I know that # character within links of hyperlink tag href is used to scroll the pointed page to the specified element-id once opened:
href="//site.com/#some-id"
when used solely, means to just scroll up to the top of the current page:
href="#"
but what about when it is attached to the beginning of a link?
href="#/phones/phoneid
will it scroll the pointed page to its top once opened?
The # in a URI is used to indicate an in-page anchor on a given page.
I know that # character within links of hyperlink tag href is used to
scroll the pointed page to the specified element-id once opened:
href="//site.com/#some-id"
It's not so much that it "opens" the page and then "scrolls" to the anchor. It opens the page at the anchor - the anchor is part of the address.
when used solely, means to just scroll up to the top of the current
page:
href="#"
Yes. Kind of. But that's because you haven't stated the name of the anchor and the browser can't find it - so the browser doesn't take you to anywhere below the top of the page.
but what about when it is attached to the beginning of a link?
href="#/phones/phoneid/"
will it scroll the pointed page to its top once opened?
Well, there's no need, is there?
href="/phones/phoneid/"
will already take you to the top of the /phones/phoneid/ page.
In short, a hash-fragment is part of a web address.
The hash-fragment consists of two parts:
The hash (#)
The name of the anchor
Clicking on a URI containing a hash-fragment opens the indicated page at the indicated anchor.
Clicking on a URI which does not contain a hash-fragment opens the indicated page at the top.
If a URI contains a hash-fragment which has an invalid name (or which isn't named at all), the browser won't be able to find the anchor and will default to opening the indicated page at the top.
No it won't. You have to add the # to the end of the URL to let it scroll to the top, for example:
Text
It will search for an ID in your DOM. If there isn't an ID like this, nothing happens.
But try it yourself because this is only a speculation.
The url system currently works like this:
protocol://domain.name/resource#anchor Link
(syntax simplified for this example)
Adding another resource path after an anchor link makes no sense because the anchor link is assigned to the resource you seek, it cannot be part of the resource path.
Solution: add the # at the end of your link to make it scroll to the top.
Related
I'm writing some documentation using GitHub's built in wiki (using Markdown syntax).
The problem I have had with anchor tags is that once I have clicked that anchor once, manually scrolled down to it again, and try to click it, it won't work anymore.
a) The place where the anchor links jump to.
##<a name="listofactions">List of Actions</a>
b) An example of an anchor link
[Back to List of Actions](#listofactions)
I also tried html in markdown syntax
Back to List of Actions
And even tried linking to the full url with the # and anchor appended.
Back to List of Actions
They all work, but when I manually scroll down to the anchor link again and click it, it doesn't bring me back to (a) anymore. Unless I click on a different anchor link.
How can I write it such that the anchor links can work regardless?
There is nothing wrong with your Markdown. This is simply how browsers work. The first time you clink the link (when viewing the same page), the URL in the address bar of your browser changes from http://example.com/path/to/your/page to http://example.com/path/to/your/page#someanchor. As that is a different URL, the browser will navigate to the new URL by scrolling to the appropriate position on the page. However, as you read the page and scroll to a different position, the URL remains the same. Finally, the second time you click the link,the URL is already http://example.com/path/to/your/page#someanchor so there is no change in the URL and as far as the browser is concerned, you are already there so no navigation happens and the page does not scroll.
There may be some JavaScript tricks you can use to trick the browser into behaving as you want, but those won't work on GitHub as they won't let you include any JavaScript in your pages for security reasons.
What you could do as a workaround (assuming you have a long page and want to easily find the specific location again) is first click the [back] button (taking you back to http://example.com/path/to/your/page) in your browser's navigation bar and then click the [forward] button (returning you to http://example.com/path/to/your/page#someanchor) which should trigger the browser to navigate to the location and scroll the page.
Try this:
...
<a name="listofactions"></a>
## List of actions
Mind the blank line between the HTML tag and the markdown markup.
Then call it via [link-to-anchor](#listofactions)
Should work.
Hope to have helped!
Add the attribute target="_self"
Is there anyway to stop the address bar dropping down in mobile browsers when an anchor target extension is placed on the end of the URL?
For example when the anchor is clicked the URL would update from http://www.websiteurl.com/ to http://www.websiteurl.com/#contact causing the URL bar to drop down if it isn't already visible.
Hoping there's a solution to this one!
Thanks
"The fact of having an anchor with an href attribute is enough for Safari Mobile to show the bar unless the address is preceded by the hash sign. It is not the fact of changing the URL, because if you preventDefault() the click on the link and avoid the navigation, the bar is shown anyway."
