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**NOTE**: `@ebay/nice-modal-react` is not a React modal component but should be used with other modal/dialog implementions by UI libraries like [Material UI](https://material-ui.com/), [Ant.Design](https://ant.design), [Bootstrap React](https://react-bootstrap.github.io/), etc.
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**NOTE**: `@ebay/nice-modal-react` is not a React modal component but should be used with other modal/dialog implementations by UI libraries like [Material UI](https://material-ui.com/), [Ant.Design](https://ant.design), [Bootstrap React](https://react-bootstrap.github.io/), etc.
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# Examples
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You can see a list of examples at: https://ebay.github.io/nice-modal-react
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* Easy to integrate with any UI library.
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# Motivation
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Using modals in React is a bit frustrating. Think of that if you need to implement below UI:
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Using modals in React is a bit frustrating. Think of that if you need to implement the below UI:
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<imgsrc="images/modal-example.jpg"width="700px"/>
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The dialog is used to create a JIRA ticket. It could be shown from many places, from the header, to the context menu, to the list page. Traditionally, we had declared modal components with a JSX tag. But then the question became, “Where should we declare the tag?”
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The dialog is used to create a JIRA ticket. It could be shown from many places, from the header to the context menu, to the list page. Traditionally, we had declared modal components with a JSX tag. But then the question became, “Where should we declare the tag?”
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The most common option was to declare it wherever it was being used. But using modals in a declarative way is not only about a JSX tag, but also about maintaining the modal’s state like visibility, parameters in the container component. Declaring it everywehre means managing state everywhere. It's frustrating.
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The most common option was to declare it wherever it was being used. But using modals in a declarative way is not only about a JSX tag but also about maintaining the modal’s state like visibility, and parameters in the container component. Declaring it everywhere means managing the state everywhere. It's frustrating.
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The other option put it in the Root component, for example:
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Unfortunately, most examples of using modals just follow this practice, it causes such confusions when managing modals in React.
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I believe you must once encountered with the scenario that originally you only needed to show a modal when click a button, then when requirements changed, you need to open the same modal from a different place. Then you have to refactor your code to re-consider where to declare the modal. The root cause of such annoying things is just because we have not understood the essential of a modal.
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I believe you must once encountered with the scenario that originally you only needed to show a modal when you click a button, then when requirements changed, you need to open the same modal from a different place. Then you have to refactor your code to re-consider where to declare the modal. The root cause of such annoying things is just because we have not understood the essentials of a modal.
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# Rethink the Modal Usage Pattern in React
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According to the [wikipedia](https://en.wikipedia.org/wiki/Modal_window), a modal can be described as:
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According to the [Wikipedia](https://en.wikipedia.org/wiki/Modal_window), a modal can be described as:
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> A window that prevents the user from interacting with your application until he closes the window.
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From the definition we can get a conclusion: a modal is a global view that's not necessarily related with a specific context.
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From the definition, we can get a conclusion: a modal is a global view that's not necessarily related with a specific context.
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This is very similar with the page concept in a single page UI application. The visibility/ state of modals should be managed globally because, from the UI perspective, a modal could be showed above any page/component. The only difference between modal and page is: a modal allows you to not leave the current page to do some separate tasks.
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This is very similar with the page concept in a single page UI application. The visibility/ state of modals should be managed globally because, from the UI perspective, a modal could be shown above any page/component. The only difference between a modal and a page is: a modal allows you to not leave the current page to do some separate tasks.
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For pages management, we already have router framework like React Router, it helps to navigate to a page by URL. Actually, you can think URL a global id for a page. So, similarly, what if you assign a uniq id to a modal then show/hide it by the id? This is just how we designed NiceModal.
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However, besides using id, NiceModal allows to use the modal component directly to manage it.
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For pages management, we already have router framework like React Router, it helps to navigate to a page by URL. Actually, you can think of a URL as a global id for a page. So, similarly, what if you assign a unique id to a modal and then show/hide it by the id? This is just how we designed NiceModal.
With NiceModal you can create a separate modal component easily. It's just the same as you create a normal component but wrap it with high order compponent by `NiceModal.create`. For example, below code shows how to create a dialog with [Ant.Design](https://ant.design):
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With NiceModal you can create a separate modal component easily. It's just the same as creating a normal component but wrapping it with high order component by `NiceModal.create`. For example, the below code shows how to create a dialog with [Ant.Design](https://ant.design):
* The modal is uncontrolled. You can hide your modal inside the component regardless where it is showed.
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* The modal is uncontrolled. You can hide your modal inside the component regardless of where it is shown.
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* The high order component created by `NiceModal.create` ensures your component is not executed before it becomes visible.
