41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
"use client";
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import type { AnchorHTMLAttributes } from "react";
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import { usePostLinkNewTab } from "@/components/PostLinkProvider";
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type MdLinkProps = AnchorHTMLAttributes<HTMLAnchorElement>;
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function isExternalHref(href?: string): boolean {
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if (!href) return false;
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if (href.startsWith("/") || href.startsWith("#") || href.startsWith("?")) {
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return false;
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}
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if (href.startsWith("mailto:") || href.startsWith("tel:")) return false;
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try {
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if (typeof window !== "undefined") {
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const url = new URL(href, window.location.origin);
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return url.origin !== window.location.origin;
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}
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} catch {
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/* 相对或非法 URL 当站内 */
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}
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return /^https?:\/\//i.test(href);
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}
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/** Markdown 链接：外链是否新开由站点设置 post_link_new_tab 控制 */
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export default function MdLink({ href, children, ...rest }: MdLinkProps) {
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const openInNewTab = usePostLinkNewTab();
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const external = isExternalHref(href);
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return (
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<a
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{...rest}
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href={href}
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{...(external && openInNewTab
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? { target: "_blank", rel: "noopener noreferrer" }
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: {})}
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>
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{children}
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</a>
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);
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}
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