Introduction to the filter attribute in CSS3-CSS Tutorial-php.cn

Introduction to the filter attribute in CSS3

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Release： 2018-07-02 10:11:48

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This article mainly introduces relevant information about the powerful filter (filter) attribute in CSS3. Friends who need it can refer to it

The blogger recently discovered a very powerful feature in the process of building a website. The CSS3 attribute is the filter attribute. Friends who like p-pictures should know what kind of artifact this is by looking at the name. Of course, the effect of this attribute cannot be compared with that of PS, but if used well, one picture can be made into the effect of two pictures while saving a lot of space.

1. Definition　

Filter literally means filter. The official filter attribute defines an element (usually < img>) visual effects (such as blur and saturation); for example:

<style>
    img{
　　　　　　/*灰度100%*/
        -webkit-filter:grayscale(100%);
    }
</style>
<img src="img/boke.png" alt="">

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Seeing this effect, have bloggers started to become interested in filters?

2. Syntax

As you can see, the attribute has many optional values, what are they? What does it mean?

grayscale grayscale
sepia brown (a retro old photo feel)
saturate saturation
hue-rotatehue rotation
invert reverse color
opacitytransparency
brightness
contrast
blur
drop-shadow

For example:

Use sepia to adjust here

 <head>
     <meta charset="UTF-8">
      <title>Title</title>
      <style>
          .img{

             -webkit-filter:sepia(70%);
          } 
      </style>
  </head>
 <body>
 <img src="img/boke.png" alt="">
 <img class="img" src="img/boke.png" alt="">
 </body>

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Sample picture:

3. Example

The following is an example of several values of the filter attribute. Others Fun things need to be discovered by fellow bloggers. If you have any fun things, you can share them with me.

(1)hue-rotate(color rotation)

See the effect Picture bar, the specific use effect depends on everyone to discover:

     <style>
          .img{
              -webkit-filter:hue-rotate(330deg);
          }
      </style>
  </head>
  <body>
  <img src="img/boke.png" alt="">
  <img class="img" src="img/boke.png" alt="">
 </body>

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Effect picture:

(2)blur(blur)

blur (blur effect, unit px)

     <style>
          .img{
            -webkit-filter:blur(1px);
          }
      </style>
  <body>
  <img src="img/boke.png" alt="">
  <img class="img" src="img/boke.png" alt="">
 </body>

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Sample picture:

(3)invert reverse color

invert invert will turn the picture into a negative. It is useless to say more. Look at the code:

 <style>
        .img{
            -webkit-filter:invert(100%);
        }
    </style>
<body>
<img src="img/boke.png" alt="">
<img class="img" src="img/boke.png" alt="">
</body>

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Sample picture:

The above is the entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

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