check

The check() function is the main API used for validating and sanitizing HTTP requests with express-validator. It gives you access to all of the built-in validators, sanitizers, and a bunch of other utility functions to shape the validation just the way you need.

check()

import{ check }from'express-validator';
check(fields?:string|string[], message?:any): ValidationChain

Parameters:

Name	Description
fields	One or more field names to select. If omitted, selects the whole request location.
message	Which error message to use when a validator doesn't specify one.

Creates a validation chain for one or more fields. Fields are selected from any of the following request locations:

• req.body
• req.cookies
• req.headers
• req.query
• req.params

If any of the fields is present in more than one location, then all instances of that field value are processed by the validation chain.

body()

import{ body }from'express-validator';
body(fields?:string|string[], message?:any): ValidationChain

Same as check(), but only checking req.body.

cookie()

import{ cookie }from'express-validator';
cookie(fields?:string|string[], message?:any): ValidationChain

Same as check(), but only checking req.cookies.

header()

import{ header }from'express-validator';
header(fields?:string|string[], message?:any): ValidationChain

Same as check(), but only checking req.headers.

param()

import{ param }from'express-validator';
param(fields?:string|string[], message?:any): ValidationChain

Same as check(), but only checking req.params.

query()

import{ query }from'express-validator';
query(fields?:string|string[], message?:any): ValidationChain

Same as check(), but only checking req.query.