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npm run dev和npm run serve的是一个非常常见的需求。
npm实际上是nodejs官方提供的包管理平台,npm提供了一个命令行工具npm-cli,在我们使用npm这个命令时,我们实际是通过node运行一个名为npm-cli.js的脚本
在构建项目时,通过npm install命令,会在项目目录下生成一个名为node_modules的文件夹
在package.json文件中,有一个scripts的字段
// 运行npm run serve的scripts字段"scripts": {"serve": "vue-cli-service serve","build": "vue-cli-service build","lint": "vue-cli-service lint"},
//运行npm run dev的scripts字段
"scripts": {"dev": "vue-cli-service serve","build": "vue-cli-service build","lint": "vue-cli-service lint","webpack": "webpack --version"},
npm run serve的时候是运行vue-cli-service serv
node_modules文件夹的.bin文件
然不能直接运行vue-cli-service,但是我们在npm run的时候,会前往node_modules/.bin下找到vue-cli-service文件,然后将该文件作为脚本运行。
#!/bin/sh
basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")case `uname` in*CYGWIN*) basedir=`cygpath -w "$basedir"`;;
esacif [ -x "$basedir/node" ]; then"$basedir/node" "$basedir/../@vue/cli-service/bin/vue-cli-service.js" "$@"ret=$?
else node "$basedir/../@vue/cli-service/bin/vue-cli-service.js" "$@"ret=$?
fi
exit $ret
@IF EXIST "%~dp0\node.exe" ("%~dp0\node.exe" "%~dp0\..\@vue\cli-service\bin\vue-cli-service.js" %*
) ELSE (@SETLOCAL@SET PATHEXT=%PATHEXT:;.JS;=;%node "%~dp0\..\@vue\cli-service\bin\vue-cli-service.js" %*
)
[1]. https://juejin.cn/post/7139045537864482853
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