URL の先頭に二重スラッシュを使用してプロトコルを継承することには、何か欠点がありますか? 例: src="//domain.example" 質問する

I have a stylesheet that loads images from an external domain and I need it to load from https:// from secure order pages and http:// from other pages, based on the current URL. I found that starting the URL with a double slash inherits the current protocol. Do all browsers support this technique?

HTML ex:

<img src="//cdn.domain.example/logo.png" />

CSS ex:

.class { background: url(//cdn.domain.example/logo.png); }