diff --git a/components/script/dom/htmltextareaelement.rs b/components/script/dom/htmltextareaelement.rs
index d03fb1a348c..459500da9a1 100755
--- a/components/script/dom/htmltextareaelement.rs
+++ b/components/script/dom/htmltextareaelement.rs
@@ -105,10 +105,13 @@ impl LayoutHTMLTextAreaElementHelpers for LayoutDom<HTMLTextAreaElement> {
 }
 
 // https://html.spec.whatwg.org/multipage/#attr-textarea-cols-value
-static DEFAULT_COLS: u32 = 20;
+const DEFAULT_COLS: u32 = 20;
 
 // https://html.spec.whatwg.org/multipage/#attr-textarea-rows-value
-static DEFAULT_ROWS: u32 = 2;
+const DEFAULT_ROWS: u32 = 2;
+
+const DEFAULT_MAX_LENGTH: i32 = -1;
+const DEFAULT_MIN_LENGTH: i32 = -1;
 
 impl HTMLTextAreaElement {
     fn new_inherited(local_name: LocalName,
@@ -192,6 +195,18 @@ impl HTMLTextAreaElementMethods for HTMLTextAreaElement {
     // https://html.spec.whatwg.org/multipage/#dom-textarea-placeholder
     make_setter!(SetPlaceholder, "placeholder");
 
+    // https://html.spec.whatwg.org/multipage/#attr-textarea-maxlength
+    make_int_getter!(MaxLength, "maxlength", DEFAULT_MAX_LENGTH);
+
+    // https://html.spec.whatwg.org/multipage/#attr-textarea-maxlength
+    make_limited_int_setter!(SetMaxLength, "maxlength", DEFAULT_MAX_LENGTH);
+
+    // https://html.spec.whatwg.org/multipage/#attr-textarea-minlength
+    make_int_getter!(MinLength, "minlength", DEFAULT_MIN_LENGTH);
+
+    // https://html.spec.whatwg.org/multipage/#attr-textarea-minlength
+    make_limited_int_setter!(SetMinLength, "minlength", DEFAULT_MIN_LENGTH);
+
     // https://html.spec.whatwg.org/multipage/#attr-textarea-readonly
     make_bool_getter!(ReadOnly, "readonly");
 
@@ -369,6 +384,34 @@ impl VirtualMethods for HTMLTextAreaElement {
                     }
                 }
             },
+            local_name!("maxlength") => {
+                match *attr.value() {
+                    AttrValue::Int(_, value) => {
+                        let mut textinput = self.textinput.borrow_mut();
+
+                        if value < 0 {
+                            textinput.set_max_length(None);
+                        } else {
+                            textinput.set_max_length(Some(value as usize))
+                        }
+                    },
+                    _ => panic!("Expected an AttrValue::Int"),
+                }
+            },
+            local_name!("minlength") => {
+                match *attr.value() {
+                    AttrValue::Int(_, value) => {
+                        let mut textinput = self.textinput.borrow_mut();
+
+                        if value < 0 {
+                            textinput.set_min_length(None);
+                        } else {
+                            textinput.set_min_length(Some(value as usize))
+                        }
+                    },
+                    _ => panic!("Expected an AttrValue::Int"),
+                }
+            },
             local_name!("placeholder") => {
                 {
                     let mut placeholder = self.placeholder.borrow_mut();
@@ -409,6 +452,8 @@ impl VirtualMethods for HTMLTextAreaElement {
         match *name {
             local_name!("cols") => AttrValue::from_limited_u32(value.into(), DEFAULT_COLS),
             local_name!("rows") => AttrValue::from_limited_u32(value.into(), DEFAULT_ROWS),
+            local_name!("maxlength") => AttrValue::from_limited_i32(value.into(), DEFAULT_MAX_LENGTH),
+            local_name!("minlength") => AttrValue::from_limited_i32(value.into(), DEFAULT_MIN_LENGTH),
             _ => self.super_type().unwrap().parse_plain_attribute(name, value),
         }
     }
diff --git a/components/script/dom/webidls/HTMLTextAreaElement.webidl b/components/script/dom/webidls/HTMLTextAreaElement.webidl
index f8f52c82b92..3839be24f5e 100644
--- a/components/script/dom/webidls/HTMLTextAreaElement.webidl
+++ b/components/script/dom/webidls/HTMLTextAreaElement.webidl
@@ -18,10 +18,10 @@ interface HTMLTextAreaElement : HTMLElement {
   readonly attribute HTMLFormElement? form;
   // [CEReactions]
   //          attribute DOMString inputMode;
-  // [CEReactions]
-  //          attribute long maxLength;
-  // [CEReactions]
-  //          attribute long minLength;
+  [CEReactions, SetterThrows]
+           attribute long maxLength;
+  [CEReactions, SetterThrows]
+           attribute long minLength;
            attribute DOMString name;
   [CEReactions]
            attribute DOMString placeholder;
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 79fcf7083e3..aec0bf3f927 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -347338,6 +347338,18 @@
      {}
     ]
    ],
+   "html/semantics/forms/the-textarea-element/textarea-maxlength.html": [
+    [
+     "/html/semantics/forms/the-textarea-element/textarea-maxlength.html",
+     {}
+    ]
+   ],
+   "html/semantics/forms/the-textarea-element/textarea-minlength.html": [
+    [
+     "/html/semantics/forms/the-textarea-element/textarea-minlength.html",
+     {}
+    ]
+   ],
    "html/semantics/forms/the-textarea-element/textarea-type.html": [
     [
      "/html/semantics/forms/the-textarea-element/textarea-type.html",
@@ -585051,6 +585063,14 @@
    "b61235681689807b5d46b8aaca9ae6c7a18039f7",
    "testharness"
   ],
+  "html/semantics/forms/the-textarea-element/textarea-maxlength.html": [
+   "fb2796fe7e542bd9551c18c0176a4f822ee347cd",
+   "testharness"
+  ],
+  "html/semantics/forms/the-textarea-element/textarea-minlength.html": [
+   "fcccb00d0db7222af1fb03e7481ccf31e51ec924",
+   "testharness"
+  ],
   "html/semantics/forms/the-textarea-element/textarea-newline-bidi-ref.html": [
    "26eb3e615f8b0e15cf02b7ee18d39fd71b04da70",
    "support"
diff --git a/tests/wpt/metadata/html/dom/reflection-forms.html.ini b/tests/wpt/metadata/html/dom/reflection-forms.html.ini
index 886ddb659db..e66f44b15d7 100644
--- a/tests/wpt/metadata/html/dom/reflection-forms.html.ini
+++ b/tests/wpt/metadata/html/dom/reflection-forms.html.ini
@@ -10263,189 +10263,6 @@
   [textarea.inputMode: IDL set to "URL" followed by IDL get]
     expected: FAIL
 
