ant-design/components/badge/demo/change.md

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---
order: 4
title:
zh-CN: 动态
en-US: Dynamic
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---
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## zh-CN
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展示动态变化的效果。
## en-US
The count will be animated as it changes.
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```jsx
use ant design icons 4.0 (#18217) * feat: use @ant-design/icons@4.0 * feat: use createFromIconfontCN to make site works * feat: update doc for Icon * feat: use icon in component Alert * feat: use icon in component Avatar * feat: use icon in component Breadcrumb * feat: use icon in component Button * feat: use icon in component Cascader * feat: use icon in component Collapse * feat: use icon in component Datepicker * feat: use icon in component Dropdown * feat: use icon in component Form * feat: use icon in component Input * feat: use icon in component InputNumber * feat: use icon in component Layout * feat: use icon in component Mention * feat: use icon in component Message * feat: use icon in component Modal * feat: use icon in component Notification * feat: use icon in component PageHeader * feat: use icon in component Pagination * feat: use icon in component Popconfirm * feat: use icon in component Progress * feat: use icon in component Rate * feat: use icon in component Result * feat: use icon in component Select * feat: use icon in component Step * feat: use icon in component Switch * feat: use icon in component Table * feat: use icon in component Tab * feat: use icon in component Tag * feat: handle rest component which using Icon * fix: remove unused vars * feat: use latest alpha ant design icons * fix: failed test in uploadlist.test.js * test: update snapshot for icons * doc: add Icon for site * doc: use @ant-design/icons in site * chore: use latest icons * fix: tslint issue * fix: test cases * fix: types for react * fix: lint rules for import orders * fix: use @ant-design/icons@4.0.0-alpha.5 to avoid insert css in server render * fix: eslint error in demo/**.md * inject antd icons * update snapshot * fix site * doc: update docs * fix: code snippets icon in site * feat: use latest @ant-design/icons * fix: icon props in message
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import { Badge, Button, Switch } from 'antd';
import { MinusOutlined, PlusOutlined, QuestionOutlined } from '@ant-design/icons';
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const ButtonGroup = Button.Group;
class Demo extends React.Component {
state = {
count: 5,
show: true,
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};
increase = () => {
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const count = this.state.count + 1;
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this.setState({ count });
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};
decline = () => {
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let count = this.state.count - 1;
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if (count < 0) {
count = 0;
}
this.setState({ count });
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};
random = () => {
const count = Math.floor(Math.random() * 100);
this.setState({ count });
};
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onChange = show => {
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this.setState({ show });
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};
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render() {
return (
<div>
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<div>
<Badge count={this.state.count}>
<a href="#" className="head-example" />
</Badge>
<ButtonGroup>
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<Button onClick={this.decline}>
<MinusOutlined />
</Button>
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<Button onClick={this.increase}>
<PlusOutlined />
</Button>
<Button onClick={this.random}>
<QuestionOutlined />
</Button>
</ButtonGroup>
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</div>
<div style={{ marginTop: 10 }}>
<Badge dot={this.state.show}>
<a href="#" className="head-example" />
</Badge>
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<Switch onChange={this.onChange} checked={this.state.show} />
</div>
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</div>
);
}
}
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ReactDOM.render(<Demo />, mountNode);
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```