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javascriptjslintradix

JSLint says "missing radix parameter"

I ran JSLint on this JavaScript code and it said:

Problem at line 32 character 30: Missing radix parameter.

This is the code in question:

imageIndex = parseInt(id.substring(id.length - 1))-1;

What is wrong here?

Solution

  • It always a good practice to pass radix with parseInt -

    parseInt(string, radix)

    For decimal -

    parseInt(id.substring(id.length - 1), 10)

    If the radix parameter is omitted, JavaScript assumes the following:

    • If the string begins with "0x", the radix is 16 (hexadecimal)
    • If the string begins with "0", the radix is 8 (octal). This feature is deprecated
    • If the string begins with any other value, the radix is 10 (decimal)

    (Reference)