HEADER ANIMATION
Drop-in prompt to add the React Bits TechText wordmark to any React app. Letters turn into dashed vector outlines under the pointer, with a selection frame, specks and draggable letters that spring back.
Free to copy. Paste the whole thing into your AI coding tool.
## Integrate the <TechText /> component from React Bits
You are helping integrate an open-source React component into an existing application.
### Component: TechText
### Variant: JavaScript + CSS
---
### Usage Example
```jsx
import TechText from './TechText';
<div style={{ width: '100%', height: '480px', position: 'relative' }}>
<TechText
text="React Bits"
fontWeight={600}
fontSize={150}
reveal="letter"
dashLength={4}
dashGap={2}
specks={15}
/>
</div>
```
### Props
| Prop | Type | Default | Description |
|------|------|---------|-------------|
| text | string | 'React Bits' | The wordmark to render. |
| fontFamily | string | '' | Any font family loaded on the page. Leave empty to inherit the font of the container. |
| fontWeight | number | 600 | Weight of the wordmark. |
| fontSize | number | 150 | Largest font size in px. The wordmark shrinks to fit narrower containers. |
| letterSpacing | number | -0.05 | Extra space between letters, in em. |
| color | string | '#ffffff' | Colour of the letters and their outlines. |
| accentColor | string | '#ffffff' | Colour of the selection frame, connector and labels. |
| reveal | 'area' | 'letter' | 'off' | 'letter' | Area fades the letters into outlines inside a circle around the pointer. Letter turns only the active letter into its outline. Off keeps every letter solid. |
| reach | number | 200 | Radius around the pointer where the letters turn into vector outlines, in px. |
| softness | number | 0.7 | How gradually the fill hands over to the outlines. 0 is a hard edge. |
| dashLength | number | 4 | Length of each outline dash, in px. |
| dashGap | number | 2 | Space between outline dashes, in px. |
| lineStyle | 'dashed' | 'solid' | 'dashed' | How the outlines under the pointer are drawn. Only the outer silhouette is traced either way. |
| strokeWidth | number | 1.5 | Thickness of the outline, in px. |
| specks | number | 15 | Tiny squares that blink and respawn around the active letter, seeded per letter. 0 turns them off. |
| selection | boolean | true | Frame the letter under the pointer. The frame glides from letter to letter. |
| labels | boolean | true | Label the frame with the letter and its size, or with its offset while dragged. |
| draggable | boolean | true | Let letters be dragged off the baseline. They spring back home on release. |
| sweep | boolean | true | Sweep the reveal across the wordmark on its own while the pointer is away. |
| speed | number | 1 | Speed of the idle sweep. |
| className | string | '' | Extra classes on the container. |
| style | CSSProperties | - | Inline styles on the container. |
### Full Component Source
```jsx
'use client';
import { useEffect, useRef } from 'react';
import './TechText.css';
const LABEL_FONT = '10px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace';
const FALLOFF_STEPS = 8;
const SPRING = 320;
const DAMPING = 22;
const approach = (current, target, dt, seconds) => current + (target - current) * (1 - Math.exp(-dt / seconds));
