BrowserslistError: Unknown browser query `w`. Maybe you are using old Browserslist or made typo in q

今天在运行angular 7程序的时候，遇见了上述的错误：

ERROR in ./src/styles.less
Module build failed (from ./node_modules/mini-css-extract-plugin/dist/loader.js):
ModuleBuildError: Module build failed (from ./node_modules/postcss-loader/src/index.js):
BrowserslistError: Unknown browser query `w`. Maybe you are using old Browserslist or made typo in query.
    at unknownQuery (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:137:10)
    at Function.select (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:879:15)
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:176:33
    at Array.reduce (<anonymous>)
    at resolve (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:158:18)
    at browserslist (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:278:16)
    at Browsers.parse (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/browsers.js:66:12)
    at new Browsers (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/browsers.js:48:26)
    at loadPrefixes (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/autoprefixer.js:85:20)
    at plugin (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/autoprefixer.js:96:20)
    at LazyResult.run (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:295:14)
    at LazyResult.asyncTick (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:208:26)
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:213:17
    at <anonymous>
    at runLoaders (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/webpack/lib/NormalModule.js:301:20)
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/loader-runner/lib/LoaderRunner.js:367:11
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/loader-runner/lib/LoaderRunner.js:233:18
    at context.callback (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
    at Promise.resolve.then.then.catch (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss-loader/src/index.js:208:9)
    at <anonymous>
ERROR in Module build failed (from ./node_modules/postcss-loader/src/index.js):
BrowserslistError: Unknown browser query `w`. Maybe you are using old Browserslist or made typo in query.
    at unknownQuery (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:137:10)
    at Function.select (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:879:15)
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:176:33
    at Array.reduce (<anonymous>)
    at resolve (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:158:18)
    at browserslist (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/browserslist/index.js:278:16)
    at Browsers.parse (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/browsers.js:66:12)
    at new Browsers (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/browsers.js:48:26)
    at loadPrefixes (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/autoprefixer.js:85:20)
    at plugin (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/@angular-devkit/build-angular/node_modules/autoprefixer/lib/autoprefixer.js:96:20)
    at LazyResult.run (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:295:14)
    at LazyResult.asyncTick (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:208:26)
    at LazyResult.asyncTick (/Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:221:14)
    at /Users/eric/IdeaProjects/EtCampusService/web/node_modules/postcss/lib/lazy-result.js:213:17
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)

然后找了好多都没找到，最后发现是是 browserslist多写了一个w符号，而没有注释，才引起了错误，修正后的文件为：

# This file is currently used by autoprefixer to adjust CSS to support the below specified browsers
# For additional information regarding the format and rule options, please see:
# https://github.com/browserslist/browserslist#queries
#
# For IE 9-11 support, please remove 'not' from the last line of the file and adjust as needed

> 0.5%
last 2 versions
Firefox ESR
not dead
not IE 9-11

平时粗心，后面就跟自己添堵啊。再运行ng serve后就没问题了。

BrowserslistError: Unknown browser query `w`. Maybe you are using old Browserslist or made typo in q

猜你喜欢