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    This is an experimental technology, part of the ECMAScript 6 (Harmony) proposal.
    Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.


    The Number.parseInt() method parses a string argument and returns an integer of the specified radix or base.


    Number.parseInt(string[, radix])


    The value to parse. If string is not a string, then it is converted to one. Leading whitespace in the string is ignored.
    An integer between 2 and 36 that represents the radix (the base in mathematical numeral systems) of the above mentioned string. Specify 10 for the decimal numeral system commonly used by humans. Always specify this parameter to eliminate reader confusion and to guarantee predictable behavior. Different implementations produce different results when a radix is not specified.


    This method is completely the same function with the global parseInt() function:

    Number.parseInt === parseInt; // true

    and is part of ECMAScript 6 (its purpose is modularization of globals). Please see parseInt() for more details and examples.


    Number.parseInt = parseInt;


    Specification Status Comment

    ECMAScript 6 (ECMA-262)
    The definition of 'Number.parseInt' in that specification.

    Release Candidate Initial definition.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) 25 (25) Not supported (Yes) Not supported
    Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support Not supported 25 (25) Not supported Not supported Not supported

    See also

    Document Tags and Contributors

    Contributors to this page: Mingun, danielnixon, fscholz, ziyunfei, realityking, raztus
    Last updated by: ziyunfei,