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Update getCardSize docs (#566)

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Co-authored-by: Paulus Schoutsen <balloob@gmail.com>
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Bram Kragten 2020-06-01 20:45:41 +02:00 committed by GitHub
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docs/frontend/custom-ui/lovelace-custom-card.md
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@ -28,7 +28,7 @@ Home Assistant will set the `hass` property when the state of Home Assistant cha
element.hass = hass; element.hass = hass;
``` ```
Your card can define a `getCardSize` method that returns the size of your card as a number. A height of 1 is equivalent to 50 pixels. This will help Home Assistant distribute the cards evenly over the columns. A card size of `1` will be assumed if the method is not defined. Your card can define a `getCardSize` method that returns the size of your card as a number or a promise that will resolve to a number. A height of 1 is equivalent to 50 pixels. This will help Home Assistant distribute the cards evenly over the columns. A card size of `1` will be assumed if the method is not defined.
```js ```js
if ('getCardSize' in element) { if ('getCardSize' in element) {
@ -38,6 +38,14 @@ if ('getCardSize' in element) {
} }
``` ```
Since some element can be lazy loaded, if you want to get the card size of another element, you should first check it is defined.
```js
return customElements
.whenDefined(element.localName)
.then(() => element.getCardSize());
```
Your card can define a `getConfigElement` method that returns a custom element for editing the user configuration. Home Assistant will display this element in the card editor in Lovelace. Your card can define a `getConfigElement` method that returns a custom element for editing the user configuration. Home Assistant will display this element in the card editor in Lovelace.
## Defining your card ## Defining your card