Introduction
Today, we will be learning something about accessiblity. Well, some people may think that it's not important browsers has the zoom in and zoom out functionality anyway, oh well, that's quite true but design wise, when you use the zoom feature on browsers, it's more likely to ruin your design as well. So, we have this javascript font resizer that allow you to resize some section of your text instead of everything.
This tutorial focuses more on the javascript, so the HTML and CSS are really basic.
1. HTML
Alright, we just have to make sure the class name is correct, and then you can style it up with images and hover effect.
<a href="#" class="fontSizePlus">A+</a> | <a href="#" class="fontReset">Reset</a> | <a href="#" class="fontSizeMinus">A-</a>
2. CSS
Shortest CSS ever! I set the default font size to 14px. It doesn't matter if you specified the font size in percentage.
body { font-size:14px; font-family:arial; } a { color:#c00; text-decoration:none; } a:hover { color:#f00; text-decoration:underline; }
3. Javascript
Lastly, the magical jQuery! Don't freak out because of the length, 50% of the code is comments and it's very simple.
$(document).ready(function () { //min font size var min=9; //max font size var max=16; //grab the default font size var reset = $('p').css('fontSize'); //font resize these elements var elm = $('p.intro, p.ending'); //set the default font size and remove px from the value var size = str_replace(reset, 'px', ''); //Increase font size $('a.fontSizePlus').click(function() { //if the font size is lower or equal than the max value if (size=min) { //decrease the size size--; //set the font size elm.css({'fontSize' : size}); } //cancel a click event return false; }); //Reset the font size $('a.fontReset').click(function () { //set the default font size elm.css({'fontSize' : reset}); }); }); //A string replace function function str_replace(haystack, needle, replacement) { var temp = haystack.split(needle); return temp.join(replacement); }
Conclusion
Easy isn't it? You can style up the "increase font size" and "decrease font size" with icons to make it more presentable. jQuery has definitely change the way we code javascript, back to the old day, this piece of code wouldn't able to achieve such a easy and short code.
BestHostingSearch.com, a top web hosting review site, has added this feature to all of their articles by following this tutorial, which allows readers to adjust the font size handy and makes the reading easily.
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