very confused about how linking to an element within a page works. I'm learning the starter template for Twitter Bootstrap, and it contains the following code in the navbar:
<ul class="nav navbar-nav">
<li class="active">Home</li>
<li>About</li>
<li>Contact</li>
</ul>
I understand that within the list elements are anchor tags to #about and #contact, but where is the content defined for this? In the example site, the .starter-template div stays the same whenever I click the navbar buttons. What do I have to do to change the div whenever a navbar button is clicked? I tried doing this, but it just made a giant link as you would expect:
<a name="about">
<div class="container">
<div class="starter-template">
<h1>About.</h1>
<p class="lead">#about</p>
</div>
</div>
</a>
Thank you for any help!
~Carpetfizz
The links are placeholders. If you want to keep them the same, such as #about, you'd want to define an element in your page with that ID. For example, make a longer page, and include the following tag:
<h1 id="about">Here's the About Content</h1>
Clicking the link will jump to that spot in the page.
Wikipedia uses this approach to jump to sections in an article. For example, inspect the <span> tag containing the "See Also" text here:
http://en.wikipedia.org/wiki/Twitter_Bootstrap#See_also
However, since they are placeholders in the Bootstrap template, the idea is that you'll put in your own links as you see fit. For example, if you wanted to add a link to Yahoo, you'd enter your own HREF, like so:
Yahoo
Or target any other link in your site.
They're just placeholders. And if you want those targets to exist, you have to create the pages at the URLs they point to.
Such hash links can behave a little differently if you're developing a Single-page Application (SPA), but I think I've covered the simpler answer to what's confusing you. I.e., hash links attempt to jump to an ID within the page, but an element with that ID needs to exist for anything noticeable to occur.
This behavior is built into HTML; it's not something unique to using Bootstrap.
I have a website that is primarily used in K-12 schools. I have some social media buttons on it like Facebook 'like' and Pinterest 'pin it'. However, I'd like to have these buttons be hidden....where you have to click once on something (like an image that is covering them up but disappears when clicked....or a tab that just sort of scrolls away to reveal the buttons behind it).
The reason for this is because these sites are usually blocked in schools (I realize there's probably nothing I can do about this) and these buttons look kind of ugly when they're blocked (it'll show a question mark or or something in place of the button in these cases). However, I do want the people who do not have them blocked to be able to access and see them easily.
I am in search of a simple solution to this where the buttons wouldn't be immediately visible until you click on something.
If you're using JQuery or any other support library, you would have plenty of way to achieve your goal, even with a lot of visual effects.
Anyway, the simplest way to achieve it is by playing with the "display" attribute of the element.
Add this in your html head tag:
<script type="text/javascript>
function showElement(){
// get a reference to your element, or it's container
var myElement = document.getElementById('elementId');
myElement.style.display = '';
hideImage();
}
function hideImage(){
var myElement = document.getElementById('imageId');
myElement.style.display = 'none';
}
</script>
Now add a click event on the element you want to use to show your hidden content:
<img id="imageId" onclick="showElement()" src="..."/>
If you want to hide your "hidden" element by default, add a inline style:
<div id="elementId" style="display:none">...your buttons here...</div>
Obviously, there are a lot of better ways to achieve it (eg. changing css classes), but I think you would be able to work with the above instructions.
Edited to improve the answer:
Create an HTML structure like the following:
<div>
<img id="imageId" alt="" src="..." onclick="showElement()">
<div id="elementId" style="display:none">
<!-- your buttons, anchors or anything else you want to be hidden by default-->
</div>
</div>
So, when you click the image, the buttons appear and the image disappear.
Thanks for your help! I tried this and it works well. I think it was a pretty simple solution (even though I don't know javascript) and accomplished just what I wanted to do, which was to basically hide those buttons until an image that is covering them is clicked. Just for the record, here's the exact code I used:
<script type="text/javascript">
function showElement(){
var myElement = document.getElementById('elementId');
myElement.style.display = '';
hideImage();
}
function hideImage(){
var myElement = document.getElementById('imageId');
myElement.style.display = 'none';
}
</script>
(All I changed was adding the missing quotation mark on the first line and took out that one line about referencing to the element since I assume that is something optional.) For the html part, here's exactly what I did:
<div>
<img id="imageId" src="/images/cover.jpg" alt="cover" onclick="showElement()" width="185" height="124" />
<div id="elementId" style="display:none">
(hidden content went here)
</div>
</div>
(I didn't change much on this part either other than closing the image tag, putting in the dimensions for the image, etc.) Hopefully, I didn't do any of this wrong, but it seems to work as intended. The only other thing that would be a nice touch would be if there was a way to make it have the 'hand with pointing finger' symbol appear when you hover over it....in order to make it clear that it is a clickable image, but if not, it's not essential.