How to use the isAfter function from validator

StringStrategy.js

GitHub: maanyakaran/core

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this.equals = (comparison) => (subject) => {
    return StringValidator.equals(subject, comparison) ? null : 'Does not equal ' + comparison;
}

this.isAfter = (date) => (subject) => {
    return StringValidator.isAfter(subject, date) ? null: subject + ' is not after ' + date;
}

this.isAlpha = (subject) => {
    return StringValidator.isAlpha(subject) ? null:  subject + ' is not alpha';

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validation.js

GitHub: rappopo/dab

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    return false
  }
}

validator.isAfter = function (value, dt, format) {
  if (!dt) return validatorJs.isAfter(value)
  let m = _.isEmpty(format) ? moment(dt) : moment(dt, format)
  if (!m.isValid()) return false
  return validatorJs.isAfter(value, m.toDate())
}

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express-validator2.js

GitHub: yinhaixiang/express-validator2

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  }
  return true;
},
isAfter: function(rule, value) {
  if (rule) {
    return validator.isAfter(value);
  }
  return true;
},
isBefore: function(rule, value) {

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+ 5 other calls in file

validators.js

GitHub: mmerkes/express-route-validator

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contains: validator.contains,
// equals(str, comparison) - check if the string matches the comparison.
equals: validator.equals,
// isAfter(str [, date]) - check if the string is a date that's after the specified date (defaults to now).
isAfter: function (str, date) {
  return validator.isAfter(str, typeof date !== 'boolean' ? date : undefined);
},
// isAlpha(str) - check if the string contains only letters (a-zA-Z).
isAlpha: validator.isAlpha,
// isAlphanumeric(str) - check if the string contains only letters and numbers.

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+ 17 other calls in file