日常平凡本身用的npm模块也不算少了,实在网上有许多牛人开辟的npm模块都很好,愿望不要被埋没了。
一、 有用的模块
1.thunder-vip
作用:猎取最新可用的迅雷 vip 账号。
处理什么:不必每次翻开网站去找号。。
用法: $ thunder
or
var thunderVip = require('thunder-vip');
thunderVip(function (err, accounts) {
console.log(accounts);
});
截图
2. npm-user-downloads
检察 npm 用户某个时间段内一切模块的下载量,按从高到低排名。
处理什么:起初是想看本身的那些模块下载量多,好重点保护。。
用法: $ nud hupengbest last-month --limit=20
截图:
二、koa开辟模块
1. co
作用:异步掌握
1 栗子
co(function* () {
var result = yield Promise.resolve(true);
return result;
}).then(function (value) {
console.log(value);
}, function (err) {
console.error(err.stack);
});
2 假如你想把一个 co-generator-function 转成实在的functionu并返回一个promise 能够运用co.wrap(fn*)
var fn = co.wrap(function* (val) {
return yield Promise.resolve(val);
});
fn(true).then(function (val) {
});
3 完全的example
var co = require('co');
co(function *(){
// yield any promise
var result = yield Promise.resolve(true);
}).catch(onerror);
co(function *(){
// resolve multiple promises in parallel
var a = Promise.resolve(1);
var b = Promise.resolve(2);
var c = Promise.resolve(3);
var res = yield [a, b, c];
console.log(res);
// => [1, 2, 3]
}).catch(onerror);
// errors can be try/catched
co(function *(){
try {
yield Promise.reject(new Error('boom'));
} catch (err) {
console.error(err.message); // "boom"
}
}).catch(onerror);
function onerror(err) {
// log any uncaught errors
// co will not throw any errors you do not handle!!!
// HANDLE ALL YOUR ERRORS!!!
console.error(err.stack);
}
4 api
co(fn*).then( val => )
处理一个generator然后返回一个promise
co(function* () {
return yield Promise.resolve(true);
}).then(function (val) {
console.log(val);
}, function (err) {
console.error(err.stack);
});
var fn = co.wrap(fn*)
将一个generator转成一般的function并返回一个promise
var fn = co.wrap(function* (val) {
return yield Promise.resolve(val);
});
fn(true).then(function (val) {
});
2、debug
npm install debug
运用方法
//Example app.js
var debug = require('debug')('http')
, http = require('http')
, name = 'My App';
// fake app
debug('booting %s', name);
http.createServer(function(req, res){
debug(req.method + ' ' + req.url);
res.end('hello\n');
}).listen(3000, function(){
debug('listening');
});
// fake worker of some kind
require('./worker');
//Example worker.js:
var debug = require('debug')('worker');
setInterval(function(){
debug('doing some work');
}, 1000);
效果图
在windows环境下须要设置环境变量set DEBUG=*,-not_this
我这里运用的是idea的debug调试
windows 下启动体式格局
将debug日记转存到文件中 DEBUG_FD=3 node your-app.js 3> whatever.log
3、koa-bodyparser
运用方法
var koa = require('koa');
var bodyParser = require('koa-bodyparser');
var app = koa();
app.use(bodyParser());
app.use(function *() {
this.body = this.request.body;
});
在koa2中运用
npm install koa-bodyparser@next --save
4. koa-json
npm install koa-json --save
运用方法
var json = require('koa-json');
var Koa = require('koa');
var app = new Koa();
app.use(json());
app.use((ctx) => {
ctx.body = { foo: 'bar' };
});
4. koa-webpack-dev-middleware
运用方法
npm install --save-dev koa-webpack-dev-middleware
var app = require('koa')();
var webpackMiddleware = require("koa-webpack-dev-middleware");
app.use(webpackMiddleware(webpack({
// webpack options
// webpackMiddleware takes a Compiler object as first parameter
// which is returned by webpack(...) without callback.
entry: "...",
output: {
path: "/"
// no real path is required, just pass "/"
// but it will work with other paths too.
}
}), {
// all options optional
noInfo: false,
// display no info to console (only warnings and errors)
quiet: false,
// display nothing to the console
lazy: true,
// switch into lazy mode
// that means no watching, but recompilation on every request
watchDelay: 300,
// delay after change (only lazy: false)
publicPath: "/assets/",
// public path to bind the middleware to
// use the same as in webpack
headers: { "X-Custom-Header": "yes" },
// custom headers
stats: {
colors: true
}
// options for formating the statistics
}));