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* You can call `modal.remove` to remove your modal component from the React component tree to reserve transitions.
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There are very flexible APIs for you to manage modals. See below for the introduction.
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### Embed your application with `NiceModal.Provider`:
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Since we will manage status of modals globally, the first thing is embedding your app with NiceModal provider, for example:
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Since we will manage the status of modals globally, the first thing is embedding your app with NiceModal provider, for example:
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```js
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importNiceModalfrom'@ebay/nice-modal-react';
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importNiceModalfrom'@ebay/nice-modal-react';
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importMyAntdModalfrom'./my-antd-modal'; // created by above code
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// If use by id, need to register the modal component.
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// If you use by id, you need to register the modal component.
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// Normally you create a modals.js file in your project
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// and register all modals there.
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NiceModal.register('my-antd-modal', MyAntdModal);
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NiceModal.register('my-antd-modal', MyAntdModal);
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//...
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// if use with id, need to register it first
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// if you use with id, you need to register it first
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constmodal=useModal('my-antd-modal');
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// or if with component, no need to register
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constmodal=useModal(MyAntdModal);
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}
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```
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With this approach, you can get the benifits:
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With this approach, you can get the benefits:
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* Inherit React context in the modal component under some component node.
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* Pass arguments to the modal component via props.
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> NOTE: if you show the component by id but the modal is not declared or registered. Nothing will happen but only a warning message in the dev console.
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> NOTE: If you attempt to show the component by ID but the modal is not declared or registered, nothing will happen except for a warning message in the dev console.
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### Using promise API
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Besides using props to interact with the modal from the parent component, you can do it easier by promise. For example, we have a user list page with a add user button to show a dialog to add user. After user is added the list should refresh itself to reflect the change, then we can use below code:
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Besides using props to interact with the modal from the parent component, you can do more easily by promise. For example, we have a user list page with an add user button to show a dialog to add user. After user is added the list should refresh itself to reflect the change, then we can use below code:
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```jsx
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NiceModal.show(AddUserModal)
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You can see the live example on codesandbox.
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### Integrating with Redux
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Though not necessary, you can integrate Redux to manage state of nice modals. Then you can use Redux dev tools to track/debug state change of modals. Here is how to do it:
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Though not necessary, you can integrate Redux to manage the state of nice modals. Then you can use Redux dev tools to track/debug state change of modals. Here is how to do it:
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```jsx
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// First combine the reducer
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```
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### Using with any UI library
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NiceModal provides lifecyle methods to manage the state of modals. You can use modal handler returned by `useModal` hook to bind any modallike component to the state. Below are typical state and methods you will use:
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NiceModal provides lifecycle methods to manage the state of modals. You can use modal handler returned by `useModal` hook to bind any modal-like component to the state. Below are typical states and methods you will use:
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***modal.visible**: the visibility of a modal.
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***modal.hide**: will hide the modal, that is, change `modal.visible` to false.
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***modal.remove**: remove the modal component from the tree so that you modal's code is not executed when it's invisible. Usually you call this method after the modal's transition.
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***modal.keepMounted** if you don't want to remove the modal from the tree for some instances, you can decide if call `modal.remove` based on value of `keepMounted`.
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****modal.visible**: the visibility of a modal.
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****modal.hide**: will hide the modal, that is, change `modal.visible` to false.
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****modal.remove**: remove the modal component from the tree so that your modal's code is not executed when it's invisible. Usually, you call this method after the modal's transition.
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****modal.keepMounted** if you don't want to remove the modal from the tree for some instances, you can decide if call `modal.remove` based on the value of `keepMounted`.
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Based on these properties/methods, you can easily use NiceModal with any modal-like component provided by any UI libraries.
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//...
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```
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It binds `visible` property to the `modal` handler, and use`modal.hide` to hide the modal when close button is clicked. And after the close transition it calls `modal.remove` to remove the modal from dom node.
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It binds `visible` property to the `modal` handler, and uses`modal.hide` to hide the modal when close button is clicked. And after the close transition it calls `modal.remove` to remove the modal from the dom node.
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For every modal implementation we always need to these binding manually. So, to make it easier to use we provides helper methods for 3 popular UI libraries Material UI, Ant.Design and Bootstrap React.
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For every modal implementation, we always need to do these bindings manually. So, to make it easier to use we provided helper methods for 3 popular UI libraries Material UI, Ant.Design and Bootstrap React.
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```jsx
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```
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These helpers will bind modal's common actions to correct properties of the component. However you can always override the property after the helpers property. For example:
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These helpers will bind modal's common actions to correct properties of the component. However, you can always override the property after the helper's property. For example:
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