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/*! * encodeurl * Copyright(c) 2016 Douglas Christopher Wilson * Copyright (c) 2020 Henry Zhuang * MIT Licensed */
/** * RegExp to match non-URL code points, *after* encoding (i.e. not including "%") * and including invalid escape sequences. * @private */
const ENCODE_CHARS_REGEXP =  /(?:[^\x21\x25\x26-\x3B\x3D\x3F-\x5B\x5D\x5F\x61-\x7A\x7E]|%(?:[^0-9A-Fa-f]|[0-9A-Fa-f][^0-9A-Fa-f]|$))+/g;
/** * RegExp to match unmatched surrogate pair. * @private */
const UNMATCHED_SURROGATE_PAIR_REGEXP =  /(^|[^\uD800-\uDBFF])[\uDC00-\uDFFF]|[\uD800-\uDBFF]([^\uDC00-\uDFFF]|$)/g;
/** * String to replace unmatched surrogate pair with. * @private */
const UNMATCHED_SURROGATE_PAIR_REPLACE = "$1\uFFFD$2";
/** * Encode a URL to a percent-encoded form, excluding already-encoded sequences. * * This function will take an already-encoded URL and encode all the non-URL * code points. This function will not encode the "%" character unless it is * not part of a valid sequence (`%20` will be left as-is, but `%foo` will * be encoded as `%25foo`). * * This encode is meant to be "safe" and does not throw errors. It will try as * hard as it can to properly encode the given URL, including replacing any raw, * unpaired surrogate pairs with the Unicode replacement character prior to * encoding. * * @param {string} url * @return {string} * @public */
export function encodeUrl(url: string): string {  return String(url)    .replace(UNMATCHED_SURROGATE_PAIR_REGEXP, UNMATCHED_SURROGATE_PAIR_REPLACE)    .replace(ENCODE_CHARS_REGEXP, encodeURI);}