How to use CSS and D3 to achieve a heart-shaped animation effect composed of text (with code)

The content of this article is about how to use CSS and D3 to achieve a heart-shaped animation effect composed of text (with code). It has certain reference value. Friends in need can refer to it. Hope it helps.

Effect preview

Source code download

https:/ /github.com/comehope/front-end-daily-challenges

Code Interpretation

Define dom, the container contains 3 sub-elements, one in each sub-element Word:

<div>
    <span>aaa</span>
    <span>bbb</span>
    <span>ccc</span>
</div>

Centered display:

body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: black;
}

Define container size:

.love {
    width: 450px;
    height: 450px;
}

Set text style:

.love {
    position: relative;
}

.love span {
    position: absolute;
    left: 0;
    color: goldenrod;
    font-size: 20px;
    font-family: sans-serif;
    text-shadow: 0 0 1em white;
}

Define the animation of text moving left and right:

.love span {
    animation: x-move 10s ease-in-out infinite alternate;
}

@keyframes x-move {
    to {
        left: 450px;
    }
}

Define the subscript variable of the sub-element and set the animation delay so that each word enters in sequence:

.love {
    --particles: 3;
}

.love span {
    animation-delay: calc(20s / var(--particles) * var(--n) * -1);
}

.love span:nth-child(1) {
    --n: 1;
}

.love span:nth-child(2) {
    --n: 2;
}

.love span:nth-child(3) {
    --n: 3;
}

Increase the animation effect of text moving along the heart shape:

.love span {
    animation: 
        x-move 10s ease-in-out infinite alternate,
        y-move 20s linear infinite;
}

@keyframes y-move {
    0% { transform: translateY(180px); }
    10% { transform: translateY(45px); }
    15% { transform: translateY(5px); }
    18% { transform: translateY(0); }
    20% { transform: translateY(5px); }
    22% { transform: translateY(35px); }
    24% { transform: translateY(65px); }
    25% { transform: translateY(110px); }
    26% { transform: translateY(65px); }
    28% { transform: translateY(35px); }
    30% { transform: translateY(5px); }
    32% { transform: translateY(0); }
    35% { transform: translateY(5px); }
    40% { transform: translateY(45px); }
    50% { transform: translateY(180px); }
    71% { transform: translateY(430px); }
    72.5% { transform: translateY(440px); }
    75% { transform: translateY(450px); }
    77.5% { transform: translateY(440px); }
    79% { transform: translateY(430px); }
    100% { transform: translateY(180px); }
}

Next, use d3 to batch process dom elements and css variables.
Introduce the d3 library:

<script></script>

Declare an array containing several words:

const words = ['aaa', 'bbb', 'ccc'];

Use d3 to create dom elements:

d3.select('.love')
    .selectAll('span')
    .data(words)
    .enter()
    .append('span')
    .text((d) => d);

Use d3 to assign values ​​to css variables:

d3.select('.love')
    .style('--particles', words.length)
    .selectAll('span')
    .data(words)
    .enter()
    .append('span')
    .style('--n', (d, i) => i + 1)
    .text((d) => d);

Delete the relevant dom elements in the html file and the relevant css variables in the css file.

Change the array elements to the word "love" in various languages:

const words = [
    '愛', 'Love', 'Amour', 'Liebe', 'Amore',
    'Amor', 'Любовь', 'الحب', 'प्यार', 'Cinta',
    'Αγάπη', '사랑', 'Liefde', 'Dashuri', 'Каханне',
    'Ljubav', 'Láska', 'Armastus', 'Mahal', 'אהבה', 
    'Szerelem', 'Grá', 'Mīlestība', 'Meilė', 'Любов', 
    'Љубовта', 'Cinta', 'عشق', 'Dragoste', 'Láska', 
    'Renmen', 'ፍቅር', 'munaña', 'Sevgi', 'Љубав', 
    'karout', 'amà', 'amôr', 'kærleiki', 'mborayhu', 
    'Upendo', 'sòòyayyàà', 'ljubav', 'Սեր', 'сүю', 
    'сүйүү', 'tia', 'aroha', 'KHAIR', 'प्रेम', 
    'kjærlighet', 'munay', 'jecel', 'Kärlek', 'soymek', 
    'Mahal', 'ярату', 'محبت', 'sopp', 'uthando', 
    'ความรัก', 'Aşk', 'Tình yêu', 'ליבע'];

Finally, set a special text style for the first word:

.love span:first-child {
    color: orangered;
    font-size: 3em;
    text-shadow: 
        0 0 0.1em black,
        0 0 1em white;
    z-index: 1;
}

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