Express-query-parser

A parser helps you parse request for your express server. You may usually encounter some req.query issues like parsing 'null', 'true' and any numbered string. This parser covert them to the right type.

scenarios

query with object

// GET http://localhost/?a=null&b=true&c[d]=false&c[e]=3.14

// without this parser
req.query = {a: 'null', b: 'true', c: {d: 'false', e: '3.14'}}

// with this parser
req.query = {a: null, b: true, c: {d: false, e: 3.14}}

query with array

// GET http://localhost/?a[]=null&a[]=false

// without this parser
req.query = {a: ['null', 'false']}

// with this parser
req.query = {a: [null, false]}

changelog

2022-05-31 (1.3.3): add empty string convert
2021-11-30 (1.3.2): add undefined convert
2021-10-12 (1.3.0): bump version, add number convert
2021-04-01 (1.2.0): bump version, only use esbuild and add type declarion
2020-10-26 (1.1.0): rewrite to typescript and rollup
2018-05-31 (1.0.2): support array
2018-05-29 (1.0.1): reduce size (177KB -> 17KB)
2018-05-17 (1.0.0): publish init version

feature

• [x] parse your query for null / boolean / undefined
• [x] support nested query
• [x] support array
• [x] support numbered string convert

install

# use yarn
yarn add express-query-parser

# use npm
npm i express-query-parser

usage

const { queryParser } = require('express-query-parser')
const express = require('express')
const app = express()

app.use(
  queryParser({
    parseNull: true,
    parseUndefined: true,
    parseBoolean: true,
    parseNumber: true
  })
)

options

field	desc	type	default
parseNull	convert all "null" to null	boolean	true
parseUndefined	convert all "undefined" to undefined	boolean	true
parseBoolean	convert all "true" to true and "false" to false	boolean	true
parseNumber	convert all numbered string to int and float	boolean	true

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Welcome any issues and PRs submit :D