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JavaScript でURLのクエリ文字列を取得する

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JavaScript でURLのクエリ文字列を取得する。

現在開いているページのクエリ文字列を取得する

locationオブジェクトのsearchプロパティを利用する。

const query = location.search;

正規表現を使って、URLを表す文字列からクエリ文字列を抽出する

クエリ文字列がない場合、定数queryの値は空文字となる。

const url = 'https://example.com?a=123';
const query = url.replace(/^.*?(\?|$)/, '$1');
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