diff --git a/static/editor.js b/static/editor.js
new file mode 100644
index 0000000..1ae08cb
--- /dev/null
+++ b/static/editor.js
@@ -0,0 +1,14 @@
+(function () {
+	let changed = false;
+	let textarea = document.querySelector('.edit-form__textarea');
+
+	let warnBeforeClosing = function (ev) {
+		ev.preventDefault();
+		return ev.returnValue = 'Are you sure you want to exit? You have unsaved changes.';
+	};
+
+	textarea.addEventListener('input', function () {
+		if (!changed) window.addEventListener('beforeunload', warnBeforeClosing);
+		changed = true;
+	});
+})();
diff --git a/views/mutators.qtpl b/views/mutators.qtpl
index bd59829..c70906b 100644
--- a/views/mutators.qtpl
+++ b/views/mutators.qtpl
@@ -118,6 +118,7 @@
 {% endfunc %}
 
 {% func editScripts() %}
+<script src="/static/editor.js"></script>
 {% for _, scriptPath := range cfg.EditScripts %}
 <script src="{%s scriptPath %}"></script>
 {% endfor %}
diff --git a/views/mutators.qtpl.go b/views/mutators.qtpl.go
index c7da710..ae39d0d 100644
--- a/views/mutators.qtpl.go
+++ b/views/mutators.qtpl.go
@@ -359,47 +359,48 @@ func PreviewHTML(rq *http.Request, hyphaName, textAreaFill, message, warning str
 func streameditScripts(qw422016 *qt422016.Writer) {
 //line views/mutators.qtpl:120
 	qw422016.N().S(`
+<script src="/static/editor.js"></script>
 `)
-//line views/mutators.qtpl:121
+//line views/mutators.qtpl:122
 	for _, scriptPath := range cfg.EditScripts {
-//line views/mutators.qtpl:121
+//line views/mutators.qtpl:122
 		qw422016.N().S(`
 <script src="`)
-//line views/mutators.qtpl:122
+//line views/mutators.qtpl:123
 		qw422016.E().S(scriptPath)
-//line views/mutators.qtpl:122
+//line views/mutators.qtpl:123
 		qw422016.N().S(`"></script>
 `)
-//line views/mutators.qtpl:123
+//line views/mutators.qtpl:124
 	}
-//line views/mutators.qtpl:123
+//line views/mutators.qtpl:124
 	qw422016.N().S(`
 `)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 }
 
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 func writeeditScripts(qq422016 qtio422016.Writer) {
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	qw422016 := qt422016.AcquireWriter(qq422016)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	streameditScripts(qw422016)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	qt422016.ReleaseWriter(qw422016)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 }
 
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 func editScripts() string {
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	qb422016 := qt422016.AcquireByteBuffer()
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	writeeditScripts(qb422016)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	qs422016 := string(qb422016.B)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	qt422016.ReleaseByteBuffer(qb422016)
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 	return qs422016
-//line views/mutators.qtpl:124
+//line views/mutators.qtpl:125
 }