Resolve #875 (#963)
Resolve #875 (#963)

* docs(api): pick up original commit

ref: https://github.com/vuejs/vuejs.org/commit/61dd82e40fc23302234b518a05216150d4a1a4ea

* docs(api): translate $refs

closes #875

vuejs/jp.vuejs.org,vuejs/jp.vuejs.org,potato4d/jp.vuejs.org,potato4d/jp.vuejs.org