Can anyone help explain what this CSS means

The identifier for a CSS filter is "filter".

The syntax is: filter:filtername(parameters)parameters are the parameters that represent the properties of each filter.

So the alpha above is the name of the filter, and the alpha filter is used to set the transparency.

The rest is all its parameters.

opacity stands for the transparency level, and the optional values range from 0 100 to 0 for complete transparent and 100 for complete opacity.

style represents the shape feature of the transparent area. where 0 represents a uniform shape, 1 represents linear, 2 represents a circular radial gradient, and 3 represents a rectangular radial gradient.

Completely hand-typed, I just happened to have just learned this today, and I will give it to me.

filter is a filter.

The alpha behind (opacity is the transparency of the control) and the left is the distance from the left.

visibility: hidden.

position: absolute positioning.

TOP distance from the upper part.

filter:alpha(opacity=70);opacity means transparency; It is recommended to add one at the end; Because the filter is only known to IE browsers, other browsers support opacity;

position:absolute; top:60px; left:710px;This means that this layer uses absolute positioning, 60px from the top of the browser and 710px from the left;

width:85px;The width of this layer is 85 pixels; height:79px;The height of the layer.

visibility: Sets whether an element is visible or not. The hidden attribute hides content beyond the bounds of the layer's borders.

What CSS means is as follows:

CSS is a cascading style sheet.

Cascading Style Sheets (CACADING Style Sheets) is a computer language used to express file styles such as HTML (an application of the Standard Universal Markup Language) or XML (a subset of the Standard Common Markup Language). Use the notepad that comes with the Windows system to make the web page bright.

You only need to save the document with the HTML suffix when you save it.

CSS can not only decorate web pages statically, but also dynamically format various elements of web pages with various scripting languages. CSS provides pixel-precise control over the placement of elements in a web page, supports almost all font size styles, and has the ability to style web page objects and models.

How it works: CSS is a language that defines style structures, such as fonts, colors, bits, etc., and is used to describe the way information is formatted and displayed on web pages. CSS styles can be stored directly on an HTML web page or in a separate style sheet.

Either way, a style sheet contains rules for applying a style to an element of a specified type. When used externally, the style sheet rules are placed in an external style sheet document with a file extension css.

Style rules are formatting instructions that can be applied to elements in a web page, such as paragraphs of text or links. A style rule consists of one or more style attributes and their values. The internal style sheet is placed directly in the web page, the external style sheet is saved in a separate document, and the web page links to the external style sheet via a special tag.

Specifically, the styles in the CSS style sheet form a hierarchy, and more specific styles override the generic styles, thus achieving a cascading effect.

CSS is a computer language used to express file styles such as HTML (an application of the Standard Universal Markup Language) or XML (a subset of the Standard Universal Markup Language).

CSS can not only decorate web pages statically, but also dynamically format various elements of web pages with various scripting languages.

CSS provides a style description for the HTML markup language that defines how elements are displayed in it. CSS is a breakthrough in the field of web design. It can be used to modify a small style and update all the page elements associated with it.

CSS has the following features:

1. Rich style definition.

CSS provides a rich look and feel for document styles, as well as the ability to set text and background properties; Allows you to create borders for any element, as well as the distance between the element's borders and other elements, and the distance between the element's borders and the element's content; Allows you to change the capitalization of the text, the way it is retouched, and other page effects.

2. Easy to use and modify.

CSS can define styles in the Style attribute of HTML elements, in the header section of an HTML document, or in a dedicated CSS file for HTML page reference. In short, CSS style sheets can store all style declarations in a unified manner for unified management.

3. Multi-page application.

CSS stylesheets can be stored separately in a single CSS file, so that we can use the same CSS stylesheet on multiple pages. CSS stylesheets are theoretically not part of any page file, and can be referenced in any page file. This makes it possible to achieve a uniform style across multiple pages.

4. Cascade. Cascading is when an element is styled multiple times, which uses the last property value set. For example, if you use the same set of CSS stylesheets for multiple pages in a site, and you want to use other styles for certain elements on some pages, you can define a separate stylesheet for those styles and apply them to the page.

5. Page compression.

In the use of HTML to define the effect of the page, it is often necessary to have a large number of or duplicate ** and font elements to form a text style of various specifications, and the consequence of this is to produce a large number of HTML tags, which increases the size of the page file.

Placing style declarations in a separate CSS stylesheet can greatly reduce the size of the page, which will greatly reduce the time it takes to load the page. In addition, the reuse of CSS stylesheets reduces the size of the page and reduces the time.