diff --git a/snippet-template.md b/snippet-template.md
index 8984fe93e..d57150e6f 100644
--- a/snippet-template.md
+++ b/snippet-template.md
@@ -23,6 +23,12 @@ class ComponentName extends React.Component {
 ReactDOM.render(<ComponentName />, mountNode);
 ```
 
+<!-- OPTIONAL -->
+#### Notes:
+* Things to remember when using this
+* Other options that might be less appealing or have lower compatibility
+* Common mistakes and issues
+
 <!-- tags: (separate each by a comma) -->
 
 <!-- expertise: (0,1,2,3) -->
diff --git a/snippets/ModalDialog.md b/snippets/ModalDialog.md
new file mode 100644
index 000000000..1dc392699
--- /dev/null
+++ b/snippets/ModalDialog.md
@@ -0,0 +1,141 @@
+### ModalDialog
+
+Renders a dialog component in a modal, controllable through events. 
+To use the component, import `ModalDialog` only once and then display it using `ModalDialog.show()`, passing the JSX templates and data as parameters.
+
+Define `modalHandler`, a method that will handle showing the modal dialog, set `state` to the default values initially and bind the `close` and `modalClick` methods to the component's context.
+Define `close` and `modalClick` to toggle the visibility of the modal dialog, based on `state.closeOnClick`.
+Use the CustomEvent API to listen for `modal` events, that can be dispatched from the `static` `show()` method, handle listeners appropriately from `componentDidMount` and `componentWillUnmount`.
+
+The `show()` method accepts an argument, that should contain three parameters:
+* `title`, a string for the dialog's title
+* `closeOnClick`, `true` if the modal should close on click or `false` if it should only close when clicking the *X* button
+* `content`, which is the JSX content to be rendered inside the dialog
+
+Finally, in the `render()` method, use a `<div>` to wrap everything and render the modal dialog with the content passed to `show()`.
+
+```css
+  .modal {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(0, 0, 0, 0.6);
+    z-index: 9998;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+  }
+  .dialog {
+    background-color: white;
+    border-radius: 5px;
+    overflow: hidden;
+  }
+  .dialog-title {
+    box-sizing: border-box;
+    width: 100%;
+    height: 48px;
+    padding: 0 16px;
+    border-bottom: 0.5px solid #c3c3c3;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+  }
+  .dialog-close {
+    font-size: 32px;
+    color: #c3c3c3;
+    cursor: pointer;
+    transform: rotate(45deg);
+    user-select: none;
+  }
+  .dialog-close:hover {
+    color: red;
+  }
+  .dialog-content {
+    min-width: 300px;
+  }
+```
+
+```jsx
+class ModalDialog extends React.Component {
+  constructor() {
+    super();
+    this.modalHandler = (e) => {
+      this.setState({
+        data: e.detail.data,
+        visible: true
+      });
+    };
+    this.state = {
+      data: {
+        title: '',
+        closeOnClick: false,
+        content: ''
+      },
+      visible: false
+    };
+    this.close = this.close.bind(this);
+    this.modalClick = this.modalClick.bind(this);
+  }
+  render() {
+    return !this.state.visible ? null : <div className="modal" onClick={this.modalClick}>
+      <div className="dialog">
+        <div className="dialog-title">{ this.state.data.title }<span className="dialog-close" onClick={this.close}>+</span></div>
+        <div className="dialog-content">
+          {
+            this.state.data.content
+          }
+        </div>
+      </div>
+    </div>
+  }
+  componentDidMount() {
+    document.addEventListener('modal', this.modalHandler);
+  }
+  componentWillUnmount() {
+    document.removeEventListener('modal', this.modalHandler);
+  }
+  close() {
+    this.setState({
+      visible: false,
+      data: {
+        title: '',
+        closeOnClick: false,
+        content: ''
+      }
+    });
+  }
+  static show(data) {
+    document.dispatchEvent(new CustomEvent('modal', {
+      detail: {
+        data
+      }
+    }));
+  }
+  modalClick() {
+    if (this.state.data.closeOnClick) this.close();
+  }
+}
+```
+
+```jsx
+// add to render function
+<ModalDialog />
+
+// every time you wanna call the dialog
+// content is a jsx element
+ModalDialog.show({
+  title: 'Hello, world!',
+  closeOnClick: true,
+  content: <img src="https://github.com/30-seconds/30-seconds-of-react/blob/master/logo.png"/>
+});  
+```
+
+#### Notes:
+* This component includes a lot of CSS, which might conflict with other CSS in your project.
+* A more up-to-date method with lower compatibility is to use [Portals](https://reactjs.org/docs/portals.html) in React 16+.
+
+<!-- tags: visual,static,children,state,class -->
+
+<!-- expertise: 1 -->