Front-end daily combat: # 20 video demonstrates how to create a pixel art style love for the Mother's Day with pure CSS

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https://codepen.io/comehope/pen/LmrZVX

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https://scrimba.com/p/pEgDAM/cPd9asV

Source code download

Please download from github.

https://github.com/comehope/f...

Code Reading

Defined dom, heart-shaped pattern of pixels depicting 8 rows 9, wherein <dot> is simply more fill color pixel of:

<div class="heart">
    <!-- line 1 -->
    <span></span>
    <dot></dot>
    <dot></dot>
    <span></span>
    <span></span>
    <span></span>
    <dot></dot>
    <dot></dot>
    <span></span>

    <!-- line 2 -->
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <span></span>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>

    <!-- line 3 -->
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>

    <!-- line 4 -->
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>

    <!-- line 5 -->
    <span></span>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <span></span>

    <!-- line 6 -->
    <span></span>
    <span></span>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <span></span>
    <span></span>

    <!-- line 7 -->
    <span></span>
    <span></span>
    <span></span>
    <dot></dot>
    <dot></dot>
    <dot></dot>
    <span></span>
    <span></span>
    <span></span>

    <!-- line 8 -->
    <span></span>
    <span></span>
    <span></span>
    <span></span>
    <dot></dot>
    <span></span>
    <span></span>
    <span></span>
    <span></span>
</div>

Centered:

html,body{
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(silver, white);
}

Setting heart-shaped style:

.heart {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    grid-gap: 2px;
}

.heart > * {
    width: 1em;
    height: 1em;
    border-radius: 0.1em;
    font-size: 30px;
}

.heart dot{
    background: red;
}

Definition of fade animation:

.heart dot{
    filter: opacity(0);
    animation: animation 5s ease-out infinite;
}

@keyframes animation{
    0%{
        filter: opacity(0);
        transform: translateY(-10em);
    }

    25%{
        filter: opacity(1);
        transform: translateY(0);
    }

    75%{
        filter: opacity(1);
        transform: translateY(0);
    }

    100%{
        filter: opacity(0);
        transform: translateY(10em);
    }
}

Finally, let each pixel admission at different times, enhanced animation:

.heart dot:nth-of-type(2n) {
    animation-delay: 0.2s;
}

.heart dot:nth-of-type(3n) {
    animation-delay: 0.3s;
}

.heart dot:nth-of-type(4n) {
    animation-delay: 0.4s;
}

.heart dot:nth-of-type(5n) {
    animation-delay: 0.5s;
}

.heart dot:nth-of-type(6n) {
    animation-delay: 0.6s;
}

.heart dot:nth-of-type(7n) {
    animation-delay: 0.7s;
}

.heart dot:nth-of-type(8n) {
    animation-delay: 0.8s;
}

.heart dot:nth-of-type(9n) {
    animation-delay: 0.9s;
}

.heart dot:nth-of-type(10n) {
    animation-delay: 1.0s;
}

.heart dot:nth-of-type(11n) {
    animation-delay: 1.1s;
}

We're done!

Knowledge Point

• grid-template-columns https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-columns
• grid-gap https://developer.mozilla.org/en-US/docs/Web/CSS/grid-gap
• :nth-of-type() https://developer.mozilla.org/en-US/docs/Web/CSS/:nth-of-type
• animation-delay https://developer.mozilla.org/en-US/docs/Web/CSS/animation-delay
• translateY() https://developer.mozilla.org/en-US/docs/Web/CSS/transform-function/translateY
• filter https://developer.mozilla.org/en-US/docs/Web/CSS/filter