From: http://jmperezperez.com/prevent-iphone-navigation-bar-ajax-link-click/
That page has further explanations and code. The solution seems to be to add a click handler to links ( elements) that removes the href attribute and redirects to the page through JS.
I know using iframes is not always the best idea, but for my case it makes things easier. I have a website A which contains links to other parts on the same site (using <a name=...). I have a seconds site B which has an iframe containing A. Everything works fine, except the page hyperlinks, if you click on them, nothing happens.
Does anyone know if named hyperlinks are even possible in iframe? And if yes how to make them work.
EDIT:
Seems like I wasn't clear enough. The file is named test.html (http://www.domain.com/embedded/test.html) and contains a hyperlink at the top
Examples
then somewhere at the end there is a link
<a name="examples"></a>
So when you click on the top link the page should scroll down to the bottom link. I have a second page (http://www.domain.com/index.html) with the iframe containing test.html. When hovering over the link (inside the iframe), it shows http://www.domain.com/embedded/test.html#examples. I'm not and iframe expert, but this link seems as it would rather redirect to the actual file (to #examples), rather than jumping inside the iframe. As I said before when clicking on the link nothing happens. Just tested in in Chrome and it works. Seems like this is a problem specific to Firefox.
These parts of your question make me smell something: "links to other parts on the same site (using <a name=...)" and "named hyperlinks"...
A hyperlink for moving to an other part of the same page:
Goto BOOKMARK
And an anchor (bookmark) somewhere else in the same page:
<a name="BOOKMARK"></a>
These are working in every HTML-document, regardless they were shown in the iframeor not.
I had a similar problem. I too wanted a link in an embedded page to point to a bookmark in the containing page. But I am not sure if our circumstances are exactly the same.
A local link such as
<a href="#BOOKMARK">
will only look for an anchor in the same page as the link, i.e. in the embedded page. An approach such as
<a href="containing-page.html#BOOKMARK" target="top">
will only work if your link always references the same containing page. (The target needs to be specified, to display the page outside the iframe.) I am not sure if this will meet your needs.
If you want to re-use a common bookmark name in different containing pages, as I do, the design effectively requires the destination url to be treated as a variable, and that cannot be done using pure HTML. It requires javascript or similar.
It was in fact more elegant for me to add the bookmark link to the containing page, so that I do not need to standardize my bookmark names. This does not even need javascript, just a bit of css.
What I did was to position the bookmark link over the embedded display, so that it looks like it is part of the embedded page. In this example, the iframe is fixed at the top of the page and the bookmark link positioned over its top left corner.
<iframe style="position:fixed; left:0pt; top:0pt;" src="embedded-page.html"></iframe>
<div style="position:fixed; left:0pt; top:0pt;">
My Bookmark
</div>
With a bit of css refinement, this gives some flexibility of layout. For your issue, you may need to stick with javascript.
I see on some website (like StackOverflow, yahoo, the US Homeland Security department, ...) a word associated to a link that, when clicked, not only loads a page, but also, displays that page at the exact location where the contain related to the word starts.
How can I obtain that with ASP.NET MVC? (by the way, do I need javascript for that?)
Thanks for helping
Go to the other content
<a name="jumpHere">Some content</a>
Also the URL can have /yourpage.html#jumpHere or with variables, /yourpage.html?var1=foo&var2=bar#jumpHere.
Since we're talking about the hash (#), it's usually used for jumping to a specific part of the page. Because of that, it won't reload the whole page. This is useful for web applications that move from one view to another using only AJAX. To make each view bookmarkable, JavaScript "saves" the state (what view you are on) using location.hash to the URL. The next time you open the URL, JavaScript reads it and loads the correct view. In HTML5 this is superseded by pushState.
1) Find the coordinates of the element on the page
2) window.scrollTo(x,y)
Its called an anchor tag.
Place this in your HTML.
<a name="name"></a>
If you call this URL, it will jump to that place.
html-file.html#name
See: http://www.w3schools.com/tags/tag_a.asp
You can use a named anchor to do this with HTML, without javascript. here is a link explaining this.
It is very simply done with id tag of differnt html elements
for eg :- an div element if it is having "footer" as its id and is placed at the bottom of the page then, http://url-address-to-thatpage.html#footer will load the page and scroll it too the footer. (adding the "#idoftheelement" after the page url)
It is also possible to load and scroll the page with javascript.
