UnhandledPromiseRejectionWarning vue项目打包时出现的问题

Question

building for production...Error processing file: static/css/app.6ce129ef56d2e457e48ece73e5051094.css
(node:39068) UnhandledPromiseRejectionWarning: Error: Expected a pseudo-class or pseudo-element.
at D:\vue\sell\static\css\app.6ce129ef56d2e457e48ece73e5051094.css:1697:1
at Root._error (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:137:24)
at Root.error (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\selectors\root.js:43:25)
at Parser.error (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:392:25)
at Parser.expected (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:685:25)
at Parser.pseudo (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:500:25)
at Parser.parse (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:649:22)
at Parser.loop (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:618:18)
at new Parser (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\parser.js:129:14)
at Processor._root (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\processor.js:47:22)
at Processor._runSync (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\processor.js:83:25)
at Processor.processSync (D:\vue\sell\node_modules_postcss-selector-parser@3.1.2@postcss-selector-parser\dist\processor.js:177:27)
at getParsed (D:\vue\sell\node_modules_postcss-minify-selectors@4.0.2@postcss-minify-selectors\dist\index.js:34:59)
at D:\vue\sell\node_modules_postcss-minify-selectors@4.0.2@postcss-minify-selectors\dist\index.js:196:39
at D:\vue\sell\node_modules_postcss@7.0.27@postcss\lib\container.js:239:18
at D:\vue\sell\node_modules_postcss@7.0.27@postcss\lib\container.js:135:18
at Root.each (D:\vue\sell\node_modules_postcss@7.0.27@postcss\lib\container.js:101:16)
(node:39068) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:39068) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

请问各位大神们该如何解决

Answer 1

警告:未经处理的承诺拒绝。此错误的起因可能是抛出了一个没有catch块的异步函数，也可能是拒绝了一个未使用.catch()处理的承诺。(拒绝id: 1)
(节点:39068)[DEP0018]拒绝警告:拒绝未处理的承诺。将来，未处理的承诺拒绝将使用非零退出码终止Node.js进程。