vercel-labs__json-render/examples/dashboard/components/code-highlight.tsx

"use client";

import { useEffect, useState } from "react";
import { codeToHtml } from "shiki";

const vercelDarkTheme = {
  name: "vercel-dark",
  type: "dark" as const,
  colors: {
    "editor.background": "transparent",
    "editor.foreground": "#EDEDED",
  },
  settings: [
    {
      scope: ["comment", "punctuation.definition.comment"],
      settings: { foreground: "#666666" },
    },
    {
      scope: ["string", "string.quoted", "string.template"],
      settings: { foreground: "#50E3C2" },
    },
    {
      scope: [
        "constant.numeric",
        "constant.language.boolean",
        "constant.language.null",
      ],
      settings: { foreground: "#50E3C2" },
    },
    {
      scope: ["keyword", "storage.type", "storage.modifier"],
      settings: { foreground: "#FF0080" },
    },
    {
      scope: ["keyword.operator", "keyword.control"],
      settings: { foreground: "#FF0080" },
    },
    {
      scope: ["entity.name.function", "support.function", "meta.function-call"],
      settings: { foreground: "#7928CA" },
    },
    {
      scope: ["variable", "variable.other", "variable.parameter"],
      settings: { foreground: "#EDEDED" },
    },
    {
      scope: ["entity.name.tag", "support.class.component", "entity.name.type"],
      settings: { foreground: "#FF0080" },
    },
    {
      scope: ["punctuation", "meta.brace", "meta.bracket"],
      settings: { foreground: "#888888" },
    },
    {
      scope: [
        "support.type.property-name",
        "entity.name.tag.json",
        "meta.object-literal.key",
      ],
      settings: { foreground: "#EDEDED" },
    },
    {
      scope: ["entity.other.attribute-name"],
      settings: { foreground: "#50E3C2" },
    },
    {
      scope: ["support.type.primitive", "entity.name.type.primitive"],
      settings: { foreground: "#50E3C2" },
    },
  ],
};

const vercelLightTheme = {
  name: "vercel-light",
  type: "light" as const,
  colors: {
    "editor.background": "transparent",
    "editor.foreground": "#171717",
  },
  settings: [
    {
      scope: ["comment", "punctuation.definition.comment"],
      settings: { foreground: "#6b7280" },
    },
    {
      scope: ["string", "string.quoted", "string.template"],
      settings: { foreground: "#067a6e" },
    },
    {
      scope: [
        "constant.numeric",
        "constant.language.boolean",
        "constant.language.null",
      ],
      settings: { foreground: "#067a6e" },
    },
    {
      scope: ["keyword", "storage.type", "storage.modifier"],
      settings: { foreground: "#d6409f" },
    },
    {
      scope: ["keyword.operator", "keyword.control"],
      settings: { foreground: "#d6409f" },
    },
    {
      scope: ["entity.name.function", "support.function", "meta.function-call"],
      settings: { foreground: "#6e56cf" },
    },
    {
      scope: ["variable", "variable.other", "variable.parameter"],
      settings: { foreground: "#171717" },
    },
    {
      scope: ["entity.name.tag", "support.class.component", "entity.name.type"],
      settings: { foreground: "#d6409f" },
    },
    {
      scope: ["punctuation", "meta.brace", "meta.bracket"],
      settings: { foreground: "#6b7280" },
    },
    {
      scope: [
        "support.type.property-name",
        "entity.name.tag.json",
        "meta.object-literal.key",
      ],
      settings: { foreground: "#171717" },
    },
    {
      scope: ["entity.other.attribute-name"],
      settings: { foreground: "#067a6e" },
    },
    {
      scope: ["support.type.primitive", "entity.name.type.primitive"],
      settings: { foreground: "#067a6e" },
    },
  ],
};

interface CodeHighlightProps {
  code: string;
  language?: string;
}

export function CodeHighlight({ code, language = "json" }: CodeHighlightProps) {
  const [html, setHtml] = useState<string>("");

  useEffect(() => {
    codeToHtml(code, {
      lang: language,
      themes: {
        light: vercelLightTheme,
        dark: vercelDarkTheme,
      },
      defaultColor: false,
    }).then(setHtml);
  }, [code, language]);

  if (!html) {
    return (
      <pre className="text-xs font-mono whitespace-pre-wrap break-all">
        {code}
      </pre>
    );
  }

  return (
    <div
      className="text-xs [&_pre]:!bg-transparent [&_pre]:!p-0 [&_code]:!bg-transparent [&_.shiki]:!bg-transparent"
      dangerouslySetInnerHTML={{ __html: html }}
    />
  );
}