You need to create a named anchor within the page. This will have the result you're talking about, almost like creating a "bookmark" within a page. No javascript required.
First, create the anchor using the <a> tag with the name attribute specified (in this case, section1):
<a name="section1"></a>
Then, to link to that anchor from the same page, just use something like this:
Go to Section 1
If you're linking to that anchor from another page (in this case, mypage.html), append #section1 at the end of the url:
Go to Section 1 in MyPage.html
For more information, see here.
Another way to do it is with the "id" attribute if it's not an anchor tag you'd like to bookmark. For example:
<div id="bookmark1">Content...</div>
Then, you can link to it with an anchor tag like this:
Go to content
Or link to that spot on the page by appending a #bookmark1 to
http://yourwebsite.com/page#bookmark1
I have inspected some sites and they have a pound(#) sign in the url. What does it do?
<a href="#" >Link name</a>
It's a "fragment" or "named anchor". You can you use to link to part of a document. Typically when you link to a page, the browser opens it up at the top of the page. But you link to a section half-way down, you can use the fragment to link to that heading (or whatever).
If there is no <a name="whatever"/> tag within the page, then the browser will just link to the top of the page. If the fragment is empty, then it will also just link to the top of the page.
For a fragment only Link name, then that's just a link to the top of the current page.
You often see that kind of link used in conjuction with javascript. Standards compliant HTML requires a href attribute, but if you're planning to handle the request with javascript then "#" serves as a reasonable place holder.
... just to add a few extra useful tips.
You can access and change it with document.location.hash in JavaScript.
It can point to a named anchor (e.g. <a name="top"></a>) or to an element with a corresponding id (e.g. <div id="top"></div>).
Seeing one on its own (e.g. popup) generally means a link is being used to run JavaScript exclusively. This is bad practice.
Any a element should have a href that points to a valid resource. If one does not exist, consider using another element, such as button.
The pound sign (#) indicates to locate an anchor on the page. For example, if you include this somewhere on the page:
<a name="foo"></a>
or, more recently:
<div id="foo">*part of page*</div>
and then you click on a link on the page that has the href #foo, it will navigate to the anchor with the name or div with the id foo.
However, if you just have the href #, it will lead to the top of the page.
# indicates a link to an anchor.
I thougt I'd also mention something else:
Using '#' as the href for a link that activates JavaScript is bad because it scrolls the page to the top - which is probably not what you want. Instead, use javascript:void(0).
This links back to the page itself. It's often used with links which actually run some JavaScript.
I think most of the posters here forgot how to use Internal Links.
A typical <a> element uses an href attribute to link to an external URL/URI (website). But most new developers do not realize you can also link to internal sections of your web page by using a "#" and an identifier instead. The easiest way to do this cross-browser, is using the following HTML:
This page link...
Go to Section 1
...goes to this page location.
<a id="section1" name="section1"></a>
The "#section1" href value is called a "fragment identifier" and will appear in your browser's url when you click the link. Your page will then look for this identifier in your HTML page and automatically scroll down the page to it.
Notice I have used the anchor <a> tag as my receiver to the link. Traditionally this is how most web pages used to use these types of page links. Using anchors you avoid having to rename existing elements. It is also semantically correct and a better way to manage these types of bookmarks. But....it's ok practice to use a <div> or other HTML element with an id and name matching attribute assigned as the bookmark for the fragment identifier.
I like to use both id and name attributes with the fragment identifier, as HTML5 often does not support the name attribute on some elements, while id may not be recognized for the page marker identifier in older browsers.
This shortened, nameless version below is often used by developers as a default URL "stub" for an unknown URL added later to an anchor, to trigger a page refresh, or enable a link but let a Javascipt method capture the click event and route off somewhere else. This makes the "#" a nice fallback should the Javascript piece fail. It then becomes a nice Javascript-free refresh link. The "#" can also be a useful URL "filler for the "href" value when a missing or blank URL on an element might otherwise trigger some problem or style:
Go to the Top
The specific question was "I have inspected some sites and they have a pound(#) sign in the url. What does it do?"
An example is then given:
<a href="#" >Link name</a>
A consistent valid answer is given for jumplinks (whatever you want to call them) however the CSS :target psuedoselector would absolutely makes use of the hash in a URL as well.
It doesn't change the answers. However gives another use case I thought would be valuable, to not belabor, see the below excellent link which explains:
However, https://css-tricks.com/on-target/