class MyURLSearchParams {  #urlReg = /^(.*)\?/  #reg = /(\w=\w)/g  #urlSearch = []  #url  /**   * @params {string} init   */  constructor(init) {    if (init && this.#reg.test(init)) {      this.#url = init.match(this.#urlReg)?.shift();      this.#urlSearch = decodeURI(init)        .match(this.#reg)        .map(term => {          const [name, value] = term.split('=')          return { name, value }        })    }  }  /**    * @params {string} name   * @params {any} value   */  append(name, value) {    this.#urlSearch.push({ name, value: `${value}` })  }  /**   * @params {string} name   */  delete(name) {    this.#urlSearch = this.#urlSearch.filter(item => item.name !== name)  }  /**   * @returns {Iterator}    */  entries() {    return this.#urlSearch.map(({ name, value }) => [name, value])[Symbol.iterator]()  }  /**   * @param {(value, key) => void} callback   */  forEach(callback) {    this.#urlSearch.map(({ name, value }) => callback(value, name, this))  }  /**   * @param {string} name   * returns the first value of the name   */  get(name) {    return this.#urlSearch.find(item => item.name === name || this.#url + item.name === name)?.value || null  }  /**   * @param {string} name   * @return {string[]}   * returns the value list of the name   */  getAll(name) {    return this.#urlSearch      .filter(item => item.name === name)      .map(({ value }) => value)  }  /**   * @params {string} name   * @return {boolean}   */  has(name) {    return Boolean(this.#urlSearch.find(item => item.name === name))  }  /**   * @return {Iterator}   */  keys() {    return this.#urlSearch.map(({ name }) => name)  }  /**   * @param {string} name   * @param {any} value   */  set(name, value) {    const idx = this.#urlSearch.findIndex(item => item.name === name);    if (idx >= 0) {      this.#urlSearch[idx] = { name, value: `${value}` }      let lastIdx = this.#urlSearch.findLastIndex(item => item.name === name);      while (lastIdx > idx) {        this.#urlSearch.splice(lastIdx, 1)        lastIdx = this.#urlSearch.findLastIndex(item => item.name === name);      }    } else {      this.#urlSearch.push({ name, value: `${value}` })    }  }  // sort all key/value pairs based on the keys  sort() {    this.#urlSearch.sort((a, b) => {      if (a.name < b.name) {        return -1;      }      if (a.name > b.name) {        return 1;      }      // names must be equal      return 0;    })  }  /**   * @return {string}   */  toString() {    return this.#urlSearch.map(({ name, value }) => `${name}=${value}`)      .join('&')  }  /**   * @return {Iterator} values   */  values() {    return this.#urlSearch.map(({ value }) => value)  }}