listSize rule checks the length of an array. equalTo, lessThan, lessThanOrEqualTo, greaterThan, greaterThanOrEqualTo, notEqualTo parameters are used to make comparisons with given comparison values.
Asia
Europe
Validation Result: 
valid
validCurrent Rules
[
{
"path": "val",
"ruleSet": [
"required",
{
"rule": "listSize",
"equalTo": 3
}
],
"dependantPaths": [
"comparisonValue"
]
}
]