Rony's

Archive for the ‘HTML’ Category

Well, I had a requirement to show a preview of image, whenever client selects an image inside a form. First I thought it was just a easy task… But it really took about one hour of me to figure the way out…

As it was an input element with type=file, I simply tried to get the value and push it to an image element’s source attribute attaching ‘file://’ at the beginning. But life’s not that easy! The value only returns the file name not the full path. How can I get the full path??!! I can see the path on the input box, but I can’t get it!!!

Next approach, go to our best friend, Google! Well, I guess she wasn’t very pleased with me and didn’t help me very much…

Now what?! Well, let’s try the DOM inspector of Firefox. There I found three functions for the file input element.

• getAsBinary()
• getAsDataURL()
• getAsText()

They are all self explanatory… My head was already stuck at that moment. So I didn’t see the ‘Data URL’ function first. Tried to parse binary for a while. But couldn’t find a way to push the binary data of an image inside the image tag. Then I noticed the next function. Well, it worked like a charm. I just pushed the function’s return value to the image tag’s source attribute. Done.

So, to get the file path, the call should be like:

file_input_element_id.files[0].getAsDataURL()

That’s all…

N.B. For IE, it works OK with adding the ‘file://’ before the value of input element. You just need to have proper permission level.

Mootools’ “Selectors” utility has some really strong feature. It really saves a lot of time and sweat. Using this property, one can select a tag (any one can!), tag with specific name, id or any other attribute (huh!) and most amazingly part of a property value matching to some string…

Say you want to select all the div tags which has ID starting with ‘my’. How can you do that? Read the rest of this entry »

This is a great CSS framework I’ve found online. Its optionality, and ease of use amazed me. This is mainly a grid based framework. You just create your element (e.g. div, span) and attach a class that corresponds to the disired width of your element. Thats it.

This really worth a visit…