123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128
/** * Render markup tag. * @param tagName (required) * @param attributes (optional) * @param children (optional) * @return rendered tag * * Examples: * * ```ts * import { tag } from "./mod.ts" * import { assertEquals } from "https://deno.land/std/testing/asserts.ts" * * // common usage * assertEquals( *   tag("div", { id: "foo", class: "bar" }, "Hello world!"), *   `<div id="foo" class="bar">Hello world!</div>`, * ); * * // void (no-close) tag * assertEquals( *   tag("meta", { charset: "utf-8" }), *   `<meta charset="utf-8">`, * ); * * // nested tags * assertEquals( *   tag( "ul", { class: "nav" }, tag("li", "first"), tag("li", "second")), *   `<ul class="nav"><li>first</li><li>second</li></ul>`, * ); * ``` */export function tag(  tagName: string,  attributesOrFirstChild?: Record<string, string | number> | string,  ...children: Array<string>): string {  if (!tagName) {    throw new Error("tagName is empty.");  }
  if (/\s/.test(tagName)) {    throw new Error("tagName has whitespace characters.");  }
  const isVoidTag = [    "area",    "base",    "br",    "col",    "embed",    "hr",    "img",    "input",    "link",    "meta",    "param",    "source",    "track",    "wbr",  ].includes(tagName);
  const attrs: Array<string> = [];  if (typeof attributesOrFirstChild === "string") {    children.unshift(attributesOrFirstChild);  } else if (attributesOrFirstChild != null) {    Object.entries(attributesOrFirstChild)      .forEach(([k, v]) => attrs.push(` ${k}="${v}"`));  }
  const close = isVoidTag ? "" : `${children.join("")}</${tagName}>`;
  return `<${tagName}${attrs.join("")}>${close}`;}
// character referencesexport const NBSP = "&nbsp;";export const LT = "&lt;";export const GT = "&gt;";export const AMP = "&amp;";export const QUOT = "&quot;";
/** * Sanitize '&', '<', '>' and '"' in string. * @param string (optional) * @param SanitizeOption (optional) * @return sanitized string * * Use SanitizeOption like `{ amp: false }` to ignore sanitizing. * * Examples: * * ```ts * import { sanitize } from "./mod.ts" * import { assertEquals } from "https://deno.land/std/testing/asserts.ts" * * // common usage * assertEquals( *   sanitize(`<img src="https://www.example.com?width=10&height=10">`), *   "&lt;img src=&quot;https://www.example.com?width=10&amp;height=10&quot;&gt;", * ); * * // ignore sanitizing specific characters * assertEquals( *   sanitize("<br>", { lt:false, gt:false }), *   "<br>", * ); * ``` */export function sanitize(  str = "",  { amp = true, lt = true, gt = true, quot = true } = {},): string {  if (amp) {    str = str.replaceAll("&", AMP);  }  if (lt) {    str = str.replaceAll("<", LT);  }  if (gt) {    str = str.replaceAll(">", GT);  }  if (quot) {    str = str.replaceAll(`"`, QUOT);  }  return str;}