# Custom APEX Notification Messages



Ever wonder how APEX generates error messages (shown below)? Want to create your own? Starting in APEX 5.1 you can create your own error and success messages using the [`apex.message`](https://docs.oracle.com/database/apex-5.1/AEAPI/apex-message-namespace.htm#AEAPI-GUID-D15040D1-6B1A-4267-8DF7-B645ED1FDA46) library.

{% asset_img apex-error-message.png %}

The following demos show how to create custom error and success messages in JavaScript.

## Error Messages

```js
apex.message.clearErrors();

apex.message.showErrors([
  {
    type: apex.message.TYPE.ERROR,
    location: ["page", "inline"],
    pageItem: "P1_DEMO",
    message: "This field is required",
    unsafe: false
  },
  {
    type: apex.message.TYPE.ERROR,
    location: ["page"],
    message: "Page level error",
    unsafe: false
  }
]);
```
</br>

{% asset_img apex-custom-error-message.png %}

## Success Message

```js
apex.message.clearErrors();

apex.message.showPageSuccess( "It works!" );
```

</br>

{% asset_img apex-custom-success-message.png %}

## Wrap up
For more examples and full documentation read the [`apex.message`](https://docs.oracle.com/database/apex-5.1/AEAPI/apex-message-namespace.htm#AEAPI-GUID-D15040D1-6B1A-4267-8DF7-B645ED1FDA46) documentation.

The {% post_link how-to-save-page-data-but-show-errors-in-apex next post %} covers how to leverage the `apex_message` API to simulate an error in APEX without an error happening (it will also cover why you'd want to do this).