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URLからホスト名やクエリ文字列を取得する

Posted at

url.png

URL

URL - Web API | MDN

let url = new URL("https://site.com:4097/URL/index.html?d1=1&d2=2#item");
プロパティ
url.href https://site.com:4097/URL/index.html?d1=1&d2=2#item
url.origin https://site.com:4097
url.host site.com:4097
url.protocol https:
url.hostname site.com
url.port 4097
url.pathname /URL/index.html
url.search ?d1=1&d2=2
url.hash #item
url.username
url.password
url.searchParams URLSearchParams オブジェクトを返す。

ポート番号がスキームのデフォルトポートの場合

TCPやUDPにおけるポート番号の一覧 - Wikipedia

//443はhttpsのデフォルトポート
let url = new URL("https://site.com:443/URL/index.html");
プロパティ
url.href https://site.com/URL/index.html
url.origin https://site.com
url.host site.com
url.port

URLSearchParams

URLSearchParams - Web API | MDN

//サイトURL:https://site.com:4097/URL/index.html?d1=1&d2=2
let searchParams = new URLSearchParams(window.location.search);
メソッド 内容
searchParams.has("d1") パラメータの有無 true
searchParams.get("d1") パラメータの値の取得 1
searchParams.set("d3",4) パラメータd3に4を設定
searchParams.delete("d1") パラメータの削除
searchParams.toString() クエリ文字列作成 d2=2&d3=4
Object.fromEntries(searchParams) オブジェクトに変換 { d2: "2", d3: "4" }

その他のメソッド entriesforEachkeysvaluesappendgetAllsort

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