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var currencyValidator = { | |
format: function (number) { | |
return (Math.trunc(number * 1000000000000) / 1000000000000).toFixed(2) | |
}, | |
parse: function (newString, oldNumber) { | |
var CleanParse = function (value) { | |
return { value: value } | |
} | |
var CurrencyWarning = function (warning, value) { | |
return { | |
warning: warning, | |
value: value, | |
attempt: newString | |
} | |
} | |
var NotAValidDollarAmountWarning = function (value) { | |
return new CurrencyWarning(newString + ' is not a valid dollar amount', value) | |
} | |
var AutomaticConversionWarning = function (value) { | |
return new CurrencyWarning(newString + ' was automatically converted to ' + value, value) | |
} | |
var newNumber = Number(newString) | |
var indexOfDot = newString.indexOf('.') | |
var indexOfE = newString.indexOf('e') | |
if (isNaN(newNumber)) { | |
if ( | |
indexOfDot === -1 && | |
indexOfE > 0 && | |
indexOfE === newString.length - 1 && | |
Number(newString.slice(0, indexOfE)) !== 0 | |
) { | |
return new CleanParse(oldNumber) | |
} else { | |
return new NotAValidDollarAmountWarning(oldNumber) | |
} | |
} | |
var newCurrencyString = currencyValidator.format(newNumber) | |
var newCurrencyNumber = Number(newCurrencyString) | |
if (newCurrencyNumber === newNumber) { | |
if (indexOfE !== -1 && indexOfE === newString.length - 2) { | |
return new AutomaticConversionWarning(newNumber) | |
} else { | |
return new CleanParse(newNumber) | |
} | |
} else { | |
return new NotAValidDollarAmountWarning( | |
newNumber > newCurrencyNumber | |
? newCurrencyNumber | |
: oldNumber | |
) | |
} | |
} | |
} |
is perfect and practical code, start it ~
i think adding annotation is a great idea! thanks ~
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In the interest of shameless self-promotion, I deal with some of those bugs at https://github.com/adamcarheden/html-form-tools. vue-compatible version coming soon (maybe).