implement range input sanitization

tests/wpt/metadata/MANIFEST.json

@@ -550473,7 +550473,7 @@
    "testharness"
   ],
   "html/semantics/forms/the-input-element/range.html": [
-   "dd51c517a149c51e939a30dcad5e93f196e35cff",
+   "e992526fb5f117456a870e52c84eab5a7f4b14ab",
    "testharness"
   ],
   "html/semantics/forms/the-input-element/required_attribute.html": [

tests/wpt/metadata/html/semantics/forms/the-input-element/range-2.html.ini

@@ -9,6 +9,6 @@
   [range input value equals 100]
     expected: FAIL
 
-  [range input value equals 2]
+  [range input value set to an integer]
     expected: FAIL
 

tests/wpt/metadata/html/semantics/forms/the-input-element/range.html.ini

@@ -21,9 +21,6 @@
   [default value when both min and max attributes are given, while min > max]
     expected: FAIL
 
-  [The default step scale factor is 1, unless min attribute has non-integer value]
-    expected: FAIL
-
   [Step scale factor behavior when min attribute has integer value but max attribute is non-integer ]
     expected: FAIL
 

tests/wpt/web-platform-tests/html/semantics/forms/the-input-element/range.html

@@ -34,6 +34,9 @@
       <input type="range" id="stepdown_beyond_min" min=3 max=11 value=6 step=3 />
       <input type="range" id="illegal_min_and_max" min="ab" max="f" />
       <input type="range" id="illegal_value_and_step" min=0 max=5 value="ppp" step="xyz" />
+      <input type="range" id="should_skip_whitespace" value=" 123"/>
+      <input type="range" id="exponent_value1" value=""/>
+      <input type="range" id="exponent_value2" value=""/>
     </div>
 
     <div id="log">
@@ -280,6 +283,35 @@
         }
       );
 
+      test(
+        function() {
+          var e = document.getElementById('should_skip_whitespace');
+          assert_equals(e.value, "123")
+        }, "Skip ASCII whitespace within input", {
+          "help" : "https://html.spec.whatwg.org/multipage/#best-representation-of-the-number-as-a-floating-point-number"
+        }
+      );
+
+      test(
+        function() {
+          var e = document.getElementById('exponent_value1');
+          e.value = 1e2;
+          assert_equals(e.value, "100")
+        }, "Multiply value by ten raised to the exponentth power with `e`", {
+          "help" : "https://html.spec.whatwg.org/multipage/#best-representation-of-the-number-as-a-floating-point-number"
+        }
+      );
+
+      test(
+        function() {
+          var e = document.getElementById('exponent_value2');
+          e.value = 1E2;
+          assert_equals(e.value, "100")
+        }, "Multiply value by ten raised to the exponentth power with `E`", {
+          "help" : "https://html.spec.whatwg.org/multipage/#best-representation-of-the-number-as-a-floating-point-number"
+        }
+      );
+
     </script>
 
   </body>