Simple is<Type> and assert<Type> predicates

npm install validate-type
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This provides a simple is<Type> and assert<Type> module for Node.js. Typically these are used as validators, either for parameter testing or in unit test code.


The usual, npm, add a dependency in your package.json to validate-type and run:

$ npm install


The module provides very basic isType and assertType functions for testing. All predicates return boolean values, all assertions either return nothing or throw an AssertionError.

var Validate = require('validate');

Validate.isInteger(0); // true
Validate.isString(0);  // false;

Validate.assertNumber(1/0); // nothing
Validate.assertArray('');   // Error

Currently the following types are supported:

  • NullOrUndefined
  • String
  • Number
  • Integer
  • Float
  • Boolean
  • Date
  • Array
  • Function



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