tabindexThe tabindex HTML attribute make an element focusable, and sets the element's relative ordering for sequential focus navigation.htmlHTMLwidely2018-10-022021-04-02https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindextabindex-attrhttps://developer.mozilla.org/docs/Web/API/HTMLElement/tabIndexapi.HTMLElement.tabIndexhtml.global_attributes.tabindexhttps://nowyoucanuse.com/features--tabindex.html