The role of zoom:1 in CSS, small tags have a big impact_html/css_WEB-ITnose

The role of zoom:1 in CSS
Compatible with IE6, IE7, and IE8 browsers. We often encounter some problems. You can use zoom:1 to solve them. It has the following functions:
Trigger the haslayout
of IE browser to solve some problems such as floating and margin overlap under IE.

The role of zoom in css
1. Check whether the label of the page is closed
Don’t underestimate this, maybe it’s a CSS BUG problem that you haven’t solved for two days, but it’s just caused by here. After all, page templates are usually nested by developers, and they can easily make such problems.
Quick Tip: You can use Dreamweaver to open the file to check. Generally, if there are no closed tags, they will be highlighted with a yellow background.

　2. Style elimination method
Some complex pages may load N external link CSS files, then delete the CSS files one by one, find the specific CSS files triggered by the BUG, ​​and narrow the scope of locking.

For the problematic CSS style file just locked, delete the specific style definitions line by line, locate the specific trigger style definition, and even the specific trigger style attributes.

3. Module confirmation method
Sometimes we can also start from the HTML elements of the page. Delete different HTML modules in the page and find the HTML module that triggers the problem.

4. Check whether floats are cleared
In fact, there are many CSS BUG problems caused by not clearing floats. It is necessary to develop a good habit of clearing floats. It is recommended to use the method of clearing floats without additional HTML tags (try to avoid using similar methods like overflow:hidden;zoom:1 to clear floats, which will be too restrictive).

　5. Check whether haslayout is triggered under IE
Many complex CSS BUGs under IE are closely related to IE’s unique haslayout. Familiarity and understanding of haslayout will help you solve complex CSS bugs with half the effort. It is recommended to read "On having layout" translated by old9 (if you can't cross the great GFW, you can read the repost on the blue)
Quick tip: If haslayout is triggered, go to the properties in IE's debugging tool IE Developer Toolbar A haslayout value of -1 will be displayed.

6. Border and background debugging method
As the name suggests, it is to set a conspicuous border or background (usually black or red) for the element for debugging. This method is one of the most commonly used methods for debugging CSS bugs, and it is still applicable to complex bugs. Affordable and environmentally friendly^^
The last thing I want to emphasize is that developing good writing habits, reducing extra tags, being as semantic as possible, and complying with standards can actually save us a lot of extra complex CSS BUGs. More often than not, It is we who create the trouble for ourselves. I hope you stay away from bugs and your life becomes better and better.

This article is from: http://www.cnblogs.com/top5/archive/2011/07/11/2103343.html