diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-manual.tentative.html
new file mode 100644
index 0000000000000..9e513eb836fc7
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-manual.tentative.html
@@ -0,0 +1,19 @@
+
+
+Selection drag and drop: events for contenteditable
+
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-same-element-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-same-element-manual.tentative.html
new file mode 100644
index 0000000000000..907306301fa0b
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-contenteditable-same-element-manual.tentative.html
@@ -0,0 +1,15 @@
+
+
+Selection drag and drop: events for contenteditable (same element)
+
+
+
+Drag me ...to here:
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-input-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-input-manual.tentative.html
new file mode 100644
index 0000000000000..2f9914cca957d
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-input-manual.tentative.html
@@ -0,0 +1,16 @@
+
+
+Selection drag and drop: events for <input>
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-input-same-element-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-input-same-element-manual.tentative.html
new file mode 100644
index 0000000000000..8a578d51ad6b5
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-input-same-element-manual.tentative.html
@@ -0,0 +1,15 @@
+
+
+Selection drag and drop: events for <input> (same element)
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-manual.tentative.html
new file mode 100644
index 0000000000000..7fb8bf437f8e4
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-manual.tentative.html
@@ -0,0 +1,16 @@
+
+
+Selection drag and drop: events for <textarea>
+
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-same-element-manual.tentative.html b/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-same-element-manual.tentative.html
new file mode 100644
index 0000000000000..c856fd4fbead2
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/events-textarea-same-element-manual.tentative.html
@@ -0,0 +1,15 @@
+
+
+Selection drag and drop: events for <textarea> (same element)
+
+
+
+
+
+
diff --git a/testing/web-platform/tests/html/editing/dnd/drop/support/events.js b/testing/web-platform/tests/html/editing/dnd/drop/support/events.js
new file mode 100644
index 0000000000000..015cead3853c1
--- /dev/null
+++ b/testing/web-platform/tests/html/editing/dnd/drop/support/events.js
@@ -0,0 +1,31 @@
+setup({ explicit_timeout: true, single_test: true });
+function rAF() {
+ return new Promise(resolve => {
+ requestAnimationFrame(resolve);
+ });
+}
+const a = document.getElementById('a');
+const b = document.getElementById('b');
+const actualEvents = [];
+const expectedEvents = document.body.dataset.expectedEvents.replace(/\s+/g, '').split(',');
+const eventTypes = new Set(expectedEvents.map(s => s.split(':')[1]));
+for (const eventType of eventTypes) {
+ if (a) {
+ a.addEventListener(eventType, e => {
+ actualEvents.push(`a:${e.type}:${e.inputType || ''}`);
+ });
+ }
+ b.addEventListener(eventType, async (e) => {
+ actualEvents.push(`b:${e.type}:${e.inputType || ''}`);
+ if (e.type === "input") {
+ await rAF();
+ await rAF();
+ assert_array_equals(actualEvents, expectedEvents);
+ done();
+ }
+ });
+}
+const dragMeElement = document.querySelector('[data-select]');
+const [selectionStart, selectionEnd] = dragMeElement.dataset.select.split(',').map(s => parseInt(s, 10));
+setSelection(dragMeElement, selectionStart, selectionEnd);
+dragMeElement.focus();