# DEPRECATED

Use the `@anypoint-web-components/awc` module instead.

-----

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This mixin is a port of [iron-fit-behavior](https://github.com/PolymerElements/iron-fit-behavior) that works with LitElement.

`ArcFitMixin` fits an element in another element using `max-height` and `max-width`, and optionally centers it in the window or another element. The element will only be sized and/or positioned if it has not already been sized and/or positioned by CSS.

|CSS properties|Action|
|----------------------|---------------------------------------------------|
|`position` set|Element is not centered horizontally or vertically|
|`top` or `bottom` set|Element is not vertically centered|
|`left` or `right` set|Element is not horizontally centered|
|`max-height` set|Element respects `max-height`|
|`max-width` set|Element respects `max-width`|

`ArcFitMixin` can position an element into another element using `verticalAlign` and `horizontalAlign`. This will override the element's css position.

```html
<div class="container">
  <arc-fit-impl verticalalign="top" horizontalalign="auto">
    Positioned into the container
  </arc-fit-impl>
</div>
```

Use `noOverlap` to position the element around another element without overlapping it.

```html
<div class="container">
  <arc-fit-impl nooverlap verticalalign="auto" horizontalalign="auto">
    Positioned around the container
  </arc-fit-impl>
</div>
```

Use `horizontalOffset, verticalOffset` to offset the element from its
`positionTarget`; `ArcFitMixin` will collapse these in order to
keep the element within `fitInto` boundaries, while preserving the element's
CSS margin values.

```html
<div class="container">
  <arc-fit-impl verticalalign="top" verticaloffset="20">
    With vertical offset
  </arc-fit-impl>
</div>
```

## Deprecation notice

The following attributes are supported for compatibility with older and Polymer elements but eventually will be removed and replaced wit  the corresponding new attribute.

-   `sizing-target` > `sizingtarget`
-   `fit-into` > `fitinto`
-   `no-overlap` > `nooverlap`
-   `position-target` > `positiontarget`
-   `horizontal-align` > `horizontalalign`
-   `vertical-align` > `verticalalign`
-   `dynamic-align` > `dynamicalign`
-   `horizontal-offset` > `horizontaloffset`
-   `vertical-offset` > `verticaloffset`
-   `auto-fit-on-attach` > `autofitonattach`


## Installation

```bash
npm i @advanced-rest-client/arc-fit-mixin
```

## Usage

```javascript
import { LitElement } from 'lit-element';
import { ArcFitMixin } from '@advanced-rest-client/arc-fit-mixin';

class ArcFitImpl extends ArcFitMixin(LitElement) {
  static get properties() {
    return {
      myProp: { type: Object, attribute: 'my-prop' },
    };
  }
}
```

## Testing

```bash
npm run test
```

## Testing with Sauce Labs

```bash
npm run test:sl
```

## Demo

```bash
npm start
```