diff --git a/bricks/datagrid.js b/bricks/datagrid.js
index 38d457c..ce18101 100644
--- a/bricks/datagrid.js
+++ b/bricks/datagrid.js
@@ -160,8 +160,8 @@ bricks.DataGrid = class extends bricks.VBox {
 		}
 		if (this.opts.toolbar) {
 			this.admin_bar.add_widget(new bricks.Filler({}));
-			self.toolbar = new bricks.Toolbar(this.opts.toolbar);
-			self.toolbar.bind('command', this.command_handle.bind(this));
+			this.toolbar = new bricks.Toolbar(this.opts.toolbar);
+			this.toolbar.bind('command', this.command_handle.bind(this));
 			this.admin_bar.add_widget(this.toolbar);
 		}
 		this.create_parts();
diff --git a/bricks/rtc.js b/bricks/rtc.js
index b4f4253..4e4a268 100644
--- a/bricks/rtc.js
+++ b/bricks/rtc.js
@@ -65,7 +65,7 @@ bricks.Signaling = class {
 	}
 	del_handler(sessionid){
 		var handlers = {};
-		delete self.handlers[sessionid];
+		delete this.handlers[sessionid];
 	}
 	async signaling_recvdata(event){
         var datapkg = JSON.parse(event.data);
diff --git a/bricks/widget.js b/bricks/widget.js
index 1d8704c..396d8ac 100644
--- a/bricks/widget.js
+++ b/bricks/widget.js
@@ -378,7 +378,7 @@ bricks.TextBase = class extends bricks.JsWidget {
 		if (options.wrap){
 			this.set_style('flexWrap', 'wrap');
 		}
-		if (self.i18n){
+		if (this.i18n){
 			bricks.app.bind('lang', this.set_i18n_text.bind(this));
 		}
 	}