Common error prevention tips when designing web pages with CSS (Collection)

The content of this article is about common error prevention techniques (collection) when designing web pages with CSS. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. Check whether there are spelling errors in HTML elements and whether the closing tag is forgotten

Even veterans often make mistakes in the nesting relationship of divs. You can use Dreamweaver's verification function to check for errors.

2. Check whether the CSS is correct

Check whether there are any spelling errors, whether you forgot the ending }, etc. You can use CleanCSS to check CSS for spelling errors. CleanCSS is a tool to reduce weight for CSS, but it can also check for spelling errors.

3. Determine where the error occurred

If the error affects the overall layout, you can delete the div blocks one by one until the display returns to normal after deleting a certain div block. You can determine where the error occurred.

4. Use the border attribute to determine the layout characteristics of the error element

Using the float attribute for layout may cause errors accidentally. At this time, add the border attribute to the element to determine the element boundary, and the cause of the error will be revealed.

5. The parent element of a float element cannot specify the clear attribute

Under MacIE, if the clear attribute is used on the parent element of a float element, the layout of the surrounding float elements will be chaotic. This is a famous bug of MacIE. If you don't know it, you will take detours.

6. Note that float elements must specify the width attribute

Many browsers have bugs when displaying float elements without specified width. So regardless of the content of the float element, the width attribute must be specified for it.

In addition, try to use em instead of px as the unit when specifying elements.

7. Note that float elements cannot specify attributes such as margin and padding.

IE has a bug when displaying float elements with margin and padding specified. Therefore, do not specify margin and padding attributes on float elements (you can nest a div inside the float element to set margin and padding). You can also use hacks to specify extraordinary values ​​for IE.

8. Make sure the sum of the widths of float elements is less than 100%

If the sum of the widths of float elements is exactly 100%, some ancient browsers will not display properly. Therefore, please ensure that the sum of the widths is less than 99%.

9. Check whether the default style has been reset

Some attributes such as margin, padding, etc. will be interpreted differently by different browsers. Therefore, it is best to set all margin and padding to 0, list style to none, etc. before development.

10. Check whether you forgot to write the DTD

If the display results of different browsers are still different no matter how you adjust it, then you can check whether you forgot to write the following line of DTD at the beginning of the page:

< ! DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 TransITional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\" > ;

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