CSS has a variety of style sheets, while the basic styles have backgrounds, text, fonts, links, lists, tables, outlines.I. css-backgroundA solid background is allowed in CSS, and images are allowed to create complex personality backgrounds.P {background-color: #000;}A solid color is used as the background. You can then define other properties and create backgroun
Although today is only one day away from yesterday, I have grown a lot. most of the problems that I did not understand yesterday have been clarified today. to sum up ,... all are written into the code. I have to go to mathematics, so I won't write
Definition and usageIs_infinite () determines whether it is an infinite value.SyntaxIs_infinite (x) parameter descriptionX is required. Specifies the value to be checked.DescriptionIf x is infinite (positive or negative), for example, log (0)
Geometric Transformation
Geometric transformation can be seen as a change in the space position of an object (or pixel) in an image, or the movement of pixels.
Geometric operations require two steps: spatial transformation and gray-level difference.
We often get a lot of tilt pictures because we're not careful. There are many reasons, may be careless, hand shaking or shooting angle limit caused by such a picture is easy to lose the balance of the picture, always feel strange, but some photos
Step one opens the geometry artboard and uses the line segment tool to draw the square abcd.
Using the line segment tool to draw the square ABCD example
Step two draws the midpoint m of the segment AB, then the point M is centered with
03 -- css shape -- css secrets, 03 -- css secrets
Shape
An adaptive elliptic 1. Difficulties1> circleYou may have noticed that setting a border-radius sufficiently large for any square Element,You can turn it into a circle. The CSS code used is as follows:
1 # bd {2 width: 200px; 3 height: 200px; 4 background: # fb3; 5
happy to admit that I was wrong.10, there is also a empty-cells such a propertyThis property is widely supported, including IE8, which is written like this:
Table {empty-cells:hide;}
You may already know that it is used in a table, which tells the browser whether to show empty cells. Try clicking the toggle button to see how the Empty-cells works:HTML code:
Common css property records and css attributes
Common CSS attributes:
Font attributes:( Font)Size font-size: x-large; (Extra large) xx-small; (very small) generally cannot be used in Chinese, as long as the value is used, unit: PX, PDStyle font-style: oblique; (italic) italic; (italic) normal; (normal)Line-height: norm
highlight the main body is a very common method, CSS is through the Font-size property to control the size of the text, the usual unit is px (pixels). Setting the font size in CSS There are other units, such as in, CM, MM, PT, PC, and sometimes a percentage (%) to set the font size, but these units are not commonly used in actual Web page productions.3. Font styleIn CS
This article explains the details of CSS specificity (CSS specificity), which is the weight calculation of CSS style selectors.By calculating the weight of the selector (weight), it ultimately determines which selector will take precedence over the styling of the other selector, which is "priorityrules"!First, let's take a simple example:Body> ulID= "Summer-dr
This article explains the details of CSS specificity (CSS specificity), which is the weight calculation of CSS style selectors.By calculating the weight of the selector (weight), it ultimately determines which selector will take precedence over the styling of the other selector, which is "priorityrules"!First, let's take a simple example:Body> ulID= "Summer-dr
It's easy to find the path.Copy codeThe Code is as follows:Function xy45 (x1, y1) {// right-angle coordinate rotation 45 degreesVar x0 = 0;Var y0 = 0;Var s =-Math. PI/4;Var o = {};O. x = int (x0 + x1 * Math. cos (s) + y1 * Math. sin (s) + dx;O. y
Link: http://www.javaeye.com/articles/1225
In 1984, players in Europe were shocked by a game knight lore released at that time. The 2D game actually simulated the 3D environment, and the game's publishing platform was ZX Spectrum, with 48 k memory.
After the run refresh, you can also save the local direct operation can also be.
jquery navigation menu
[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]
In this paper, we describe the effect of jquery+canvas and color dynamic transformation of a simple sphere. Share to everyone for your reference, specific as follows:
The screenshot of the running effect is as follows:
The specific code is as
This paper illustrates the method of JS to move the background image of the Web page diagonally. Share to everyone for your reference. The implementation methods are as follows:
Copy Code code as follows:
js to make the background
comments and I'll be happy to admit that I was wrong.There are also empty-cells such a propertyThis property is widely supported, including IE8, which is written like this:table { empty-cells: hide;}You may already know that it is used in a table, which tells the browser whether to show empty cells. Try clicking the toggle button to see how the Empty-cells works:In this example, you need to make sure that the border of the table is visible and that the border-collapse is not set to collapsed.F
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