57 lines
1.5 KiB
TypeScript
57 lines
1.5 KiB
TypeScript
import { useRouter } from "next/router";
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import Link, { LinkProps } from "next/link";
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import React, { useState, useEffect, ReactElement, Children } from "react";
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type ActiveLinkProps = LinkProps & {
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children: ReactElement;
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activeClassName: string;
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};
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const ActiveLink = ({
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children,
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activeClassName,
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...props
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}: ActiveLinkProps) => {
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const { asPath, isReady, pathname } = useRouter();
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const child = Children.only(children);
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const childClassName = child.props.className || "";
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const [className, setClassName] = useState(childClassName);
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useEffect(() => {
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// Check if the router fields are updated client-side
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if (isReady) {
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// Dynamic route will be matched via props.as
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// Static route will be matched via props.href
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const linkPathname = new URL(
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(props.as || props.href) as string,
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location.href
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).pathname;
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// Using URL().pathname to get rid of query and hash
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const activePathname = new URL(asPath, location.href).pathname;
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const newClassName =
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linkPathname === activePathname
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? `${childClassName} ${activeClassName}`.trim()
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: childClassName;
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if (newClassName !== className) {
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setClassName(newClassName);
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}
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}
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}, [
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asPath,
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isReady,
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props.as,
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props.href,
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childClassName,
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activeClassName,
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setClassName,
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className,
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]);
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return (
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<Link {...props}>
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<a>
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{React.cloneElement(child, {
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className: className || null,
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})}
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</a>
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</Link>
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);
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};
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export default ActiveLink;
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