A method to convert the argument to an integral numeric value. This method follows ECMAScript's specification for the 'ToInteger' abstract operation.

Currently, this module only supports the ES2017 (ES8) specification.

npm install es-abstract-to-integer

var toInteger = require('es-abstract-to-integer')

console.log(toInteger(-3.14))  // =>   -3
console.log(toInteger(3.14))   // =>    3
console.log(toInteger(42))     // =>   42
console.log(toInteger("9001")) // => 9001
console.log(toInteger(null))   // =>    0
console.log(toInteger(false))  // =>    0
console.log(toInteger(true))   // =>    1

console.log(toInteger("foo"))  // =>    0
console.log(toInteger({}))     // =>    0
console.log(toInteger([]))     // =>    0

var d = new Date(2015, 3, 14, 0, 0, 0, 0)
console.log(toInteger(d)) // => 1428984000000

• API
• ECMAScript Specification References

The abstract operation ToInteger converts argument to an integral numeric value.

A Number value is returned.

A TypeError exception may be thrown for arguments that are Symbols or Objects that lack a valueOf method or a toString method capable of returning a non-object value.

Type: *

The value to convert.

• es-abstract: a single library for multiple ECMAScript abstract operations.