current position:Home>Explore the magic of mask image - the searchlight effect of win10 calendar can do this!
Explore the magic of mask image - the searchlight effect of win10 calendar can do this!
2021-08-27 02:06:19 【Mr. Chen】
Brief introduction
Literally, it means mask . be familiar with PS My little friend must be interested in this “ mask ” The concept of , stay PS Can be called “ Mask ”, It is the outline of a component that specifies a layer /alpha Channel as the basis for their silhouette . stay CSS in ,mask-image
This property is based on Specifies the transparency of the element as the basis for silhouette .
according to MDN Introduction on ,mask-image
CSS Property is used to set the image of the mask layer on the element . Generally speaking , Use mask-image
The elements of usually have transparent parts , Element is used to mask the specified DOM On , The part covered by the transparent part of the element will not be displayed , The part obscured by the opaque part will display . Notice that I'm talking about elements , It's usually pictures , It can also be an element with a gradient background color , What is displayed is a picture or background color .
Let's have a simple diagram
A small example —— Progress loading animation
The progress bar is a very common component , Progress bar progress bar , It is generally strip-shaped or beautiful, and can be made into a ring . To be more personalized , Many developers will put the loading progress into Logo in , Today we use mask-image
This property simulates a similar loading effect .
because mask-image
Only opaque parts will be displayed , therefore , We just need to prepare one Logo picture , A with a background color DOM, keep Logo Layer immobility , background DOM It can be realized by moving .
- A sheet with a transparent part Logo picture
- HTML structure
<div class="mask-layer">
<div class="box"></div>
</div>
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- Set the mask layer
mask-layer
With the background layerbox
The style of
.mask-layer {
width: 300px;
height: 200px;
background: gray;
-webkit-mask-image: url('mask.png');
-webkit-mask-size: 300px 200px;
}
.box {
width: 100%;
height: 100%;
background: linear-gradient(#f1c40f,#e67e22,#e74c3c);
animation: move 10s;
}
@keyframes move {
from{
transform: translateY(100%);
}
to{
transform: translateY(0);
}
}
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Realization effect
I've seen wave effects before , Interested partners can try ~
Another example —— Win10 Calendar searchlight effect
Let's see how this works .
I think this UI It's really great ! The border of the calendar element can sense the mouse , The change of mouse position can illuminate the surrounding border ! Although I don't know how it is implemented , But our mask-image
Can achieve a similar effect !
Ideas
First put the form grid-body
Use grid Layout
Get it out , Then overlay this table with mask grid-mask
, Be careful , This mask
Not only Wide and high Want to be with grid-body
bring into correspondence with , and External location 、 Internal layout Do the same . in other words , These two layers of elements must be aligned , One layer is used to put content , Another layer to show the illuminated border .
After finishing the physical layout , on mask grid-mask
Set up mask-image
The attribute is . Here we don't use pictures , It is Radial gradient background , We draw a circular gradient background , The part outside the radius is set to transparent Of , In this way, it will cover the content of the next layer without showing it , It will illuminate the inner border of the circle !
How to perceive the mouse ? We just need to be right grid-body
binding mousemove event
, According to the position of the mouse , Dynamically change mask
The location is good !
Code section
<!-- For consistency , Everyone wants nine squares ! -->
<div class="grid-body">
<div class="grid-mask">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
<div class="grid-item">9</div>
</div>
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.grid-body {
width: 300px;
height: 300px;
padding: 10px;
box-sizing: border-box;
position: relative;
display: grid;
grid-template-columns: repeat(3,1fr);
gap: 10px;
cursor: default;
color: rgba(255, 255, 255, .8);
background-color: rgb(60, 60, 60);
}
.grid-item{
border: 3px solid transparent;
}
.grid-item:hover {
border: 3px solid rgba(255, 255, 255, .3);
}
.grid-mask {
width: 100%;
height: 100%;
padding: 10px;
box-sizing: border-box;
position: absolute;
display: grid;
grid-template-columns: repeat(3,1fr);
gap: 10px;
/* The above code is to keep the two layers consistent */
/* Set up mask-image */
/* Aperture color */
background: transparent;
-webkit-mask-image: radial-gradient(circle at center, white 0%, transparent 80px);
-webkit-mask-repeat: no-repeat;
-webkit-mask-size: 160px 160px;
pointer-events: none;
}
.grid-mask div{
border: 3px solid rgba(255, 255, 255, .5)
}
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let grid = document.querySelector('.grid-body')
let maskLayer = document.querySelector('.grid-mask')
let bounding = maskLayer.getBoundingClientRect()
grid.addEventListener('mousemove',(e)=>{
let x = e.pageX
let y = e.pageY
maskLayer.style.webkitMaskPosition = `${x - bounding.x - 80}px ${y -bounding.y - 80}px`;
})
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Realization effect
This is the test version , Then I followed Win10 The style of the calendar really wrote a few high imitation versions !
Reference material
copyright notice
author[Mr. Chen],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210827020615007q.html
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