toNumberPreprocessor converts empty string to 0

javascript converts empty string to 0. So if the this preprocessor is applied for number and if input is empty string then after transformation we receive value 0 which is number and hence zod doesn't throw any error

console.log(+''); // 0

zod-extras/src/utils/toNumberPreprocessor.ts

Lines 6 to 8 in cbe209b

    
           if (typeof value === 'string' && !isNaN(+value)) { 
        
             return +value 
        
           }

Thank you for the report! This has been fixed and v2.0.0 has been released.

	if (typeof value === 'string' && !isNaN(+value)) {
	return +value
	}