diff --git a/files/en-us/_redirects.txt b/files/en-us/_redirects.txt
index 4f9afbc1d205d5a..d1f9cd5718596a6 100644
--- a/files/en-us/_redirects.txt
+++ b/files/en-us/_redirects.txt
@@ -1728,7 +1728,6 @@
 /en-US/docs/DOM/StorageEvent	/en-US/docs/Web/API/StorageEvent
 /en-US/docs/DOM/StyleSheetList	/en-US/docs/Web/API/StyleSheetList
 /en-US/docs/DOM/Text	/en-US/docs/Web/API/Text
-/en-US/docs/DOM/Text.isElementContentWhitespace	/en-US/docs/Web/API/Text/isElementContentWhitespace
 /en-US/docs/DOM/Text.replaceWholeText	/en-US/docs/Web/API/Text/replaceWholeText
 /en-US/docs/DOM/Text.splitText	/en-US/docs/Web/API/Text/splitText
 /en-US/docs/DOM/Text.wholeText	/en-US/docs/Web/API/Text/wholeText
@@ -3067,7 +3066,6 @@
 /en-US/docs/Document_Object_Model_(DOM)/StyleSheet/title	/en-US/docs/Web/API/StyleSheet/title
 /en-US/docs/Document_Object_Model_(DOM)/StyleSheet/type	/en-US/docs/Web/API/StyleSheet/type
 /en-US/docs/Document_Object_Model_(DOM)/Text	/en-US/docs/Web/API/Text
-/en-US/docs/Document_Object_Model_(DOM)/Text.isElementContentWhitespace	/en-US/docs/Web/API/Text/isElementContentWhitespace
 /en-US/docs/Document_Object_Model_(DOM)/Text.replaceWholeText	/en-US/docs/Web/API/Text/replaceWholeText
 /en-US/docs/Document_Object_Model_(DOM)/Text.splitText	/en-US/docs/Web/API/Text/splitText
 /en-US/docs/Document_Object_Model_(DOM)/Text.wholeText	/en-US/docs/Web/API/Text/wholeText
@@ -8604,7 +8602,6 @@
 /en-US/docs/Web/API/SubtleCrypto.verify	/en-US/docs/Web/API/SubtleCrypto/verify
 /en-US/docs/Web/API/SubtleCrypto.wrapKey	/en-US/docs/Web/API/SubtleCrypto/wrapKey
 /en-US/docs/Web/API/Text.Text	/en-US/docs/Web/API/Text/Text
-/en-US/docs/Web/API/Text.isElementContentWhitespace	/en-US/docs/Web/API/Text/isElementContentWhitespace
 /en-US/docs/Web/API/Text.replaceWholeText	/en-US/docs/Web/API/Text/replaceWholeText
 /en-US/docs/Web/API/Text.splitText	/en-US/docs/Web/API/Text/splitText
 /en-US/docs/Web/API/Text.wholeText	/en-US/docs/Web/API/Text/wholeText
diff --git a/files/en-us/_wikihistory.json b/files/en-us/_wikihistory.json
index 766ad9b61df4454..211c77c27bdf093 100644
--- a/files/en-us/_wikihistory.json
+++ b/files/en-us/_wikihistory.json
@@ -80699,23 +80699,6 @@
       "jpmedley"
     ]
   },
-  "Web/API/Text/isElementContentWhitespace": {
-    "modified": "2020-10-15T21:06:49.084Z",
-    "contributors": [
-      "RainSlide",
-      "nakhodkiin",
-      "sideshowbarker",
-      "fscholz",
-      "teoli",
-      "afreen",
-      "Reachmeatshivam",
-      "Sheppy",
-      "ziyunfei",
-      "Ruakh",
-      "Jürgen Jeka",
-      "bcombee"
-    ]
-  },
   "Web/API/Text/replaceWholeText": {
     "modified": "2020-10-15T21:10:09.962Z",
     "contributors": [
diff --git a/files/en-us/web/api/text/index.html b/files/en-us/web/api/text/index.html
index 308a702f9a4383e..04e40b055c6c592 100644
--- a/files/en-us/web/api/text/index.html
+++ b/files/en-us/web/api/text/index.html
@@ -47,10 +47,6 @@ <h2 id="Properties">Properties</h2>
 <dl>
  <dt>{{domxref("Text.assignedSlot")}} {{readonlyInline}}</dt>
  <dd>Returns a {{domxref("HTMLSlotElement")}} representing the {{htmlelement("slot")}} the node is inserted in.</dd>
- <dt>{{domxref("Text.isElementContentWhitespace")}} {{readonlyInline}}{{deprecated_inline}}</dt>
- <dd>
- <p>Returns a boolean flag indicating whether or not the text node contains only whitespace.</p>
- </dd>
  <dt>{{domxref("Text.wholeText")}} {{readonlyInline}}</dt>
  <dd>Returns a {{domxref("DOMString")}} containing the text of all <code>Text</code> nodes logically adjacent to this {{domxref("Node")}}, concatenated in document order.</dd>
 </dl>
diff --git a/files/en-us/web/api/text/iselementcontentwhitespace/index.html b/files/en-us/web/api/text/iselementcontentwhitespace/index.html
deleted file mode 100644
index c28fb2dc2b612e0..000000000000000
--- a/files/en-us/web/api/text/iselementcontentwhitespace/index.html
+++ /dev/null
@@ -1,46 +0,0 @@
----
-title: Text.isElementContentWhitespace
-slug: Web/API/Text/isElementContentWhitespace
-tags:
-  - API
-  - DOM
-  - Deprecated
-  - Property
-  - Text
-browser-compat: api.Text.isElementContentWhitespace
----
-<p>{{ApiRef("DOM")}}{{deprecated_header}}</p>
-
-<div class="notecard note">
-<p><strong>Note:</strong> You may replace it with <code>/\s+/.test(Text.data)</code>, <code>/\s+/.test(Text.nodeValue)</code>, or <code>/\s+/.test(Text.textContent)</code>. Putting any property that represents the textual content of the <code>Text</code> node into <code>test()</code> should do the same work just like the three example above.</p>
-</div>
-
-<p>The <strong><code>Text.isElementContentWhitespace</code></strong> read-only property returns a boolean flag indicating whether or not the text node's content consists solely of whitespace.</p>
-
-<h2 id="Syntax">Syntax</h2>
-
-<pre class="brush: js"><em>b</em> = <em>textnode</em>.isElementContentWhitespace;</pre>
-
-<h2 id="Example">Example</h2>
-
-<p>In the example below, we create a node with mixed display and whitespace characters and the attribute is <code>false</code>.</p>
-
-<pre class="brush: js">var tn = document.createTextNode("Hello world");
-tn.isElementContentWhitespace; /* evaluates to false */
-</pre>
-
-<p>For a node that is all whitespace characters, the <code>isElementContentWhitespace</code> evaluates to true.</p>
-
-<pre class="brush: js">var ws = document.createTextNode("  \t \r\n   ")
-ws.isElementContentWhitespace; /* evaluates to true */
-</pre>
-
-<h2 id="Browser_compatibility">Browser compatibility</h2>
-
-<p>{{Compat}}</p>
-
-<h2 id="See_also">See also</h2>
-
-<ul>
- <li>The {{domxref("Text")}} interface it belongs to.</li>
-</ul>