定制器中的选择性刷新 – Previously, some changes in customizer required entire page reload. WordPress 4.5 comes with a framework to allow selective refresh in the customizer. It is fast and will allow developers to do great things with live previews. (#27355).
可定制的嵌入模板 – WordPress 4.4 introduced embeds which allowed users to embed posts from their own and other WordPress blogs. WordPress 4.5 makes embed templates customizable so that theme authors can adjust embed display to match their theme. (#34561)