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ant-design-vue/components/vc-tree/demo/animation.vue

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<script>
/* eslint no-console:0 */
import Tree, { TreeNode } from '../index';
import '../assets/index.less';
import cssAnimation from '../../_util/css-animation';
function animate (node, show, done) {
let height = node.offsetHeight;
return cssAnimation(node, 'collapse', {
start () {
if (!show) {
node.style.height = `${node.offsetHeight}px`;
} else {
height = node.offsetHeight;
node.style.height = 0;
}
},
active () {
node.style.height = `${show ? height : 0}px`;
},
end () {
node.style.height = '';
done();
},
});
}
const animation = {
enter (node, done) {
return animate(node, true, done);
},
leave (node, done) {
return animate(node, false, done);
},
};
export default {
render () {
return (
<div>
<h2>expanded</h2>
<Tree
defaultExpandAll={false}
defaultExpandedKeys={['p1']}
openAnimation={{ on: animation, props: { appear: true }}}
>
<TreeNode title='parent 1' key='p1'>
<TreeNode key='p10' title='leaf'/>
<TreeNode title='parent 1-1' key='p11'>
<TreeNode title='parent 2-1' key='p21'>
<TreeNode title='leaf'/>
<TreeNode title='leaf'/>
</TreeNode>
<TreeNode key='p22' title='leaf'/>
</TreeNode>
</TreeNode>
</Tree>
</div>
);
},
};
</script>
<style>
.collapse {
overflow: hidden;
display: block;
}
.collapse-active {
transition: height 0.3s ease-out;
}
</style>