I am having an issue where I believe Angular2 is interfering with how it handles normal anchor tags in HTML. I have several links within the page under "Content2" with attempts in referencing sections of that page.
<div id="navigation">
<a [routerLink]="['#section01']" fragment="section01" style=background:magenta>Section 1</a><br/>
<a [routerLink]="['#section02']" fragment="section02" style=background:cyan>Section 2</a><br/>
<a href="#section03" style=background:yellow>section 3</a><br/>
<a href="#section04" style=background:red>section 4</a><br/>
<a [routerLink]="['/content02']" fragment="section05" style=background:green>Section 5</a><br/>
</div>
My goal is to allow the navigation bar to serve as a navigation tool that sits outside of the HTML I am trying to call, but is still able to directly link sections within the HTML, in this case to Content2.
Here's the Plunker to my predicament:
https://next.plnkr.co/edit/MFtSgY0e57nAG6D5
I have even tried to reference the HTML with a direct routerLink from the navigation bar but it will not comply. I'm sure I am missing something very fundamental to Angular2 routing. Or perhaps I'm missing how the routes should have been structured in the first place.
Related
I trying to navigate from a.class1 to div.class2. But the URL is changing when the link is called. So when trying to back page, it goes back to the current page on another section.
<a RouterLink="." [fragment]="'idDiv'" class="class1"></a>
...
<div class="class2" id="idDiv"></div>
Simple add 'skipLocationChange' to your anchor tag
<a routerLink="." [fragment]="'idDiv'" class="class1" skipLocationChange></a>
You can also refer to this one: Angular 2, handle anchor links with href='#'
This question already has answers here:
Anchor or Button in React SPA?
(3 answers)
Closed 9 months ago.
I see a lot of discussion on the internet about <a> tags that look like buttons, and rules that all links must obey. However, I am confused about <button> tags that are styled to look like links.
I am creating a single-page-app and my navigation component is responsible for rendering / hiding different sections of the website. Only one section would be visible at a time, so I'm treating each section as if it was a unique page with its own route.
My navigation controls are buttons, instead of links. I did this because there is nothing valid that I'm aware of, which I can put inside the hrefs (given that the hidden content is not present in the DOM).
I read on the internet that buttons must have styling to identify the priority of the button, for accessibility reasons. Ideally, I want the buttons to look like links since they behave similarly to links (although not identical).
Are there any accessibility concerns with styling buttons to look like links? Would it make more sense to style these buttons as buttons? If they should look like buttons then what should be the priority? Does it make more sense just to hide the hidden "pages" with css, so that I can turn the buttons into <a> tags and add an href?
Here is the typical markup for single page apps
<div>
<nav>
<ul>
<li>
<button data-name="Skills">Skills</button>
</li>
<li>
<button data-name="Projects">Projects</button>
</li>
<li>
<button data-name="History">History</button>
</li>
<li>
<button data-name="Employment">Employment</button>
</li>
<li>
<button data-name="Contact">Contact</button>
</li>
</ul>
</nav>
<div id="content-panel">
Home
</div>
</div>
The part at the bottom div#content-panel represents the Home page. It will be replaced with the other pages using JavaScript, which will contain the main content of the website.
For those who stumble across this, please don't use <a> without an href, it results in an element that is not longer focusable with the keyboard.
The following fiddle shows this. Try using Tab to focus the links.
You could obviously add tabindex="0" to add them back to the focus order, but this is an anti-pattern and if you ever find yourself doing this it is an indication that you have made a mistake with your HTML.
<div>
<nav>
<ul>
<li>
<a data-name="Skills">Skills</a>
</li>
<li>
<a data-name="Projects">Projects</a>
</li>
<li>
<a data-name="History">History</a>
</li>
<li>
<a data-name="Employment">Employment</a>
</li>
<li>
<a data-name="Contact">Contact</a>
</li>
</ul>
</nav>
<div id="content-panel">
Home
</div>
</div>
If you are building a SPA in a fashion similar to that described by the OP you should still be using anchors <a> for navigation.
There are a few things you should consider:
When each section is shown you should update the URL on the site via JavaScript.
If your site also has Server Side Rendering (SSR) and can function in a limited fashion without JavaScript (recommended as JavaScript does fail more often than you think due to network errors, JS errors for certain scenarios you missed etc. etc.) then the href of the anchors should point to the correct URL.
