## Image

En plus des propriétés natives de img, ce composant supporte le lazy loading, les placeholder personnalisés, les échecs de téléchargement, etc.

### Usage basique

:::demo Indique comment l'image devrait être redimmensionnée pour s'adapter à son conteneur grâce à `fit`, identique au [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit) natif.

```html
<div class="demo-image">
  <div class="block" v-for="fit in fits" :key="fit">
    <span class="demonstration">{{ fit }}</span>
    <el-image
      style="width: 100px; height: 100px"
      :src="url"
      :fit="fit"
    ></el-image>
  </div>
</div>

<script>
  export default {
    data() {
      return {
        fits: ['fill', 'contain', 'cover', 'none', 'scale-down'],
        url: 'https://fuss10.elemecdn.com/e/5d/4a731a90594a4af544c0c25941171jpeg.jpeg',
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, reactive, toRefs } from 'vue';

  export default defineComponent({
    setup() {
      const state = reactive({
        fits: ['fill', 'contain', 'cover', 'none', 'scale-down'],
        url: 'https://fuss10.elemecdn.com/e/5d/4a731a90594a4af544c0c25941171jpeg.jpeg'
      });

      return {
        ...toRefs(state),
      };
    },
  });
</setup>
-->
```

:::

### Placeholder

:::demo Placeholder personnalisé qui s'affiche lorsque l'image n'est pas encore chargée, grâce à `slot = placeholder`.

```html
<div class="demo-image__placeholder">
  <div class="block">
    <span class="demonstration">Défaut</span>
    <el-image :src="src"></el-image>
  </div>
  <div class="block">
    <span class="demonstration">Personnalisé</span>
    <el-image :src="src">
      <template #placeholder>
        <div class="image-slot">Chargement<span class="dot">...</span></div>
      </template>
    </el-image>
  </div>
</div>

<script>
  export default {
    data() {
      return {
        src: 'https://cube.elemecdn.com/6/94/4d3ea53c084bad6931a56d5158a48jpeg.jpeg',
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const src = ref('https://cube.elemecdn.com/6/94/4d3ea53c084bad6931a56d5158a48jpeg.jpeg');

      return {
        src,
      };
    },
  });

</setup>
-->
```

:::

### Échec du chargement

:::demo Contenu personnalisé qui s'affiche lorsque le chargement a échoué, grâce à `slot = error`.

```html
<div class="demo-image__error">
  <div class="block">
    <span class="demonstration">Défaut</span>
    <el-image></el-image>
  </div>
  <div class="block">
    <span class="demonstration">Personnalisé</span>
    <el-image>
      <template #error>
        <div class="image-slot">
          <i class="el-icon-picture-outline"></i>
        </div>
      </template>
    </el-image>
  </div>
</div>
```

:::

### Lazy Loading

:::demo Utilisez le lazy loading avec `lazy = true`. Les images ne se chargeront que lorsque le scrolling les atteindra. Vous pouvez indiquer le conteneur grâce à `scroll-container`. Si undefined, ce sera le conteneur parent le plus proche avec la propriété overflow à auto ou scroll.

```html
<div class="demo-image__lazy">
  <el-image v-for="url in urls" :key="url" :src="url" lazy></el-image>
</div>

<script>
  export default {
    data() {
      return {
        urls: [
          'https://fuss10.elemecdn.com/a/3f/3302e58f9a181d2509f3dc0fa68b0jpeg.jpeg',
          'https://fuss10.elemecdn.com/1/34/19aa98b1fcb2781c4fba33d850549jpeg.jpeg',
          'https://fuss10.elemecdn.com/0/6f/e35ff375812e6b0020b6b4e8f9583jpeg.jpeg',
          'https://fuss10.elemecdn.com/9/bb/e27858e973f5d7d3904835f46abbdjpeg.jpeg',
          'https://fuss10.elemecdn.com/d/e6/c4d93a3805b3ce3f323f7974e6f78jpeg.jpeg',
          'https://fuss10.elemecdn.com/3/28/bbf893f792f03a54408b3b7a7ebf0jpeg.jpeg',
          'https://fuss10.elemecdn.com/2/11/6535bcfb26e4c79b48ddde44f4b6fjpeg.jpeg',
        ],
      }
    },
  }
</script>
<!--
<setup>
  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const urls = ref([
        'https://fuss10.elemecdn.com/a/3f/3302e58f9a181d2509f3dc0fa68b0jpeg.jpeg',
        'https://fuss10.elemecdn.com/1/34/19aa98b1fcb2781c4fba33d850549jpeg.jpeg',
        'https://fuss10.elemecdn.com/0/6f/e35ff375812e6b0020b6b4e8f9583jpeg.jpeg',
        'https://fuss10.elemecdn.com/9/bb/e27858e973f5d7d3904835f46abbdjpeg.jpeg',
        'https://fuss10.elemecdn.com/d/e6/c4d93a3805b3ce3f323f7974e6f78jpeg.jpeg',
        'https://fuss10.elemecdn.com/3/28/bbf893f792f03a54408b3b7a7ebf0jpeg.jpeg',
        'https://fuss10.elemecdn.com/2/11/6535bcfb26e4c79b48ddde44f4b6fjpeg.jpeg',
      ]);

      return {
        urls,
      };
    },
  });

</setup>
-->
```

