work and created develop branch

Example Code/Card/index.css

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+.card {
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
+    max-width: 80%;
+    margin: auto;
+    text-align: center;
+    padding: 1em;
+  }
+  
+  .close {
+    font-size: 1.5em;
+    float: right;
+    cursor: pointer;
+  }
+   

Example Code/Card/index.tsx

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+import React from "react";
+import "./index.css";
+class Card extends React.Component {
+
+constructor( props ) {
+    super(props)
+    this.state = { show : true };
+}
+
+render() {
+        return (
+            <div className="card" >
+                <span
+                    className="close" onClick={this.props.dataclick}
+                    datatitle={this.props.title}>&times;</span>
+                <h3>{this.props.title}</h3>
+                <p>{this.props.content}</p>
+            </div>
+        );
+    }
+
+}
+export default Card;