Tag: dom

Unobtrusive JavaScript for ‘Print-This’ Links

Posted on February 1, 2009 in Function by Jeff Starr

One of the oldest JavaScript tricks in the book involves providing a “print this!” link for visitors that enables them to summon their operating system’s default print dialogue box to facilitate quick and easy printing of whatever page they happen to be viewing. With the old way of pulling this little stunt, we write this in the markup comprising the target “print this!” link in question:

<a href="javascript:window.print()">Print This!</a>

Big yuck there, of course, due to the obtrusive nature of the JavaScript implementation. Adhering to the principles of proper Web Standards, it is better practice to separate behavior from structure by placing this amazing “print this!” function in its own location, either in the <head> of the document or even better in an external JavaScript file. So basically, we want markup that looks more like this:

<a href="http://domain.tld/target/" title="Print this page">Print This!</a>

Notice the new value for the href attribute. Rather than pointing illogically to the JavaScript function, it now points to an actual resource, which may be anything you desire. Previously, users without JavaScript would click the “print this!” link and blink while nothing happens. With the unobtrusive technique, you provide the location to which users without JavaScript shall go. Possibilities here include an explanation page or even just the page itself, depending on how lazy you wanna be.

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Targeting External Links Intelligently

Posted on January 20, 2009 in Function by Bill Brown

In the beginning…

[ Young Planet Earth ] In the time of the dinosaurs, HTML authors controlled the way anchors opened by adding target="_blank" as an attribute on an anchor tag. Then the molten mass of Internet began to cool into the thin crust of Web 2.0, the continents began to separate and there came a great migration of pages from HTML to the shinier, new XHTML. Most authors didn’t know what that meant, but it had an “X” in it, so it must be cool, they thought.

Alas, there came a great despair as the beloved target="_blank" attribute was no longer looked kindly upon by The Great Validator. The new XHTML pages would not wear the Shiny Badge of Validation Love.

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Open External Links as Blank Targets via Unobtrusive JavaScript

Posted on November 20, 2007 in Function by Jeff Starr

Beginning with this article, I am serving up a short series of unobtrusive JavaScript functions that I use to enhance the functionality of Perishable Press. In this post, I present a comprehensive JavaScript method of opening external links in new windows (or tabs, depending on the browser).

One way of opening links in new windows is to insert the HTML target="_blank" attribute into all necessary anchor elements (<a href=""></a>). This method works well, but generates validation errors when used with XHTML-Strict doctypes.

A better solution is to employ some unobtrusive JavaScript to progressively enhance your documents with “blank-target” functionality. Using the following code, 99% of your visitors (those with JavaScript) will enjoy external links opening in new windows, while the remaining 1% of your audience (those without JavaScript) will enjoy your site without even realizing they are missing out on those wonderful blank-targeted links. It’s a “win-win” situation ;)

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