const hexToRgb = hex => {
let h = String(hex || '').replace('#', '');
if (h.length === 3) h = h.replace(/./g, c => c + c);
const n = parseInt(h.slice(0, 6), 16);
return Number.isNaN(n) ? [255, 255, 255] : [(n >> 16) & 255, (n >> 8) & 255, n & 255];
};
const rgba = (hex, alpha) => {
const [r, g, b] = hexToRgb(hex);
return `rgba(${r}, ${g}, ${b}, ${alpha})`;
};
const noise = (...values) => {
let h = 2166136261;
for (const value of values) {
h = Math.imul(h ^ (value | 0), 16777619);
h ^= h >>> 13;
h = Math.imul(h, 0x5bd1e995);
h ^= h >>> 15;
}
return (h >>> 0) / 4294967296;
};
const signed = value => (value > 0 ? `+${value}` : value < 0 ? `−${-value}` : '0');
const TechText = ({
text = 'React Bits',
fontFamily = '',
fontWeight = 600,
fontSize = 150,
letterSpacing = -0.05,
color = '#ffffff',
accentColor = '#ffffff',
reach = 200,
softness = 0.7,
dashLength = 4,
dashGap = 2,
strokeWidth = 1.5,
lineStyle = 'dashed',
reveal = 'letter',
specks = 15,
selection = true,
labels = true,
draggable = true,
sweep = true,
speed = 1,
className = '',
style
}) => {
const containerRef = useRef(null);
const canvasRef = useRef(null);
const settingsRef = useRef(null);
const wakeRef = useRef(() => {});
useEffect(() => {
settingsRef.current = {
text,
fontFamily,
fontWeight,
fontSize,
letterSpacing,
color,
accentColor,
reach,
softness,
dashLength,
dashGap,
strokeWidth,
lineStyle,
reveal,
specks,
selection,
labels,
draggable,
sweep,
speed
};
wakeRef.current();
});
useEffect(() => {
const container = containerRef.current;
const canvas = canvasRef.current;
const ctx = canvas?.getContext('2d');
const scratch = document.createElement('canvas');
const scratchCtx = scratch.getContext('2d');
if (!container || !canvas || !ctx || !scratchCtx) return undefined;
const reducedMotion = window.matchMedia?.('(prefers-reduced-motion: reduce)').matches;
let width = 1;
let height = 1;
let dpr = 1;
let raf = 0;
let last = performance.now();
let visible = true;
let alive = true;
let layoutKey = '';
let requestedFont = '';
let word = null;
let glyphs = [];
let presence = 0;
let clock = 0;
let pulse = 0;
let placed = false;
let dragging = -1;
const pointer = { x: 0, y: 0, inside: false };
const grab = { x: 0, y: 0 };
const lens = { x: 0, y: 0 };
const frame = { x1: 0, y1: 0, x2: 0, y2: 0, alpha: 0, index: -1 };
const refreshFonts = () => {
layoutKey = '';
wakeRef.current();
};
const family = s => s.fontFamily || getComputedStyle(container).fontFamily || 'sans-serif';
const fontFor = (s, size) => `${s.fontWeight} ${size}px ${family(s)}`;
const setFont = (target, s, size) => {
target.font = fontFor(s, size);
if ('letterSpacing' in target) target.letterSpacing = `${s.letterSpacing * size}px`;
target.textAlign = 'left';
target.textBaseline = 'alphabetic';
};
const sprite = (s, view, glyph, stroke) => {
const pad = Math.ceil(s.strokeWidth * 2 + 4);
const left = glyph.box.x1 - pad;
const top = glyph.box.y1 - pad;
const w = glyph.box.x2 - glyph.box.x1 + pad * 2;
const h = glyph.box.y2 - glyph.box.y1 + pad * 2;
const image = document.createElement('canvas');
image.width = Math.max(1, Math.ceil(w * dpr));
image.height = Math.max(1, Math.ceil(h * dpr));
const c = image.getContext('2d');
if (!c) return { image, left, top };
c.setTransform(dpr, 0, 0, dpr, -left * dpr, -top * dpr);
setFont(c, s, view.size);