On SPA navigation it is recommended that once the new page is loaded you programatically set focus on that pages <h1>. You can do this by adding tabindex="-1" to the <h1> (which allows it to receive focus programatically without being added to the focus order of the page) and then using header1.focus()
For an even better experience for people who use a screen reader it may also be beneficial to add an aria-live section to the page with the value of assertive that announces "loading" once a link is clicked. <div aria-live="assertive"><!--add "loading" here programatically when the link is clicked, remove it once the page has loaded--></div>
I have a reasonably long answer with a bit more detail of this technique here that explains why.
To answer the original question finally!
You can style a button to look like a link. However consistency across a site is key.
So make sure that if that is the styling you use for buttons that the majority of buttons look the same.
Also if you make a button look like a standard link then really you should make your links look different to your buttons styled as links.
This avoids confusion as a button has the expectation it will change something on the current page or submit a form, a link has the expectation of changing the page / URL / navigation.
However the advice is not quite the same for a link styled like a button. It has become acceptable that links can be styled like buttons if they are a Call To Action for example. Yet again though, consistency across a site is key for a great user experience.
As stated on MDN Navigation expects to have a links as children. So if you want to prevent any accesibility issue, I suggest you to stick to them, just remove the href attribute and add a type="button" to your a tags.
Anything that looks like something else fools the user. This applies to a link looking like a button, a link looking like plain text, an h1 looking like an h2, a ul looking like an ol, etc. When the user is fooled, the user can get confused or be misled into errors. With a link that looks like a button, for example, the user may press Space to activate it and be surprised to find that it is not activated, but instead the page is scrolled.
Normally you can specify an anchor on a page such as "index.html" with code such as:
Link Text
You can then jump to that anchor when the page is displayed by including it in the path:
http://example.com/index.html#anchor
I am developing a landing page with the Yesod Haskell framework, and would like to integrate this functionality into my landing page.
Currently I have a navigation bar with several links at the top of the page. The navbar is specified with hamlet as:
<div #navbar .collapse.navbar-collapse>
<ul .nav.navbar-nav>
<li :Just HomeR == mcurrentRoute:.active>
<a href=#{HomeR}>_{MsgHome}
Note that the href is specified with "HomeR". "HomeR" is defined in the Yesode "config/routes" file that lists all of the paths for the site.
It looks like:
/ HomeR GET
/settings SettingsR GET
Here is my problem. I can add an anchor to a section of the hamlet specification, then modify the href on the title bar to jump to that section such as:
<li :Just HomeR == mcurrentRoute:.active>
<a href=#{HomeR}#section0>_{MsgHome}
However this is annoying for several reasons. First the anchor is not checked for validity at compile time like the other paths.
Second normally the current page is highlighted on the navigation bar with the code:
<li :Just HomeR == mcurrentRoute:.active>
With this approach I can highlight for individual pages, but not individual anchors within a page.
Is there a way to insert safe anchors into the Yesod config/routes file. Or is it only possible to have a route with actual pages. This would allow jumping to sections of the page in the navbar, then highlighting the section that was clicked on. If this is not possible is there a better way to deal with page anchors in yesod?
I am creating a website with navigation that causes a page-jump. But when the page-jump event is executed my page will not load properly, and most content above the called is not loaded. Here is a copy of my navigation:
<div id="navbar-type">
<ul>
<li>BEAR SOUP</li>
<li>FIAT MOTORS</li>
<li>NEWSEUM</li>
<li>TEXAS PARKS</li>
<li>ZACH THEATRE</li>
<li>GUINNESS</li>
</ul>
</div>
How can I fix the code so that the items above the page-jump are visible?
Thanks
you just need to put <a name="bear-logo"> where you want the page to scroll to when the user clicks the link and the same for the others. For example, if you wanted to scroll to the <p> tag below, you could do it like this:
BEAR SOUP
<!--More Code-->
<a name="bear-logo">
<p>Bear Soup:</p>
There doesn't seem to be any error in the displayed HTML. However, you shouldn't need to include the target for inline page anchors.
I assume you actually have the links on the page. For example, <a id="bear-logo"></a>, <a id="fiat-logo"></a>, and so on.
Moreover, the issue you describe seems to indicate that there is some invalid code elsewhere on the page (perhaps JS or jQuery). I'd recommend commenting out sections of your HTML until you isolate the interfering culprit.
BTW, have you considering using a simple jQuery script to flow the navigation to the logos instead of just abruptly jumping to them?
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.