[Bug Report] 当数据有四层且第四层为disabled时,tree的checkbox无法勾选
- Dominant language
- Vue
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Description
### Element UI version
2.15.10
### OS/Browsers version
谷歌浏览器
### Vue version
2.7.13
### Reproduction Link
https://codepen.io/ZSLGIT/pen/LYmvZBb
### Steps to reproduce
1. 基于element ui -> 组件 -> Tree树形控件 -> 禁用状态 -> 在线运行 代码
2. 更改js 部分data数据, data为四层tree,第四层tree为禁用状态, 其他层均不禁用
3. 此时,tree的checkbox 无法被点击选中
data = [{
id: 1,
label: '一级 2',
children: [{
id: 3,
label: '二级 2-1',
children: [{
id: 5,
label: '三级 3-1-2',
children: [{
id: 6,
label: '四级',
disabled: true
}]
}]
}]
}]
### What is Expected?
checkbox可以被选中
### What is actually happening?
checkbox无法被选中
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