:::

### Image Preview

:::demo allow big image preview by setting `previewSrcList` prop.

```html
<div class="demo-image__preview">
  <el-image
    style="width: 100px; height: 100px"
    :src="url"
    :preview-src-list="srcList"
  >
  </el-image>
</div>

<script>
  export default {
    data() {
      return {
        url: 'https://fuss10.elemecdn.com/e/5d/4a731a90594a4af544c0c25941171jpeg.jpeg',
        srcList: [
          'https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg',
          'https://fuss10.elemecdn.com/1/8e/aeffeb4de74e2fde4bd74fc7b4486jpeg.jpeg',
        ],
      }
    },
  }
</script>
<!--
<setup>

  import { defineComponent, ref } from 'vue';

  export default defineComponent({
    setup() {
      const url = ref('https://fuss10.elemecdn.com/e/5d/4a731a90594a4af544c0c25941171jpeg.jpeg');
      const srcList = ref([
        'https://fuss10.elemecdn.com/8/27/f01c15bb73e1ef3793e64e6b7bbccjpeg.jpeg',
        'https://fuss10.elemecdn.com/1/8e/aeffeb4de74e2fde4bd74fc7b4486jpeg.jpeg',
      ]);

      return {
        url,
        srcList,
      };
    },
  });

</setup>
-->
```

:::

### Image Attributs

| Attribut                                | Description                                                                                                                                                                | Type                 | Valeurs acceptées                          | Défaut                                                                          |
| --------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------- | ------------------------------------------ | ------------------------------------------------------------------------------- |
| alt                                     | Attribut alt natif.                                                                                                                                                        | string               | -                                          | -                                                                               |
| fit                                     | Indique comment l'image devrait être redimmensionnée pour s'adapter à son conteneur, identique à [object-fit](https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit) | string               | fill / contain / cover / none / scale-down | -                                                                               |
| hide-on-click-modal (needs translation) | When enabling preview, use this flag to control whether clicking on backdrop can exit preview mode                                                                         | boolean              | true / false                               | false                                                                           |
| lazy                                    | Si le lazy loading doit être utilisé.                                                                                                                                      | boolean              | —                                          | false                                                                           |
| preview-src-list                        | allow big image preview                                                                                                                                                    | Array                | —                                          | -                                                                               |
| referrer-policy                         | Attribut referrerPolicy natif.                                                                                                                                             | string               | -                                          | -                                                                               |
| src                                     | Source de l'image, identique au natif.                                                                                                                                     | string               | —                                          | -                                                                               |
| scroll-container                        | Le conteneur auquel ajouter le listener du scroll en mode lazy loading.                                                                                                    | string / HTMLElement | —                                          | Le conteneur parent le plus proche avec la propriété overflow à auto ou scroll. |
| z-index                                 | set image preview z-index                                                                                                                                                  | Number               | —                                          | 2000                                                                            |
| append-to-body                          | whether to append image itself to body. A nested parent element attribute transform should have this attribute set to `true`                                               | boolean              | —                                          | false                                                                           |

### Image Évènements

| Nom   | Description               | Paramètres |
| ----- | ------------------------- | ---------- |
| load  | Identique au load natif.  | (e: Event) |
| error | Identique au error natif. | (e: Error) |

### Image Slots

| Nom         | Description                                           |
| ----------- | ----------------------------------------------------- |
| placeholder | Se déclenche quand l'image charge.                    |
| error       | Se déclenche quand le chargement de l'image a échoué. |

### ImageViewer Attributs

| Attribute           | Description                                                                     | Type            | Acceptable Value    | Default |
| ------------------- | ------------------------------------------------------------------------------- | --------------- | ------------------- | ------- |
| url-list            | Preview link list                                                               | Array\<string\> | -                   | []      |
| z-index             | Preview backdrop z-index                                                        | number / string | int / string\<int\> | 2000    |
| initial-index       | The initial preview image index, less than or equal to the length of `url-list` | number          | int                 | 0       |
| infinite            | Whether preview is infinite                                                     | boolean         | true / false        | true    |
| hide-on-click-modal | Whether user can emit close event when clicking backdrop                        | boolean         | true / false        | false   |

### ImageViewer Évènements

| Event name | Description                                                                                    | Callback parameter                     |
| ---------- | ---------------------------------------------------------------------------------------------- | -------------------------------------- |
| close      | Emitted when clicking on `X` button or when `hide-on-click-modal` enabled clicking on backdrop | None                                   |
| switch     | When switching images                                                                          | `(val: number)` switching target index |