diff --git a/dairy.js b/dairy.js
new file mode 100644
index 0000000..861fe75
--- /dev/null
+++ b/dairy.js
@@ -0,0 +1,33 @@
+class Dairy {
+    constructor(date,weather,content) {
+        this.date = date;
+        this.weather = weather;
+        this.content = content;
+        this._clear = clearDairy.bind(this);
+    }
+    printDairy () {
+        console.log(this.date);
+        console.log(this.weather);
+        console.log(this.content);
+    }
+    addClearEvent () {
+        document.addEventListener('click', this._clear, false);
+    }
+    removeClearEvent () {
+        document.removerEventListener('click', this._clear,  false);
+    }
+}
+
+let date = '2019-06-20';
+let weather = 'rainy';
+let content  = 'it is a rainyday,and i am so upset.' 
+
+let newDairy = new Dairy(date,weather,content);
+newDairy.printDairy();
+
+
+function clearDairy(dairy){
+    dairy.date = '';
+    dairy.weather = '';
+    dairy.content = '';
+}
\ No newline at end of file