-  [textarea.maxLength: typeof IDL attribute]
-    expected: FAIL
-
-  [textarea.maxLength: IDL get with DOM attribute unset]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -2147483649 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -2147483648 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -36 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -1 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -0 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 0 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 1 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 2147483647 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 2147483648 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 4294967295 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 4294967296 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "-1" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "-0" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "0" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "1" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " \\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07 \\b\\t\\n\\v\\f\\r\\x0e\\x0f \\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17 \\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f  foo " followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\t7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\v7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\f7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\n7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\r7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "
7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "
7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "᠎7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "　7" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to undefined followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 1.5 followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to true followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to false followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "[object Object\]" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to NaN followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to Infinity followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -Infinity followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\0" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "2" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "3" followed by IDL get]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -2147483648 must throw INDEX_SIZE_ERR]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -36 must throw INDEX_SIZE_ERR]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -1 must throw INDEX_SIZE_ERR]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 0 followed by getAttribute()]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 1 followed by getAttribute()]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 2147483647 followed by getAttribute()]
-    expected: FAIL
-
   [textarea.itemScope: typeof IDL attribute]
     expected: FAIL
 
@@ -21909,183 +21726,6 @@
   [textarea.inputMode: IDL set to "URL"]
     expected: FAIL
 
-  [textarea.maxLength: setAttribute() to -2147483649]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -2147483648]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -36]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -1]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -0]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 0]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 1]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 2147483647]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 2147483648]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 4294967295]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 4294967296]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to ""]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "-1"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "-0"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "0"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "1"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " \\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07 \\b\\t\\n\\v\\f\\r\\x0e\\x0f \\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17 \\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f  foo "]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\t7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\v7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\f7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\n7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\r7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "
7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "
7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "᠎7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "　7"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to undefined]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to 1.5]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to true]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to false]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "[object Object\]"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to NaN]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to Infinity]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to -Infinity]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to "\\0"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "2"]
-    expected: FAIL
-
-  [textarea.maxLength: setAttribute() to object "3"]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -2147483648]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -36]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to -1]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 0]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 1]
-    expected: FAIL
-
-  [textarea.maxLength: IDL set to 2147483647]
-    expected: FAIL
-
   [textarea.rows: IDL set to 0]
     expected: FAIL
 