if (stroke) {
c.lineJoin = 'round';
c.lineWidth = s.strokeWidth * 2;
c.lineCap = 'butt';
c.strokeStyle = s.color;
if (s.lineStyle !== 'solid') c.setLineDash([Math.max(1, s.dashLength), Math.max(1, s.dashGap)]);
c.strokeText(glyph.char, glyph.x, view.baseline);
c.setLineDash([]);
c.globalCompositeOperation = 'destination-out';
c.fillStyle = '#000000';
c.fillText(glyph.char, glyph.x, view.baseline);
c.globalCompositeOperation = 'source-over';
} else {
c.fillStyle = s.color;
c.fillText(glyph.char, glyph.x, view.baseline);
}
return { image, left, top };
};
const ensureLayout = s => {
const key = [
s.text,
family(s),
s.fontWeight,
s.fontSize,
s.letterSpacing,
s.color,
s.dashLength,
s.dashGap,
s.strokeWidth,
s.lineStyle,
width,
height,
dpr
].join('|');
if (key === layoutKey && word) return word;
layoutKey = key;
const wanted = fontFor(s, 64);
if (document.fonts && wanted !== requestedFont) {
requestedFont = wanted;
document.fonts.load(wanted, s.text).then(refreshFonts, refreshFonts);
}
const probe = scratchCtx;
setFont(probe, s, s.fontSize);
let m = probe.measureText(s.text);
const fit = Math.min(
1,
(width * 0.9) / Math.max(m.actualBoundingBoxLeft + m.actualBoundingBoxRight, 1),
(height * 0.66) / Math.max(m.actualBoundingBoxAscent + m.actualBoundingBoxDescent, 1)
);
const size = s.fontSize * fit;
setFont(probe, s, size);
m = probe.measureText(s.text);
const inkWidth = m.actualBoundingBoxLeft + m.actualBoundingBoxRight;
const inkHeight = m.actualBoundingBoxAscent + m.actualBoundingBoxDescent;
const x = (width - inkWidth) / 2 + m.actualBoundingBoxLeft;
const baseline = (height - inkHeight) / 2 + m.actualBoundingBoxAscent;
const next = {
size,
baseline,
left: x - m.actualBoundingBoxLeft,
right: x + m.actualBoundingBoxRight,
top: baseline - m.actualBoundingBoxAscent,
bottom: baseline + m.actualBoundingBoxDescent
};
word = next;
const chars = Array.from(s.text);
const previous = glyphs;
glyphs = [];
let prefix = '';
chars.forEach((char, i) => {
prefix += char;
const own = probe.measureText(char);
const gx = x + probe.measureText(prefix).width - own.width;
if (!char.trim()) return;
const base = {
char,
x: gx,
box: {
x1: gx - own.actualBoundingBoxLeft,
y1: baseline - own.actualBoundingBoxAscent,
x2: gx + own.actualBoundingBoxRight,
y2: baseline + own.actualBoundingBoxDescent
}
};
const kept = previous[glyphs.length];
glyphs.push({
...base,
offset: kept?.char === char ? kept.offset : { x: 0, y: 0 },
velocity: { x: 0, y: 0 },
outline: 0,
index: i,
fill: sprite(s, next, base, false),
dashes: sprite(s, next, base, true)
});
});
dragging = -1;
frame.index = -1;
return next;
};
const glyphAt = (x, y) => {
if (!word || y < word.top - 24 || y > word.bottom + 24) return -1;
let best = -1;
let bestDistance = Infinity;
glyphs.forEach((glyph, i) => {
const x1 = glyph.box.x1 + glyph.offset.x;
const x2 = glyph.box.x2 + glyph.offset.x;
const d = x < x1 ? x1 - x : x > x2 ? x - x2 : 0;
if (d < bestDistance) {
bestDistance = d;
best = i;
}
});
return bestDistance < 28 ? best : -1;
};
const falloff = (target, cx, cy, radius, strength, softness) => {
const inner = Math.min(1, Math.max(0, 1 - softness));
const gradient = target.createRadialGradient(cx, cy, 0, cx, cy, radius);
gradient.addColorStop(0, `rgba(0, 0, 0, ${strength})`);
if (inner > 0.995) {
