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| 1 | +import "./ElectricBorder.css"; |
| 2 | + |
| 3 | +import { |
| 4 | + CSSProperties, |
| 5 | + PropsWithChildren, |
| 6 | + useCallback, |
| 7 | + useEffect, |
| 8 | + useId, |
| 9 | + useLayoutEffect, |
| 10 | + useRef, |
| 11 | +} from "react"; |
| 12 | + |
| 13 | +type ElectricBorderProps = PropsWithChildren<{ |
| 14 | + color?: string; |
| 15 | + speed?: number; |
| 16 | + chaos?: number; |
| 17 | + thickness?: number; |
| 18 | + className?: string; |
| 19 | + style?: CSSProperties; |
| 20 | +}>; |
| 21 | + |
| 22 | +const ElectricBorder: React.FC<ElectricBorderProps> = ({ |
| 23 | + children, |
| 24 | + color = "#5227FF", |
| 25 | + speed = 1, |
| 26 | + chaos = 1, |
| 27 | + thickness = 2, |
| 28 | + className, |
| 29 | + style, |
| 30 | +}: ElectricBorderProps) => { |
| 31 | + const rawId = useId().replace(/[:]/g, ""); |
| 32 | + const filterId = `turbulent-displace-${rawId}`; |
| 33 | + const svgRef = useRef<SVGSVGElement | null>(null); |
| 34 | + const rootRef = useRef<HTMLDivElement | null>(null); |
| 35 | + const strokeRef = useRef<HTMLDivElement | null>(null); |
| 36 | + |
| 37 | + const updateAnim = useCallback(() => { |
| 38 | + const svg = svgRef.current; |
| 39 | + const host = rootRef.current; |
| 40 | + if (!svg || !host) return; |
| 41 | + |
| 42 | + if (strokeRef.current) { |
| 43 | + strokeRef.current.style.filter = `url(#${filterId})`; |
| 44 | + } |
| 45 | + |
| 46 | + const width = Math.max( |
| 47 | + 1, |
| 48 | + Math.round(host.clientWidth || host.getBoundingClientRect().width || 0) |
| 49 | + ); |
| 50 | + const height = Math.max( |
| 51 | + 1, |
| 52 | + Math.round(host.clientHeight || host.getBoundingClientRect().height || 0) |
| 53 | + ); |
| 54 | + |
| 55 | + const dyAnims = Array.from( |
| 56 | + svg.querySelectorAll<SVGAnimateElement>( |
| 57 | + 'feOffset > animate[attributeName="dy"]' |
| 58 | + ) |
| 59 | + ); |
| 60 | + if (dyAnims.length >= 2) { |
| 61 | + dyAnims[0].setAttribute("values", `${height}; 0`); |
| 62 | + dyAnims[1].setAttribute("values", `0; -${height}`); |
| 63 | + } |
| 64 | + |
| 65 | + const dxAnims = Array.from( |
| 66 | + svg.querySelectorAll<SVGAnimateElement>( |
| 67 | + 'feOffset > animate[attributeName="dx"]' |
| 68 | + ) |
| 69 | + ); |
| 70 | + if (dxAnims.length >= 2) { |
| 71 | + dxAnims[0].setAttribute("values", `${width}; 0`); |
| 72 | + dxAnims[1].setAttribute("values", `0; -${width}`); |
| 73 | + } |
| 74 | + |
| 75 | + const baseDur = 6; |
| 76 | + const dur = Math.max(0.001, baseDur / (speed || 1)); |
| 77 | + [...dyAnims, ...dxAnims].forEach(a => a.setAttribute("dur", `${dur}s`)); |
| 78 | + |
| 79 | + const disp = svg.querySelector("feDisplacementMap"); |
| 80 | + if (disp) disp.setAttribute("scale", String(30 * (chaos || 1))); |
| 81 | + |
| 82 | + const filterEl = svg.querySelector<SVGFilterElement>( |
| 83 | + "#" + CSS.escape(filterId) |
| 84 | + ); |
| 85 | + if (filterEl) { |
| 86 | + filterEl.setAttribute("x", "-200%"); |
| 87 | + filterEl.setAttribute("y", "-200%"); |
| 88 | + filterEl.setAttribute("width", "500%"); |
| 89 | + filterEl.setAttribute("height", "500%"); |
| 90 | + } |
| 91 | + |
| 92 | + requestAnimationFrame(() => { |
| 93 | + [...dyAnims, ...dxAnims].forEach((a: SVGAnimateElement) => { |
| 94 | + const anim = a as unknown as { beginElement?: () => void }; |
| 95 | + if (typeof anim.beginElement === "function") { |
| 96 | + try { |
| 97 | + anim.beginElement(); |
| 98 | + } catch { |
| 99 | + // ignore |
| 100 | + } |
| 101 | + } |
| 102 | + }); |
| 103 | + }); |
| 104 | + }, [chaos, filterId, speed]); |
| 105 | + |
| 106 | + useEffect(() => { |
| 107 | + updateAnim(); |
| 108 | + }, [updateAnim]); |
| 109 | + |
| 110 | + useLayoutEffect(() => { |
| 111 | + if (!rootRef.current) return; |
