size
size:value
The field under validation must have a size matching the given value. For string data, value corresponds to the number of characters. For numeric data, value corresponds to a given integer value (the attribute must also have the numeric or integer rule). For an array, size corresponds to the count of the array. Let’s look at some examples:
let rules = {
// Validate that a string is exactly 12 characters long...
'title': 'size:12',
// Validate that a provided integer equals 10...
'seats' : 'integer|size:10',
// Validate that an array has exactly 5 items...
'tags': 'array|size:5',
}