gradient.addColorStop(0.995, `rgba(0, 0, 0, ${strength})`);
gradient.addColorStop(1, 'rgba(0, 0, 0, 0)');
return gradient;
}
for (let i = 0; i <= FALLOFF_STEPS; i++) {
const t = i / FALLOFF_STEPS;
const eased = t * t * (3 - 2 * t);
gradient.addColorStop(inner + (1 - inner) * t, `rgba(0, 0, 0, ${strength * (1 - eased)})`);
}
return gradient;
};
const blit = (target, art, dx, dy, originX, originY) => {
target.drawImage(
art.image,
Math.round((art.left + dx) * dpr - originX),
Math.round((art.top + dy) * dpr - originY)
);
};
const drawReveal = s => {
const radius = s.reach * dpr;
const cx = lens.x * dpr;
const cy = lens.y * dpr;
ctx.globalCompositeOperation = 'destination-out';
ctx.fillStyle = falloff(ctx, cx, cy, radius, presence, s.softness);
ctx.fillRect(cx - radius, cy - radius, radius * 2, radius * 2);
ctx.globalCompositeOperation = 'source-over';
const x0 = Math.max(0, Math.floor(cx - radius));
const y0 = Math.max(0, Math.floor(cy - radius));
const x1 = Math.min(canvas.width, Math.ceil(cx + radius));
const y1 = Math.min(canvas.height, Math.ceil(cy + radius));
if (x1 <= x0 || y1 <= y0) return;
const w = x1 - x0;
const h = y1 - y0;
if (scratch.width < w || scratch.height < h) {
scratch.width = Math.max(scratch.width, w);
scratch.height = Math.max(scratch.height, h);
}
scratchCtx.setTransform(1, 0, 0, 1, 0, 0);
scratchCtx.globalCompositeOperation = 'source-over';
scratchCtx.clearRect(0, 0, w, h);
for (const glyph of glyphs) blit(scratchCtx, glyph.dashes, glyph.offset.x, glyph.offset.y, x0, y0);
scratchCtx.globalCompositeOperation = 'destination-in';
scratchCtx.fillStyle = falloff(scratchCtx, cx - x0, cy - y0, radius, 1, s.softness);
scratchCtx.fillRect(0, 0, w, h);
scratchCtx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = presence;
ctx.drawImage(scratch, 0, 0, w, h, x0, y0, w, h);
ctx.globalAlpha = 1;
};
const crisp = value => (Math.round(value * dpr) + 0.5) / dpr;
const perimeterPoint = (distance, w, h) => {
let d = ((distance % (2 * (w + h))) + 2 * (w + h)) % (2 * (w + h));
if (d < w) return [frame.x1 + d, frame.y1, 0, -1];
d -= w;
if (d < h) return [frame.x2, frame.y1 + d, 1, 0];
d -= h;
if (d < w) return [frame.x2 - d, frame.y2, 0, 1];
d -= w;
return [frame.x1, frame.y2 - d, -1, 0];
};
const drawSpecks = (s, a) => {
const w = frame.x2 - frame.x1;
const h = frame.y2 - frame.y1;
if (w < 2 || h < 2) return;
const perimeter = 2 * (w + h);
const seed = frame.index + 1;
const grid = 3;
for (let k = 0; k < s.specks; k++) {
const period = 0.5 + noise(seed, k, 11) * 1.2;
const t = pulse / period + noise(seed, k, 17);
const cycle = Math.floor(t);
const life = t - cycle;
if (life > 0.7) continue;
const [px, py, nx, ny] = perimeterPoint(noise(seed, k, cycle) * perimeter, w, h);
const pick = noise(seed, k, cycle, 2);
const size = pick < 0.46 ? 2 : pick < 0.7 ? 3 : pick < 0.84 ? 5 : pick < 0.94 ? 8 : 11;
const large = size >= 8;
const out = (large ? 9 : 4) + Math.floor(noise(seed, k, cycle, 1) * 5) * grid;
const x = frame.x1 + Math.round((px + nx * out - frame.x1) / grid) * grid;
const y = frame.y1 + Math.round((py + ny * out - frame.y1) / grid) * grid;
const tone = noise(seed, k, cycle, 3);
const blink = life < 0.06 || (life > 0.32 && life < 0.36) ? 0.35 : 1;
const alpha = a * (large ? 0.3 + 0.4 * tone : 0.3 + 0.6 * tone) * blink;