| 112 | + const ro = new ResizeObserver(() => updateAnim()); |
| 113 | + ro.observe(rootRef.current); |
| 114 | + updateAnim(); |
| 115 | + return () => ro.disconnect(); |
| 116 | + }, [updateAnim]); |
| 117 | + |
| 118 | + const vars = { |
| 119 | + "--electric-border-color": color, |
| 120 | + "--eb-border-width": `${thickness}px`, |
| 121 | + } as CSSProperties; |
| 122 | + |
| 123 | + return ( |
| 124 | + <div |
| 125 | + ref={rootRef} |
| 126 | + className={`electric-border ${className ?? ""}`} |
| 127 | + style={{ ...vars, ...style }} |
| 128 | + > |
| 129 | + <svg ref={svgRef} className="eb-svg" aria-hidden focusable="false"> |
| 130 | + <defs> |
| 131 | + <filter |
| 132 | + id={filterId} |
| 133 | + colorInterpolationFilters="sRGB" |
| 134 | + x="-20%" |
| 135 | + y="-20%" |
| 136 | + width="140%" |
| 137 | + height="140%" |
| 138 | + > |
| 139 | + <feTurbulence |
| 140 | + type="turbulence" |
| 141 | + baseFrequency="0.02" |
| 142 | + numOctaves="10" |
| 143 | + result="noise1" |
| 144 | + seed="1" |
| 145 | + /> |
| 146 | + <feOffset in="noise1" dx="0" dy="0" result="offsetNoise1"> |
| 147 | + <animate |
| 148 | + attributeName="dy" |
| 149 | + values="700; 0" |
| 150 | + dur="6s" |
| 151 | + repeatCount="indefinite" |
| 152 | + calcMode="linear" |
| 153 | + /> |
| 154 | + </feOffset> |
| 155 | + |
| 156 | + <feTurbulence |
| 157 | + type="turbulence" |
| 158 | + baseFrequency="0.02" |
| 159 | + numOctaves="10" |
| 160 | + result="noise2" |
| 161 | + seed="1" |
| 162 | + /> |
| 163 | + <feOffset in="noise2" dx="0" dy="0" result="offsetNoise2"> |
| 164 | + <animate |
| 165 | + attributeName="dy" |
| 166 | + values="0; -700" |
| 167 | + dur="6s" |
| 168 | + repeatCount="indefinite" |
| 169 | + calcMode="linear" |
| 170 | + /> |
| 171 | + </feOffset> |
| 172 | + |
| 173 | + <feTurbulence |
| 174 | + type="turbulence" |
| 175 | + baseFrequency="0.02" |
| 176 | + numOctaves="10" |
| 177 | + result="noise1" |
| 178 | + seed="2" |
| 179 | + /> |
| 180 | + <feOffset in="noise1" dx="0" dy="0" result="offsetNoise3"> |
| 181 | + <animate |
| 182 | + attributeName="dx" |
| 183 | + values="490; 0" |
| 184 | + dur="6s" |
| 185 | + repeatCount="indefinite" |
| 186 | + calcMode="linear" |
| 187 | + /> |
| 188 | + </feOffset> |
| 189 | + |
| 190 | + <feTurbulence |
| 191 | + type="turbulence" |
| 192 | + baseFrequency="0.02" |
| 193 | + numOctaves="10" |
| 194 | + result="noise2" |
| 195 | + seed="2" |
| 196 | + /> |
| 197 | + <feOffset in="noise2" dx="0" dy="0" result="offsetNoise4"> |
| 198 | + <animate |
| 199 | + attributeName="dx" |
| 200 | + values="0; -490" |
| 201 | + dur="6s" |
| 202 | + repeatCount="indefinite" |
| 203 | + calcMode="linear" |
| 204 | + /> |
| 205 | + </feOffset> |
| 206 | + |
| 207 | + <feComposite in="offsetNoise1" in2="offsetNoise2" result="part1" /> |
| 208 | + <feComposite in="offsetNoise3" in2="offsetNoise4" result="part2" /> |
| 209 | + <feBlend |
| 210 | + in="part1" |
| 211 | + in2="part2" |
| 212 | + mode="color-dodge" |
| 213 | + result="combinedNoise" |
| 214 | + /> |
| 215 | + <feDisplacementMap |
| 216 | + in="SourceGraphic" |
| 217 | + in2="combinedNoise" |
| 218 | + scale="30" |
| 219 | + xChannelSelector="R" |
| 220 | + yChannelSelector="B" |
| 221 | + /> |
| 222 | + </filter> |
| 223 | + </defs> |
| 224 | + </svg> |
| 225 | + |
| 226 | + <div className="eb-layers"> |
| 227 | + <div ref={strokeRef} className="eb-stroke" /> |
| 228 | + <div className="eb-glow-1" /> |
| 229 | + <div className="eb-glow-2" /> |
| 230 | + <div className="eb-background-glow" /> |
| 231 | + </div> |
| 232 | + |
| 233 | + <div className="eb-content">{children}</div> |
| 234 | + </div> |
| 235 | + ); |
| 236 | +}; |
| 237 | + |
| 238 | +export default ElectricBorder; |
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