tfn-validator/dist/tfn.min.js

Australian tax file number validator

var tfn;(function(tfn_1){var validator=function(){function validator(){this.eightDigitWeights=[10,7,8,4,6,3,5,1];this.nineDigitWeights=[10,7,8,4,6,3,5,2,1]}validator.prototype.isValid=function(tfn){if(!this.isValidLength(tfn)){return false}var weightedVal=this.weightedProduct(tfn);var remainder=weightedVal%11;return remainder===0};validator.prototype.isValidLength=function(tfn){var len=tfn.toString().length;return len<8||len>9?false:true};validator.prototype.weightedProduct=function(tfn){var numArray=this.numToArray(tfn);if(numArray.length<8||numArray.length>9){throw Error("Invalid input length")}var weights=numArray.length===8?this.eightDigitWeights:this.nineDigitWeights;var product=0;numArray.forEach(function(num,index){product+=num*weights[index]});return product};validator.prototype.numToArray=function(number){return number.toString(10).split("").map(function(digit){return parseInt(digit,10)})};return validator}();tfn_1.validator=validator})(tfn||(tfn={}));
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