parseInt (Lodash Compatibility)

::: warning Use parseInt

This parseInt function works slowly due to additional function calls.

Use the faster and more modern native parseInt instead.

:::

Converts a string to an integer.

const result = parseInt(string, radix);

Usage

parseInt(string, radix?)

Use parseInt when you want to convert a string to an integer. You can specify a radix to interpret it in a different base.

import { parseInt } from 'es-toolkit/compat';

// Basic decimal parsing
parseInt('123');
// Returns: 123

parseInt('08');
// Returns: 8

// Automatic hexadecimal recognition
parseInt('0x20');
// Returns: 32

// Explicit radix specification
parseInt('08', 10);
// Returns: 8

parseInt('0x20', 16);
// Returns: 32

parseInt('1010', 2);
// Returns: 10

// Use in arrays
['6', '08', '10'].map(parseInt);
// Returns: [6, 8, 10]

Invalid format strings return NaN.

import { parseInt } from 'es-toolkit/compat';

parseInt('abc');
// Returns: NaN

parseInt('');
// Returns: NaN

parseInt('123abc');
// Returns: 123 (parses only the beginning)

Parameters

• string (string): The string to convert to an integer.
• radix (number, optional): The radix to use for conversion. Default is 0, which automatically determines based on string format.

Returns

(number): Returns the converted integer. Returns NaN if conversion is not possible.