@@ -24261,189 +23901,6 @@
   [textarea.inputMode: IDL set to "Kana-name"]
     expected: FAIL
 
-  [textarea.minLength: typeof IDL attribute]
-    expected: FAIL
-
-  [textarea.minLength: IDL get with DOM attribute unset]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -2147483649]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -2147483648]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -36]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -1]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -0]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 0]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 1]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 2147483647]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 2147483648]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 4294967295]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 4294967296]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to ""]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "-1"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "-0"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "0"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "1"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " \\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07 \\b\\t\\n\\v\\f\\r\\x0e\\x0f \\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17 \\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f  foo "]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\t7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\v7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\f7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\n7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\r7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "
7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "
7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "᠎7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to " 7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "　7"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to undefined]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to 1.5]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to true]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to false]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to object "[object Object\]"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to NaN]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to Infinity]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to -Infinity]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to "\\0"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to object "2"]
-    expected: FAIL
-
-  [textarea.minLength: setAttribute() to object "3"]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to -2147483648]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to -36]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to -1]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to 0]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to 1]
-    expected: FAIL
-
-  [textarea.minLength: IDL set to 2147483647]
-    expected: FAIL
-
   [meter.value: typeof IDL attribute]
     expected: FAIL
 
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-maxlength.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-maxlength.html
new file mode 100644
index 00000000000..ff4e8f1b65c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-maxlength.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <title>textarea maxlength</title>
+  <link rel="author" title="tigercosmos" href="mailto:phy.tiger@gmail.com">
+  <link rel=help href="https://html.spec.whatwg.org/multipage/#attr-textarea-maxlength">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+
+<body>
+
+  <textarea id="none"></textarea>
+  <textarea id="negative" maxlength="-5"></textarea>
+  <textarea id="non-numeric" maxlength="not-a-number"></textarea>
+  <textarea id="assign-negative"></textarea>
+  <textarea id="assign-non-numeric"></textarea>
+
+  <script>
+    test(
+      function () {
+        assert_equals(document.getElementById("none").maxLength, -1);
+      }, "Unset maxlength is -1");
+
+    test(
+      function () {
+        assert_equals(document.getElementById("negative").maxLength, -1);
+      }, "Negative maxlength is always -1");
+
+    test(
+      function () {
+        assert_equals(document.getElementById("non-numeric").maxLength, -1);
+      }, "Non-numeric maxlength is -1");
+
+    test(
+      function () {
+        assert_throws("INDEX_SIZE_ERR", function () {
+          document.getElementById("assign-negative").maxLength = -5;
+        });
+      }, "Assigning negative integer throws IndexSizeError");
+
+    test(
+      function () {
+        document.getElementById("assign-non-numeric").maxLength = "not-a-number";
+        assert_equals(document.getElementById("assign-non-numeric").maxLength, 0);
+      }, "Assigning non-numeric to maxlength sets maxlength to 0");
+  </script>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-minlength.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-minlength.html
new file mode 100644
index 00000000000..9a15a129392
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-textarea-element/textarea-minlength.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <title>textarea minlength</title>
+  <link rel="author" title="tigercosmos" href="mailto:phy.tiger@gmail.com">
+  <link rel=help href="https://html.spec.whatwg.org/multipage/#attr-textarea-minlength">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+
+<body>
+
+  <textarea id="none"></textarea>
+  <textarea id="negative" minlength=-5></textarea>
+  <textarea id="non-numeric" minlength="not-a-number"></textarea>
+  <textarea id="assign-negative"></textarea>
+  <textarea id="assign-non-numeric"></textarea>
+
+  <script>
+    test(
+      function () {
+        assert_equals(document.getElementById("none").minLength, -1);
+      }, "Unset minlength is -1");
+
+    test(
+      function () {
+        assert_equals(document.getElementById("negative").minLength, -1);
+      }, "Negative minlength is always -1");
+
+    test(
+      function () {
+        assert_equals(document.getElementById("non-numeric").minLength, -1);
+      }, "Non-numeric minlength is -1");
+
+    test(
+      function () {
+        assert_throws("INDEX_SIZE_ERR", function () {
+          document.getElementById("assign-negative").minLength = -5;
+        });
+      }, "Assigning negative integer throws IndexSizeError");
+
+    test(
+      function () {
+        document.getElementById("assign-non-numeric").minLength = "not-a-number";
+        assert_equals(document.getElementById("assign-non-numeric").minLength, 0);
+      }, "Assigning non-numeric to minlength sets minlength to 0");
+  </script>
+</body>
+
+</html>
\ No newline at end of file