const left = Math.round(x - size / 2);
const top = Math.round(y - size / 2);
if (tone < 0.26 || (large && tone < 0.78)) {
ctx.strokeStyle = rgba(s.accentColor, alpha);
ctx.strokeRect(left + 0.5, top + 0.5, size, size);
if (large && tone > 0.5) {
ctx.fillStyle = rgba(s.accentColor, alpha);
ctx.fillRect(Math.round(x) - 1, Math.round(y) - 1, 2, 2);
}
} else {
ctx.fillStyle = rgba(s.accentColor, alpha);
ctx.fillRect(left, top, size, size);
}
}
for (let j = 0; j < 2; j++) {
const head = (pulse * 0.42 * s.speed + j * 0.5) * perimeter;
for (let i = 0; i < 4; i++) {
const [x, y] = perimeterPoint(head - i * 6, w, h);
const size = i === 0 ? 3 : 2;
ctx.fillStyle = rgba(s.accentColor, a * [0.95, 0.55, 0.32, 0.16][i]);
ctx.fillRect(Math.round(x - size / 2), Math.round(y - size / 2), size, size);
}
}
};
const drawFrame = s => {
const glyph = glyphs[frame.index];
if (!glyph || frame.alpha < 0.01) return;
const a = frame.alpha;
const x1 = crisp(frame.x1);
const y1 = crisp(frame.y1);
const x2 = crisp(frame.x2);
const y2 = crisp(frame.y2);
ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
const moved = Math.hypot(glyph.offset.x, glyph.offset.y);
if (moved > 1) {
const hx = (glyph.box.x1 + glyph.box.x2) / 2;
const hy = (glyph.box.y1 + glyph.box.y2) / 2;
ctx.beginPath();
ctx.moveTo(hx, hy);
ctx.lineTo(hx + glyph.offset.x, hy + glyph.offset.y);
ctx.setLineDash([3, 4]);
ctx.lineWidth = 1;
ctx.strokeStyle = rgba(s.accentColor, 0.45 * a);
ctx.stroke();
ctx.setLineDash([]);
ctx.beginPath();
ctx.rect(Math.round(hx) - 2, Math.round(hy) - 2, 4, 4);
ctx.fillStyle = rgba(s.accentColor, 0.7 * a);
ctx.fill();
}
ctx.beginPath();
ctx.rect(x1, y1, x2 - x1, y2 - y1);
ctx.lineWidth = 1;
ctx.strokeStyle = rgba(s.accentColor, 0.5 * a);
ctx.stroke();
ctx.beginPath();
for (const [cx, cy] of [
[x1, y1],
[x2, y1],
[x2, y2],
[x1, y2]
]) {
ctx.rect(Math.round(cx) - 2, Math.round(cy) - 2, 5, 5);
}
ctx.fillStyle = rgba(s.accentColor, 0.95 * a);
ctx.fill();
if (s.specks > 0) {
ctx.lineWidth = 1;
drawSpecks(s, a);
}
if (!s.labels) return;
ctx.font = LABEL_FONT;
ctx.textAlign = 'left';
ctx.textBaseline = 'bottom';
ctx.fillStyle = rgba(s.accentColor, 0.62 * a);
const label =
moved > 1
? `${signed(Math.round(glyph.offset.x))}, ${signed(Math.round(-glyph.offset.y))}`
: `${glyph.char} ${Math.round(glyph.box.x2 - glyph.box.x1)} × ${Math.round(glyph.box.y2 - glyph.box.y1)}`;
ctx.fillText(label, Math.round(frame.x1), Math.round(frame.y1) - 7);
};
const tick = now => {
raf = 0;
const s = settingsRef.current;
if (!s) return;
const dt = Math.min(0.05, Math.max(0.001, (now - last) / 1000));
last = now;
const view = ensureLayout(s);
const sweeping = s.sweep && !reducedMotion && !pointer.inside && dragging < 0;
if (sweeping) clock += dt * s.speed;
pulse += dt;
let targetX = pointer.x;
let targetY = pointer.y;
if (sweeping) {
targetX = view.left + (view.right - view.left) * (0.5 - 0.5 * Math.cos(clock * 0.45));
targetY = view.top + (view.bottom - view.top) * (0.45 + 0.1 * Math.sin(clock * 0.8));
}
const active = pointer.inside || sweeping || dragging >= 0;
if (active && !placed) {
lens.x = targetX;
lens.y = targetY;
}
if (active) {
const lag = pointer.inside ? 0.05 : 0.22;
lens.x = approach(lens.x, targetX, dt, lag);
lens.y = approach(lens.y, targetY, dt, lag);
}
