Yesterday I was working on a site that needed an iframe embedded in the page whose content came from a completely different domain. I try to steer clear of iframes at all costs normally so forgive me if what I’m about to say is pretty obvious.
I didn’t want the content in the iframe to appear as though it was in an iframe, so obviously I stripped off all the default browser styles…well, the border. I wanted the iframe to be as high as the content it was containing so that no scroll bars would appear.
So what I did was just give the iframe a height, however when the user navigated to a different page within the iframe, the height I had previously set was too big or too small.
I instantly thought “right, JavaScript will sort this out for me!” and proceeded to quickly code up a function that would inspect the scrollHeight of the content in the iframe and adjust the iframe height accordingly.
No! Said cross domain policy. I had momentarily forgotten all about that. Since the iframe content came from a different domain, I wasn’t allowed to access the document object of the iframe (or vice versa).
Firefox says “Error: Permission denied to access property ‘document’” and other browsers similar.
I started searching for some kind of workaround. Of course there isn’t really one…except I did find an interesting hack for Firefox. Which is – an iframe document can alter the url fragment of the parent window’s location object! ha madness.
The idea is that the document in the iframe alters the url fragment to read:
http://freestyle-developments.co.uk/blog/?p=150#138
Where 138 is the height of the iframe document (obviously you could be a bit more fancy and send other parameters and name them e.g #height:138 but for simplicity I’ve just set the value). The parent then reads this value and sets the iframe height accordingly:
var iFrameHeight = parseInt(location.hash.replace('#', ''));
So…yeah, that’s pretty interesting, but not really a solution. Check out the example implementation here.
Anyway, what to do? HTML5 web messaging to the rescue! Sweet! HTML5 web messaging is cross domain messaging done right. Not only does the messenger choose who should receive messages, but the recipient also chooses who to receive messages from.
The idea is that after the iframe document has loaded, it sends a message to the parent window telling it what it’s scrollHeight is. The parent listens for messages, and sets the height of the iframe when it receives a message.
A couple of things to note:
- There has to be communication between the two documents. i.e. the document on the external domain needs to actively send this message. Which can be a complete show stopper if you have no control over the document on the external domain
- This isn’t going to work on IE < 9. I tested the implementation linked below is working on FireFox 4 (Beta 7), Safari 5.0.2, Chrome 8, Opera 10.63 and Internet Explorer 9 Platform Preview 7. Which is a pretty good spread to be honest
Check out the example HTML5 web messaging implementation here.
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# Harvard University: A Legacy of Excellence and Innovation
## A Brief History of Harvard University
Founded in 1636, **Harvard University** is the oldest and
one of the most prestigious higher education institutions in the United States.
Located in Cambridge, Massachusetts, Harvard has built a global reputation for academic excellence, groundbreaking research,
and influential alumni. From its humble beginnings as a small college
established to educate clergy, it has evolved into a world-leading university that
shapes the future across various disciplines.
## Harvard’s Impact on Education and Research
Harvard is synonymous with **innovation and intellectual leadership**.
The university boasts:
- **12 degree-granting schools**, including the renowned **Harvard Business School**, **Harvard
Law School**, and **Harvard Medical School**.
- **A faculty of world-class scholars**, many of whom are Nobel laureates,
Pulitzer Prize winners, and pioneers in their fields.
- **Cutting-edge research**, with Harvard leading initiatives in artificial intelligence, public health, climate change, and more.
Harvard’s contribution to research is immense,
with billions of dollars allocated to scientific discoveries and
technological advancements each year.
## Notable Alumni: The Leaders of Today and Tomorrow
Harvard has produced some of the **most influential figures** in history, spanning politics, business, entertainment, and science.
Among them are:
- **Barack Obama & John F. Kennedy** – Former U.S. Presidents
- **Mark Zuckerberg & Bill Gates** – Tech visionaries (though Gates did not graduate)
- **Natalie Portman & Matt Damon** – Hollywood icons
- **Malala Yousafzai** – Nobel Prize-winning activist
The university continues to cultivate future leaders who shape industries and drive global progress.
## Harvard’s Stunning Campus and Iconic Library
Harvard’s campus is a blend of **historical charm and modern innovation**.
With over **200 buildings**, it features:
- The **Harvard Yard**, home to the iconic **John Harvard Statue** (and
the famous “three lies” legend).
- The **Widener Library**, one of the largest university libraries in the world, housing **over 20 million volumes**.
- State-of-the-art research centers, museums,
and performing arts venues.
## Harvard Traditions and Student Life
Harvard offers a **rich student experience**,
blending academics with vibrant traditions, including:
- **Housing system:** Students live in one of 12 residential houses, fostering a strong sense
of community.
- **Annual Primal Scream:** A unique tradition where students de-stress by running
through Harvard Yard before finals!
- **The Harvard-Yale Game:** A historic football rivalry that unites alumni and students.
With over **450 student organizations**, Harvard students engage in a diverse range
of extracurricular activities, from entrepreneurship to performing arts.
## Harvard’s Global Influence
Beyond academics, Harvard drives change in **global policy, economics, and technology**.
The university’s research impacts healthcare, sustainability,
and artificial intelligence, with partnerships across industries worldwide.
**Harvard’s endowment**, the largest of any university, allows it to
fund scholarships, research, and public initiatives, ensuring a legacy of impact for generations.
## Conclusion
Harvard University is more than just a school—it’s a **symbol of excellence, innovation, and leadership**.
Its **centuries-old traditions, groundbreaking discoveries,
and transformative education** make it one of the most influential
institutions in the world. Whether through its distinguished
alumni, pioneering research, or vibrant student life, Harvard continues to
shape the future in profound ways.
Would you like to join the ranks of Harvard’s legendary scholars?
The journey starts with a dream—and an application!
https://www.harvard.edu/
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