当从属关系中需要时,Lodash意外地将自身注入到全局中 [英] Lodash unexpectedly injects itself into global when required in subdependency
问题描述
我的应用程序依赖于库foolib
,库foolib
依赖于lodash,并需要通过var _ = require('lodash')
My app depends on a library foolib
, library foolib
has a dependency on lodash and requires it via var _ = require('lodash')
需要foolib
会导致lodash将其自身附加到窗口上
Requiring foolib
results in lodash attaching itself to the window
我发现这是由于以下原因造成的:
I found that this was due to this:
// Some AMD build optimizers, like r.js, check for condition patterns like:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
// Expose Lodash on the global object to prevent errors when Lodash is
// loaded by a script tag in the presence of an AMD loader.
// See http://requirejs.org/docs/errors.html#mismatch for more details.
// Use `_.noConflict` to remove Lodash from the global object.
root._ = _;
将调试器添加到条件主体中会触发调试器,但是导致进入if分支的条件现在返回false
Adding a debugger into the body of conditional results in the debugger triggering, but the condition that caused the if branch to be entered into now returns false
在调试器中添加控制台日志以注销define
的值,表明它是由webpack:///(webpack)/buildin/amd-define.js?0bba
定义的,其内容为
Adding a console log before the debugger to log out the value of define
shows it as being defined by webpack:///(webpack)/buildin/amd-define.js?0bba
with the contents of
module.exports = function() { throw new Error("define cannot be used indirect"); };
/*****************
** WEBPACK FOOTER
** (webpack)/buildin/amd-define.js
** module id = 875
** module chunks = 2
**/
自从我使用webpack进行构建以来,使用define
和define.amd
的条件似乎是真的
Since I'm building with webpack, it seems unexpected that that condition with define
and define.amd
would be true
推荐答案
找到了解决方案:
https://github.com/webpack/webpack/webpack/issues/138#issuecomment-160638284
Found a solution:
https://github.com/webpack/webpack/issues/138#issuecomment-160638284
module: {
noParse: /node_modules\/lodash\/lodash\.js/,
}
将其添加到webpack配置中,问题已解决
Added that to webpack config and problem was solved
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