Element: [Bug Report] Typescript 3.7 declaration conflicts

[ZanderOlidan]

Element UI version

2.10.1

OS/Browsers version

macOS Mojave

Vue version

2.6.10

### Reproduction Link
-

Steps to reproduce

Install Typescript 3.7. Run a project with element ui.

What is Expected?

To build properly

What is actually happening?

Running the dev environment breaks on Typescript 3.7 with the error below

ERROR in /Users/project/node_modules/element-ui/types/cascader.d.ts(3,10):
3:10 Import declaration conflicts with local declaration of 'CascaderOption'.
    1 | import { VNode } from 'vue';
    2 | import { ElementUIComponent, ElementUIComponentSize } from './component'
  > 3 | import { CascaderOption, CascaderProps, CascaderNode } from './cascader-panel';
      |          ^
    4 |
    5 | export type CascaderOption = CascaderOption
    6 |
ERROR in /Users/project/node_modules/element-ui/types/cascader.d.ts(3,26):
3:26 Import declaration conflicts with local declaration of 'CascaderProps'.
    1 | import { VNode } from 'vue';
    2 | import { ElementUIComponent, ElementUIComponentSize } from './component'
  > 3 | import { CascaderOption, CascaderProps, CascaderNode } from './cascader-panel';
      |                          ^
    4 |
    5 | export type CascaderOption = CascaderOption
    6 |
ERROR in /Users/project/node_modules/element-ui/types/cascader.d.ts(3,41):
3:41 Import declaration conflicts with local declaration of 'CascaderNode'.
    1 | import { VNode } from 'vue';
    2 | import { ElementUIComponent, ElementUIComponentSize } from './component'
  > 3 | import { CascaderOption, CascaderProps, CascaderNode } from './cascader-panel';
      |                                         ^
    4 |
    5 | export type CascaderOption = CascaderOption
    6 |

[smallp]

Same issue.

[loca-spirit]

希望尽快解决

[salvadordiaz]

This is already fixed in the dev branch, when can we expect a release ?

[wizardnet972]

also happens in version 2.12.0

[teo001]

@salvadordiaz I solved the problem with you solution:

`import { CascaderOption as CascaderOption2 , CascaderProps as CascaderProps2 , CascaderNode as CascaderNode} from './cascader-panel';

export type CascaderOption = CascaderOption2

export type CascaderProps = CascaderProps2

export type CascaderNode = CascaderNode2
`

Thank you very much!

[troy351]

It was fixed here https://github.com/ElemeFE/element/commit/d15b778826870954c7ae0afe54a707d97ae212e9
But no new release yet

[wizardnet972]

@troy351 so when please? it's a critical bug

[troy351]

I am also wondering

------------------ Original ------------------
From: Shlomi Levi <[email protected]>
Date: Fri,Nov 15,2019 9:53 PM
To: ElemeFE/element <[email protected]>
Cc: troy351 <[email protected]>, Mention <[email protected]>
Subject: Re: [ElemeFE/element] [Bug Report] Typescript 3.7 declaration conflicts (#17994)

[emretoprak]

i have same issue

[troy351]

@island205 @ziyoung Could you please publish a release for this bug now?

[lanten]

我几乎无法开始开发，为什么不发布？没人维护了吗

[eason-shsf]

我几乎无法开始开发，为什么不发布？没人维护了吗

you could downgrade typescript in your package.json to 3.5.3 until new elementui version released

[lanten]

我几乎无法开始开发，为什么不发布？没人维护了吗

you could downgrade typescript in your package.json to 3.5.3 until new elementui version released

thanks for your reply，I will try this

[cnjack]

change typescript version to 3.5.3 works for me, thx~~

wait for new elementui version released😆

[zhangporco]

将 typescript 降至3.5.3 确实可以解决，但是不完美啊 😂

[loca-spirit]

下个月能解决吗，或者先发个小版本，已经开始用3.7里面的构建特性了。

{
"extends": "./node_modules/loca-boot-common/lib/config/tsconfig.json",
"compilerOptions": {
"skipLibCheck": true,
"baseUrl": ".",
"rootDir": ".",
"rootDirs": [
"src",
"tests"
]
}
},
"references": [
{ "path": "packages/cmp-biz-core"},
{ "path": "packages/cmp-biz-common"},
{ "path": "packages/resourceComponent" },
{ "path": "packages/wscComponent" }
],
"include": [
"src//.ts",
"src//.tsx",
"src//.vue",
"tests//.ts"
],
"exclude": [
"node_modules/**",
]
}

目前暂时用skipLibCheck 解决了。如果没有packages子包会好解决一些，我项目里面很多packages子包，最后把整个项目也移动到了package里面，可以直接被引用了。
目前解决了我的问题。

[salvadordiaz]

I just forked the element repo and tagged a "release" of the v2.12.0 with the fix for typescript 3.7 compatibility cherry-picked from the current dev branch.
If you want to use it in your project while the element team cuts a true release. You can replace the element-ui dependency declaration in your package.json with

"element-ui":"https://github.com/hyperlex/element#v2.12.0-tsfix"

No support will be provided, use it only if your project must be compatible with typescript 3.7 and you absolutely cannot wait for the official release containing the fix.

[island205]

We will release version 2.13.0 to fix this problem at next Tuesday.

[lcoder]

问下发布了吗，在线等

[kelvinXueLei]

问下发布了吗，在线等

[cnjack]

问下发布了吗，在线等

[LLawlight]

We will release version 2.13.0 to fix this problem at next Tuesday.

哥，Tuesday了，请问今天几点会发呢

[island205]

Element 2.13.0 已发布