requireContext

node中的实现类似require.context

install

``bash npm install --save require-context-async`

`options`

`javascript requireContext(directory, useSubdirectories = false, regExp = /\.js$/, fn);

directory {String} -读取文件的路径

useSubdirectories {Boolean} -是否遍历文件的子目录

regExp {RegExp} -匹配文件的正则

fn {Function} -执行每次迭代回调可选参数

`demo`

$3

 javascript
const router = require('express').Router();

router.param('id', function (req, res, next, candidate) {
    const validator =  !isNaN(parseFloat(candidate)) && isFinite(candidate);
    if (validator) {
        next()
    } else {
        res.sendStatus(403)
    }
})
router.route('/user/:id').get( function (req, res) {
    res.send('OK')
})

module.exports = router;`

`$3`

 javascript
const express = require('express');
const path = require('path');
const app = express();
const requireContext = require('require-context-async');
let files = requireContext(path.resolve(__dirname, './router'), false, /.js$/, (item) => {
    app.use(require(item));
});

console.log(files)``