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210 lines
6.3 KiB
Markdown
210 lines
6.3 KiB
Markdown
## Loading
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Show animation while loading data.
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### Loading inside a container
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Displays animation in a container (such as a table) while loading data.
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:::demo Element Plus provides two ways to invoke Loading: directive and service. For the custom directive `v-loading`, you just need to bind a `boolean` value to it. By default, the loading mask will append to the element where the directive is used. Adding the `body` modifier makes the mask append to the body element.
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```html
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<template>
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<el-table
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v-loading="loading"
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:data="tableData"
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style="width: 100%">
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<el-table-column
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prop="date"
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label="Date"
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width="180">
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</el-table-column>
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<el-table-column
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prop="name"
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label="Name"
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width="180">
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</el-table-column>
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<el-table-column
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prop="address"
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label="Address">
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</el-table-column>
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</el-table>
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</template>
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<style>
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body {
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margin: 0;
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}
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</style>
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<script>
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export default {
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data() {
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return {
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tableData: [{
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date: '2016-05-02',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}, {
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date: '2016-05-04',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}, {
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date: '2016-05-01',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}],
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loading: true
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};
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}
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};
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</script>
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```
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:::
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### Customization
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You can customize loading text, loading spinner and background color.
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:::demo Add attribute `element-loading-text` to the element on which `v-loading` is bound, and its value will be displayed under the spinner. Similarly, `element-loading-spinner` and `element-loading-background` are for customizing loading spinner class name and background color.
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```html
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<template>
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<el-table
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v-loading="loading"
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element-loading-text="Loading..."
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element-loading-spinner="el-icon-loading"
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element-loading-background="rgba(0, 0, 0, 0.8)"
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:data="tableData"
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style="width: 100%">
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<el-table-column
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prop="date"
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label="Date"
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width="180">
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</el-table-column>
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<el-table-column
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prop="name"
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label="Name"
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width="180">
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</el-table-column>
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<el-table-column
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prop="address"
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label="Address">
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</el-table-column>
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</el-table>
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</template>
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<script>
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export default {
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data() {
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return {
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tableData: [{
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date: '2016-05-02',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}, {
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date: '2016-05-04',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}, {
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date: '2016-05-01',
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name: 'John Smith',
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address: 'No.1518, Jinshajiang Road, Putuo District'
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}],
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loading: true
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};
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}
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};
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</script>
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```
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:::
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### Full screen loading
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Show a full screen animation while loading data.
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:::demo When used as a directive, a full screen Loading requires the `fullscreen` modifier, and it will be appended to body. In this case, if you wish to disable scrolling on body, you can add another modifier `lock`. When used as a service, Loading will be full screen by default.
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```html
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<template>
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<el-button
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type="primary"
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@click="openFullScreen1"
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v-loading.fullscreen.lock="fullscreenLoading">
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As a directive
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</el-button>
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<el-button
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type="primary"
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@click="openFullScreen2">
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As a service
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</el-button>
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</template>
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<script>
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export default {
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data() {
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return {
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fullscreenLoading: false
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}
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},
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methods: {
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openFullScreen1() {
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this.fullscreenLoading = true;
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setTimeout(() => {
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this.fullscreenLoading = false;
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}, 2000);
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},
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openFullScreen2() {
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const loading = this.$loading({
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lock: true,
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text: 'Loading',
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spinner: 'el-icon-loading',
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background: 'rgba(0, 0, 0, 0.7)'
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});
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setTimeout(() => {
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loading.close();
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}, 2000);
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}
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}
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}
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</script>
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```
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:::
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### Service
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You can also invoke Loading with a service. Import Loading service:
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```javascript
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import { ElLoading } from 'element-plus';
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```
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Invoke it:
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```javascript
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ElLoading.service(options);
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```
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The parameter `options` is the configuration of Loading, and its details can be found in the following table. `LoadingService` returns a Loading instance, and you can close it by invoking its `close` method:
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```javascript
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let loadingInstance = ElLoading.service(options);
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this.$nextTick(() => { // Loading should be closed asynchronously
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loadingInstance.close();
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});
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```
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Note that in this case the full screen Loading is singleton. If a new full screen Loading is invoked before an existing one is closed, the existing full screen Loading instance will be returned instead of actually creating another Loading instance:
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```javascript
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let loadingInstance1 = ElLoading.service({ fullscreen: true });
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let loadingInstance2 = ElLoading.service({ fullscreen: true });
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console.log(loadingInstance1 === loadingInstance2); // true
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```
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Calling the `close` method on any one of them can close this full screen Loading.
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If Element Plus is imported entirely, a globally method `$loading` will be registered to `app.config.globalProperties`. You can invoke it like this: `this.$loading(options)`, and it also returns a Loading instance.
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### Options
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| Attribute | Description | Type | Accepted Values | Default |
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|---------- |-------------- |---------- |-------------------------------- |-------- |
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| target | the DOM node Loading needs to cover. Accepts a DOM object or a string. If it's a string, it will be passed to `document.querySelector` to get the corresponding DOM node | object/string | — | document.body |
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| body | same as the `body` modifier of `v-loading` | boolean | — | false |
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| fullscreen | same as the `fullscreen` modifier of `v-loading` | boolean | — | true |
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| lock | same as the `lock` modifier of `v-loading` | boolean | — | false |
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| text | loading text that displays under the spinner | string | — | — |
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| spinner | class name of the custom spinner | string | — | — |
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| background | background color of the mask | string | — | — |
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| customClass | custom class name for Loading | string | — | — |
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