diff --git a/files/en-us/web/html/content_categories/index.md b/files/en-us/web/html/content_categories/index.md
index 54ebcaa70660e34..6c128830c775f18 100644
--- a/files/en-us/web/html/content_categories/index.md
+++ b/files/en-us/web/html/content_categories/index.md
@@ -52,6 +52,7 @@ The flow elements are:
 - {{HTMLElement("del")}}
 - {{HTMLElement("details")}}
 - {{HTMLElement("dfn")}}
+- {{HTMLElement("dialog")}}
 - {{HTMLElement("div")}}
 - {{HTMLElement("dl")}}
 - {{HTMLElement("em")}}
@@ -95,9 +96,11 @@ The flow elements are:
 - {{HTMLElement("ruby")}}
 - {{HTMLElement("s")}}
 - {{HTMLElement("samp")}}
+- {{HTMLElement("search")}}
 - {{HTMLElement("script")}}
 - {{HTMLElement("section")}}
 - {{HTMLElement("select")}}
+- {{HTMLElement("slot")}}
 - {{HTMLElement("small")}}
 - {{HTMLElement("span")}}
 - {{HTMLElement("strong")}}
@@ -113,6 +116,7 @@ The flow elements are:
 - {{HTMLElement("var")}}
 - {{HTMLElement("video")}}
 - {{HTMLElement("wbr")}}
+- Plain text
 
 A few other elements belong to this category, but only if a specific condition is fulfilled:
 
@@ -146,6 +150,7 @@ Elements belonging to this category are:
 - {{HTMLElement("abbr")}}
 - {{HTMLElement("audio")}}
 - {{HTMLElement("b")}}
+- {{HTMLElement("bdi")}}
 - {{HTMLElement("bdo")}}
 - {{HTMLElement("br")}}
 - {{HTMLElement("button")}}
@@ -221,7 +226,6 @@ Embedded content is a subset of flow content that imports another resource or in
 
 Interactive content is a subset of flow content that includes elements that are specifically designed for user interaction, and can be used everywhere flow content is expected. Elements that belong to this category include:
 
-- {{HTMLElement("a")}}
 - {{HTMLElement("button")}}
 - {{HTMLElement("details")}}
 - {{HTMLElement("embed")}}
@@ -231,6 +235,7 @@ Interactive content is a subset of flow content that includes elements that are
 
 Some elements belong to this category only under specific conditions:
 
+- {{HTMLElement("a")}}, if the [`href`](/en-US/docs/Web/HTML/Element/a#href) attribute is present
 - {{HTMLElement("audio")}}, if the [`controls`](/en-US/docs/Web/HTML/Element/audio#controls) attribute is present
 - {{HTMLElement("img")}}, if the [`usemap`](/en-US/docs/Web/HTML/Element/img#usemap) attribute is present
 - {{HTMLElement("input")}}, if the [type](/en-US/docs/Web/HTML/Element/input#type) attribute is not in the hidden state