placed = active;
presence = approach(presence, s.reveal === 'area' && active && dragging < 0 ? 1 : 0, dt, 0.16);
let moving = false;
glyphs.forEach((glyph, i) => {
if (i === dragging) {
glyph.offset.x = approach(glyph.offset.x, pointer.x - grab.x, dt, 0.03);
glyph.offset.y = approach(glyph.offset.y, pointer.y - grab.y, dt, 0.03);
glyph.velocity.x = 0;
glyph.velocity.y = 0;
moving = true;
return;
}
const { offset, velocity } = glyph;
if (Math.abs(offset.x) < 0.05 && Math.abs(offset.y) < 0.05 && Math.hypot(velocity.x, velocity.y) < 0.5) {
offset.x = 0;
offset.y = 0;
velocity.x = 0;
velocity.y = 0;
return;
}
velocity.x += (-SPRING * offset.x - DAMPING * velocity.x) * dt;
velocity.y += (-SPRING * offset.y - DAMPING * velocity.y) * dt;
offset.x += velocity.x * dt;
offset.y += velocity.y * dt;
moving = true;
});
const focus = dragging >= 0 ? dragging : active ? glyphAt(lens.x, lens.y) : -1;
if (focus >= 0 && s.selection) {
const glyph = glyphs[focus];
const bx1 = glyph.box.x1 + glyph.offset.x - 6;
const by1 = glyph.box.y1 + glyph.offset.y - 6;
const bx2 = glyph.box.x2 + glyph.offset.x + 6;
const by2 = glyph.box.y2 + glyph.offset.y + 6;
if (frame.index < 0 || frame.alpha < 0.02) {
frame.x1 = bx1;
frame.y1 = by1;
frame.x2 = bx2;
frame.y2 = by2;
}
const glide = focus === dragging ? 0.02 : 0.08;
frame.x1 = approach(frame.x1, bx1, dt, glide);
frame.y1 = approach(frame.y1, by1, dt, glide);
frame.x2 = approach(frame.x2, bx2, dt, glide);
frame.y2 = approach(frame.y2, by2, dt, glide);
frame.index = focus;
}
frame.alpha = approach(frame.alpha, focus >= 0 && s.selection ? 1 : 0, dt, 0.1);
glyphs.forEach((glyph, i) => {
const target = s.reveal === 'letter' && i === focus && i !== dragging ? 1 : 0;
glyph.outline = approach(glyph.outline, target, dt, 0.09);
if (Math.abs(glyph.outline - target) > 0.002) moving = true;
else glyph.outline = target;
});
if (s.draggable) container.style.cursor = dragging >= 0 ? 'grabbing' : focus >= 0 && pointer.inside ? 'grab' : '';
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.globalCompositeOperation = 'source-over';
ctx.clearRect(0, 0, canvas.width, canvas.height);
for (const glyph of glyphs) {
const moved = Math.hypot(glyph.offset.x, glyph.offset.y);
if (moved > 1) {
ctx.globalAlpha = Math.min(1, moved / 24) * 0.55;
blit(ctx, glyph.dashes, 0, 0, 0, 0);
ctx.globalAlpha = 1;
}
}
for (const glyph of glyphs) {
if (glyph.outline < 0.999) {
ctx.globalAlpha = 1 - glyph.outline;
blit(ctx, glyph.fill, glyph.offset.x, glyph.offset.y, 0, 0);
}
if (glyph.outline > 0.001) {
ctx.globalAlpha = glyph.outline;
blit(ctx, glyph.dashes, glyph.offset.x, glyph.offset.y, 0, 0);
}
ctx.globalAlpha = 1;
}
if (presence > 0.001) drawReveal(s);
drawFrame(s);
const settling =
moving ||
Math.abs(presence - (s.reveal === 'area' && active && dragging < 0 ? 1 : 0)) > 0.002 ||
(frame.alpha > 0.01 && frame.alpha < 0.99);
if ((active || settling) && visible && alive) raf = requestAnimationFrame(tick);
};
const wake = () => {
if (raf || !visible || !alive) return;
last = performance.now();
raf = requestAnimationFrame(tick);
};
wakeRef.current = wake;
const resize = () => {
width = Math.max(1, container.clientWidth);
height = Math.max(1, container.clientHeight);
dpr = Math.min(window.devicePixelRatio || 1, 2);
canvas.width = Math.round(width * dpr);
