How to set the transparency of div in css

How to set div transparency in css: first create a new html file; then create two divs and set their class attributes to div1 and div2 respectively; finally use the opacity or "-moz-opacity" attribute to set the two divs The transparency is enough.

The operating environment of this article: Windows7 system, HTML5&&CSS3 version, Dell G3 computer.

Create a new html file, named test.html, to explain how to adjust the transparency of div in css.

In the test.html file, create two divs and set their class attributes to div1 and div2 respectively, which will be used to set the style of the class name using css below.

Use css to uniformly set the two divs to be absolutely positioned at the top of the page and float to the left. This layout allows two divs to overlap, and you can see obvious effects when setting transparency.

Use css to set the width of the div with the class name div1 to 400px, the height to 200px, and the background color to yellow.

Use css to set the width of the div with the class name div2 to 100px, the height to 100px, and the background color to green.

Use css to set the transparency of the div with the class name div2. Use the filter attribute setting for IE browser, use the -moz-opacity attribute setting for Firefox browser, and use the opacity attribute setting for other browsers. The smaller the transparency value, the more transparent it is. For example, below set the div transparency to 30%

Open the test.html file in the browser to see the effect of the div with transparency set.

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