add tip about lang inject

htmgo-site/md/docs/4_interactivity/2_events.md

@@ -91,3 +91,15 @@ func MyButton() *h.Element {
 }
 ```
 
+tip: If you are using Jetbrains IDE's, you can write `// language=js` as a comment above the function call (h.EvalJS) and it will automatically give you syntax highlighting on the raw JS.
+
+```go
+// language=js
+h.EvalJs(`
+     if(Math.random() > 0.5) {
+         self.innerHTML = "Success!";
+     }
+     `,
+),
+```
+

htmgo-site/pages/index.go

@@ -5,6 +5,21 @@ import (
 	"htmgo-site/pages/base"
 )
 
+func Test() *h.Element {
+	return h.Button(
+		h.Text("Submit"),
+		h.OnClick(
+			// language=js
+			h.EvalJs(`
+				   if(Math.random() > 0.5) {
+				       self.innerHTML = "Success!";
+				   }
+		       `,
+			),
+		),
+	)
+}
+
 func IndexPage(ctx *h.RequestContext) *h.Page {
 	return h.NewPage(
 		base.RootPage(h.Div(
@@ -29,6 +44,7 @@ func IndexPage(ctx *h.RequestContext) *h.Page {
 						),
 					),
 				),
+				Test(),
 				h.Div(
 					h.Class("border-b border-b-slate-200 h-1"),
 					h.Div(