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docs: image-viewer component support named slot viewer (#3357 )

2021-09-12 17:51:13 +08:00

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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 natif.

<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.

<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.

<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.

<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.

<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	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

ImageViewer Slots

Nom	Description
viewer	Contenu de la zone d'aperçu

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