npm包管理
安装模块
输入
$ npm install express
install 方式用来安装模块
-g 是全局安装, 不加安装在当前node_modules目录中
查询已安装的模块
输入
$ npm ls -g
卸载模块
$ npm uninstall express
更新模块
$ npm update express
搜索模块
$ npm search express
创建模块
- 输入
npm init
- 按提示
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults.
See `npm help json` for definitive documentation on these fields
and exactly what they do.
Use `npm install <pkg> --save` afterwards to install a package and
save it as a dependency in the package.json file.
Press ^C at any time to quit.
name: (02-npm) npm-module
version: (1.0.0) 1.0.0
description:
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to /Users/hans/Documents/project/JavaScriptCodes/nodejs-do/02-npm/package.json:
{
"name": "npm-module",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC"
}
Is this ok? (yes) yes
- 查看
package.json
{
"name": "npm-module",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC"
}
清空NPM本地缓存
$ npm cache clear
使用淘宝 NPM 镜像
安装 cnpm
$ npm install -g cnpm --registry=https://registry.npm.taobao.org
使用
$ cnpm install [name]
REPL 交互式命令行
表达式计算
> x = 7
7
> y = 10
10
> x + y
17
> var yy = _
undefined
> console.log(yy)
17
undefined
自动识别多行
> do {
... x++;
... console.log(x);
... }while(x < 20);
8
9
10
11
12
13
14
15
16
17
18
19
20
常用命令
ctrl + c - 退出当前终端。
ctrl + c 按下两次 - 退出 Node REPL。
ctrl + d - 退出 Node REPL.
向上/向下 键 - 查看输入的历史命令
tab 键 - 列出当前命令
.help - 列出使用命令
.break - 退出多行表达式
.clear - 退出多行表达式
.save filename - 保存当前的 Node REPL 会话到指定文件
.load filename - 载入当前 Node REPL 会话的文件内容。
代码
https://github.com/hans007/JavaScriptCodes/tree/master/nodejs-do
