URLクエリ情報を取得
https://example.com/index.php?foo=test&var=sample
-const params = new URLSearchParams(document.location.search)
const foo = params.get('foo') || ''
console.log(foo)
> test
const params = new URLSearchParams(document.location.search)
const foo = params.get('foo') || ''
console.log(foo)
> test