使用build --target lib --name libname [entry] 编译后文件不可用

[fengpeng]

Version

3.0.4

Reproduction link

https://github.com/ElemeFE/element

Node and OS info

Node 8.x / yarn v1.10.1/ Mac

Steps to reproduce

1. 随意新建( vue create )项目
2. 添加 --target lib --name 等等信息到package.json buidl命令, 添加main字段, 指定到 [libname].common.js
3. 编译之后link到某本地项目( 比如用 vue create 新建一个 ), 并添加
4. 运行项目

What is expected?

正常运行

What is actually happening?

pptest.common.js?c837:1 Uncaught TypeError: Cannot assign to read only property 'exports' of object '#'

---

应该是下面这段代码引起的错误, 切换到webpack 3版本似乎没有复现此问题.
// webpack_require.r = function(exports) {
// if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
// Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
// }
// Object.defineProperty(exports, '__esModule', { value: true });
// };

PS: 开始以为是commonjs的文件不被接受, 后来发现element-ui是这个格式且完全无压力, 遂追踪.

[fengpeng]

先关掉, 提个有例子的上来.

[mrodal]

Im having the same problem, but if I downgrade to webpack 3, I get more errors, so I think its not compatible with the latest vue-cli.

Please respond in english :E

[fengpeng]

@mrodal
I fixed the problem with webpack 4

resolve: { symlinks: false }

[mrodal]

Yeah, I opened another issue and got to the same solution: #2675
But thanks anyway!