parseInteger()

parseInteger(str, radix?): number

Parses a string into an integer of the specified radix.

DEPRECATED

Use parseInt() directly instead.

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Parameters

str: string | null | undefined

The string to parse.

radix?: number = 10

The radix (base) to use for parsing. Defaults to 10.

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Returns: number

The parsed integer, or NaN if parsing fails.

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See Also

• parseInt() - MDN
• Browser support - Can I Use

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Since

2.0.0

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Also known as

parseInt (Lodash, es-toolkit) · ❌ (Remeda, Radashi, Ramda, Effect, Modern Dash, Antfu)

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Example

// ❌ Deprecated approach
parseInteger('42');       // => 42
parseInteger('10', 2);    // => 2 (binary)
parseInteger('ff', 16);   // => 255 (hex)

// ✅ Recommended approach
parseInt('42', 10);       // => 42
parseInt('10', 2);        // => 2 (binary)
parseInt('ff', 16);       // => 255 (hex)

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How it works?

Parses string to integer with radix. Deprecated: Use parseInt() directly.

Native Equivalent

// ❌ parseInteger(str, 10)
// ✅ parseInt(str, 10)

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Use Cases

Parse integer 📌

Parse string to integer.

#parse#integer#number#string

parseInt('42', 10);  // 42

Convert user input

Parse form input to number.

#convert#input#form#number

const quantity = parseInt(input, 10) || 0;