canvas.height = Math.round(height * dpr);
layoutKey = '';
wake();
};
const locate = e => {
const rect = container.getBoundingClientRect();
pointer.x = e.clientX - rect.left;
pointer.y = e.clientY - rect.top;
};
const onMove = e => {
locate(e);
pointer.inside = true;
wake();
};
const onLeave = () => {
if (dragging >= 0) return;
pointer.inside = false;
wake();
};
const onDown = e => {
locate(e);
pointer.inside = true;
const s = settingsRef.current;
if (s?.draggable && (e.pointerType !== 'mouse' || e.button === 0)) {
const index = glyphAt(pointer.x, pointer.y);
if (index >= 0) {
dragging = index;
grab.x = pointer.x - glyphs[index].offset.x;
grab.y = pointer.y - glyphs[index].offset.y;
container.setPointerCapture?.(e.pointerId);
}
}
wake();
};
const onUp = e => {
if (dragging >= 0) {
dragging = -1;
container.releasePointerCapture?.(e.pointerId);
const rect = container.getBoundingClientRect();
pointer.inside =
e.clientX >= rect.left && e.clientX <= rect.right && e.clientY >= rect.top && e.clientY <= rect.bottom;
}
wake();
};
container.addEventListener('pointermove', onMove, { passive: true });
container.addEventListener('pointerenter', onMove, { passive: true });
container.addEventListener('pointerdown', onDown, { passive: true });
container.addEventListener('pointerup', onUp, { passive: true });
container.addEventListener('pointercancel', onUp, { passive: true });
container.addEventListener('pointerleave', onLeave, { passive: true });
const resizeObserver = new ResizeObserver(resize);
resizeObserver.observe(container);
const intersectionObserver = new IntersectionObserver(([entry]) => {
visible = entry.isIntersecting;
wake();
});
intersectionObserver.observe(container);
if (document.fonts) document.fonts.ready.then(refreshFonts, refreshFonts);
resize();
return () => {
alive = false;
cancelAnimationFrame(raf);
wakeRef.current = () => {};
resizeObserver.disconnect();
intersectionObserver.disconnect();
container.removeEventListener('pointermove', onMove);
container.removeEventListener('pointerenter', onMove);
container.removeEventListener('pointerdown', onDown);
container.removeEventListener('pointerup', onUp);
container.removeEventListener('pointercancel', onUp);
container.removeEventListener('pointerleave', onLeave);
};
}, []);
return (
<div ref={containerRef} className={`tech-text ${className}`.trim()} style={style} role="img" aria-label={text}>
<canvas ref={canvasRef} className="tech-text-canvas" />
</div>
);
};
export default TechText;
```
### Component CSS
```css
.tech-text {
position: relative;
width: 100%;
height: 100%;
touch-action: pan-y;
user-select: none;
}
.tech-text-canvas {
display: block;
width: 100%;
height: 100%;
}
```
### Integration Instructions
1. Install any listed dependencies.
2. Copy the component source into the appropriate directory in the project.
3. Import the CSS file alongside the component.
4. Import and render the component using the usage example above as a starting point.
5. Adjust props as needed for the specific use case — refer to the props table for all available options.
### More from React Bits
The full library index, including everything reactbits.dev offers, is at https://reactbits.dev/llms.txt — fetch it if this component is not the right fit or the project needs more pieces.