CSS Reset

CSS GLOBAL RESETS

What is CSS reset?

All browsers have a default style sheet.

The problem is that these default style sheets are different in each browser.

CSS resets aim to remove all browser-specific styles, and then build CSS up again from scratch - so that each element will appear the same in all browsers.

The simplest reset involves removing the margin and padding from all elements using the universal selector. * { margin: 0; padding: 0; }

However, this reset can adversely affect some form elements that should not have their margins and padding removed.

Modern CSS resets aim to: • Set margins and padding to zero • Set borders to zero • Remove visual list styles • Set fonts to a base • Set font-weight and font-style to normal

Two of the most widely used CSS resets are: Eric Meyer Reset http://meyerweb.com/eric/thoughts/2007/05/0 1/reset-reloaded/ YUI 2: Reset CSS http://developer.yahoo.com/yui/reset/

Are CSS resets a good idea?

Some people love global resets, and others hate them. There is no right or wrong, only opinions!

I have three main concerns with CSS resets

Every element that is “zeroed” must then be redefined. This can cause an increase in CSS file size.

CSS Resets can present issues if you remove the default behaviour for an element and then forget to restyle it.

Some resets can be harmful to users who use keyboards for navigation. :focus {outline: 0;}

A lighter CSS reset example

I prefer to use a smaller set of CSS rules that mean that only common or problematic elements are reset.

1. Remove margin and padding on some key elements only html, body, ul, ol, li, form, fieldset, legend { margin: 0; padding: 0; }

2. Remove top margins on headings and paragraphs h1, h2, h3, h4, h5, h6, p { margin-top: 0; }

3. Remove fieldset and image borders fieldset, img { border: 0; }

4. Set table borders and spacing table { border-collapse: collapse; border-spacing: 0; }

5. Set caption, table header and table data cells caption, th, td { text-align: left; vertical-align: top; font-weight: normal; }

6. Apply color to fieldset (to overcome IE color issues) legend { color: #000; }

7. Apply font-size and line-height to input, textarea and select input, textarea, select { font-size: 110%; line-height: 1.1; }

8. Remove list bullets li { list-style: none; }

9. Apply border-bottom and cursor to abbr and acroynm abbr, acronym { border-bottom: .1em dotted; cursor: help; }

10. Vertical-align sup and sub to avoid line-height issues sup { vertical-align: text-top; } sub { vertical-align: text-bottom; }

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CSS Reset

by Russ Weakley on Apr 22, 2010

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CSS Reset — Presentation Transcript