[Bug Report] el-date-picker
- Dominant language
- Vue
- Stars
- 54k
- Forks
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Description
### Element UI version
2.13.2
### OS/Browsers version
win10/Google Chrome 已是最新版本
版本 84.0.4147.105（正式版本） （64 位
### Vue version
2.6.10
### Reproduction Link
https://codepen.io/jinggege77/pen/mdVYvaB?editors=1000
### Steps to reproduce
使用value-format="yyyy 第 WW 周"，显示value1的值，控制台报错
[Vue warn]: Error in render: "TypeError: e.getMonth is not a function"
found in
---> at packages/date-picker/src/picker.vue
[Vue warn]: Error in render: "TypeError: t.getFullYear is not a function"
found in
---> at packages/date-picker/src/basic/year-table.vue
### What is Expected?
可以修复报错
### What is actually happening?
可以修复报错
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