我正在尝试将JavaScript文件移至Webpack。我对Webpack不太熟悉，因此不确定我是否正确编写了其中的任何代码。我正在尝试加载jquery-ui，popper和bootstrap4。但是，在需要public OptionalDouble computeMean(double[] grades) {
Objects.requireNonNull(grades);
if (grades.length == 0) {
return OptionalDouble.empty();
}
...
return OptionalDouble.of(result);
}
时出现错误。请注意，我将Wepacker gem用于Ruby on Rails。
我在我的environment.js文件中包含了以下代码，以在每个文件中自动包含jQuery。
Popper这部分有效。因此，我从那里开始了const { environment } = require('@rails/webpacker')
const webpack = require('webpack')
environment.plugins.append('Provide', new webpack.ProvidePlugin({
$: 'jquery',
jQuery: 'jquery'
}))
module.exports = environment
。
然后在我的/pack/application.js文件中加入yarn add jquery-ui。
从我的js文件中，以下代码将打印到我的控制台：
require('jquery-ui')此后，我尝试安装$(document).ready(function(){
if (jQuery.ui) {
console.log("loaded");
}
});
并要求使用popper。
然后从我的yarn add popper函数内部调用popper时出现错误：
document.ready错误：
$(document).ready(function(){
console.log(window.Popper)
});
这是我的pack / application.js文件
Uncaught Error: Module build failed (from ./node_modules/babel-loader/lib/index.js):
SyntaxError: /home/ubuntu/environment/node_modules/path-platform/path.js: 'return' outside of function (32:2)
30 | if (_path.posix) {
31 | module.exports = _path;
32 | return;
| ^
33 | }
34 |
35 | // resolves . and .. elements in a path array with directory names there
at Parser.raise (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:6420)
at Parser.parseReturnStatement
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10370)
at Parser.parseStatementContent
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10057)
at Parser.parseStatement (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10009)
at Parser.parseBlockOrModuleBlockBody
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10585)
at Parser.parseBlockBody (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10572)
at Parser.parseBlock (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10556)
at Parser.parseStatementContent
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10085)
at Parser.parseStatement (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10009)
at Parser.parseIfStatement
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10363)
at Parser.parseStatementContent
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10054)
at Parser.parseStatement (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10009)
at Parser.parseBlockOrModuleBlockBody
(home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10585)
at Parser.parseBlockBody (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:10572)
at Parser.parseTopLevel (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:9940)
at Parser.parse (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:11447)
at parse (home/ubuntu/environment/node_modules/@babel/parser/lib/index.js:11483)
at parser (home/ubuntu/environment/node_modules/@babel/core/lib/transformation/normalize-file.js:168)
at normalizeFile (home/ubuntu/environment/node_modules/@babel/core/lib/transformation/normalize-file.js:102)
at runSync (home/ubuntu/environment/node_modules/@babel/core/lib/transformation/index.js:44)
at runAsync (home/ubuntu/environment/node_modules/@babel/core/lib/transformation/index.js:35)
at process.nextTick (home/ubuntu/environment/node_modules/@babel/core/lib/transform.js:34)
at process._tickCallback (internal/process/next_tick.js:61)
at Object../node_modules/path-platform/path.js (index.js:82)
at __webpack_require__ (bootstrap:19)
at Object.<anonymous> (index.js:1)
at Object../node_modules/parents/index.js (index.js:39)
at __webpack_require__ (bootstrap:19)
at Object.<anonymous> (index.js:19)
at Object../node_modules/module-deps/index.js (index.js:623)
at __webpack_require__ (bootstrap:19)
at Object.<anonymous> (index.js:3)
at Object../node_modules/browserify/index.js (index.js:846)