Some examples showing Twista Sans Variable , including CSS and JS code.

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Effects on a Paragraph

Javascript divides the text into sentences, and each sentence is highlighted when the mouse hovers over it.

AI says: Variable fonts represent a revolutionary advancement in typography, allowing designers to explore infinite variations within a single font file. The Twista Sans typeface demonstrates this flexibility beautifully, offering seamless transitions between weights. By hovering over this paragraph, you can witness how the font dynamically transforms, creating an engaging and interactive reading experience. This technology opens new possibilities for responsive design, animation, and creative expression in digital typography. The smooth interpolation between font variations provides designers with unprecedented control over their typographic choices, making variable fonts an essential tool for modern web design.

How it works

CSS
.hover-paragraph {
  font-size: 1.3rem;
  line-height: 1.8;
  font-weight: 300;
}

.hover-paragraph .sentence {
    display: inline;
    transition: all 0.4s ease;
    cursor: pointer;
}

.hover-paragraph .sentence:hover {
    font-weight: 700;
}

JS
const hoverParagraph = document.getElementById('word-paragraph');
const hoverText = hoverParagraph.textContent;
const hoverSentences = hoverText.trim().split(/(?<=[.!?])\s+/);

hoverParagraph.innerHTML = hoverSentences.map(sentence => 
    `<span class="sentence">${sentence}</span>`
).join(' ');

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Automatic sequential animation

Automatic animation through all words of the paragraph. Note the little extra delay effect. Starts from the beginnig on mouse movment.

AI says: Variable fonts represent a revolutionary advancement in typography, allowing designers to explore infinite variations within a single font file. The Twista Sans typeface demonstrates this flexibility beautifully, offering seamless transitions between weights. By hovering over this paragraph, you can witness how the font dynamically transforms, creating an engaging and interactive reading experience. This technology opens new possibilities for responsive design, animation, and creative expression in digital typography. The smooth interpolation between font variations provides designers with unprecedented control over their typographic choices, making variable fonts an essential tool for modern web design.

How it works

CSS
.auto-paragraph {
  font-size: 1.3rem;
  line-height: 1.8;
  font-weight: 300;
}

.auto-paragraph .word {
    display: inline-block;
    font-weight: 300;
    color: #333;
    transition: font-weight 0.8s ease;
}

.auto-paragraph .word.active {
    font-weight: 700;
    transition: font-weight 0.2s ease;
}

JS
const autoParagraph = document.getElementById('word-paragraph-2');
const autoText = autoParagraph.textContent;
const autoWords = autoText.trim().split(/\s+/);

autoParagraph.innerHTML = autoWords.map(word => 
    `<span class="word">${word}</span>`
).join(' ');

const autoWordElements = autoParagraph.querySelectorAll('.word');
let currentIndex = 0;

function animateWords() {
    autoWordElements.forEach(word => word.classList.remove('active'));
    autoWordElements[currentIndex].classList.add('active');
    currentIndex = (currentIndex + 1) % autoWordElements.length;
}

setInterval(animateWords, 600);

---

Proximity effect

Text highlighting effect in a circular shape around the mouse pointer.

AI says: Variable fonts represent a revolutionary advancement in typography, allowing designers to explore infinite variations within a single font file. The Twista Sans typeface demonstrates this flexibility beautifully, offering seamless transitions between weights. By hovering over this paragraph, you can witness how the font dynamically transforms, creating an engaging and interactive reading experience. This technology opens new possibilities for responsive design, animation, and creative expression in digital typography. The smooth interpolation between font variations provides designers with unprecedented control over their typographic choices, making variable fonts an essential tool for modern web design.

How it works

CSS
.proximity-paragraph {
  font-size: 1.3rem;
  line-height: 1.8;
  font-weight: 300;
}

.proximity-paragraph .word {
    display: inline-block;
    font-weight: 300;
    color: #333;
    transition: all 0.3s ease;
}

.proximity-paragraph .word.near {
    font-weight: 700;
}

JS
const proximityParagraph = document.getElementById('word-paragraph-3');
const proximityText = proximityParagraph.textContent;
const proximityWords = proximityText.trim().split(/\s+/);

proximityParagraph.innerHTML = proximityWords.map(word => 
    `<span class="word">${word}</span>`
).join(' ');

const proximityWordElements = proximityParagraph.querySelectorAll('.word');
const proximityRadius = 150;

proximityParagraph.addEventListener('mousemove', (e) => {
    const mouseX = e.clientX;
    const mouseY = e.clientY;

    proximityWordElements.forEach(word => {
        const rect = word.getBoundingClientRect();
        const wordX = rect.left + rect.width / 2;
        const wordY = rect.top + rect.height / 2;

        const distance = Math.sqrt(
            Math.pow(mouseX - wordX, 2) + Math.pow(mouseY - wordY, 2)
        );

        if (distance < proximityRadius) {
            word.classList.add('near');
        } else {
            word.classList.remove('near');
        }
    });
});

proximityParagraph.addEventListener('mouseleave', () => {
    proximityWordElements.forEach(word => word.classList.remove('near'));
});