3 examples of 'yup number validation' in JavaScript

8
function validateNumber(num) {
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  num = (num + '').replace(/\s+|-/g, '');
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11
  if (!/^\d+$/.test(num)) {
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    return false;
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  }
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  var card = cardFromNumber(num);
16
17
  if (card) {
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    var cardNumbers = A(card.length);
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    return ( cardNumbers.includes(num.length)) && (card.luhn === false || luhnCheck(num));
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  }
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23
  return false;
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}

45
function verify(number) {
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  if (!_.isNumber(number)) {
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    throw new Error('Wrong log level specified!');
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  }
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  return number;
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}

149
validateNumber: function validateNumber(name) {
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  var opts = arguments[1] === undefined ? {} : arguments[1];
151
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  if (util.type(this[name]) === "number") {
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    if (opts.nonnegative && this[name] < 0) {
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      this.addError(name, "must not be negative");
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    }
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    if (opts.maximum && this[name] > opts.maximum) {
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      this.addError(name, "may not be greater than " + opts.maximum);
159
    }
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    if (opts.minimum && this[name] < opts.minimum) {
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      this.addError(name, "may not be less than " + opts.minimum);
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    }
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  } else if (!isBlank(this["" + name + "BeforeCoercion"])) {
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    this.addError(name, "is not a number");
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  }
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},