Created
July 14, 2016 08:55
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Angular 1.x directive for handling number input
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angular | |
.module('angular-number-input', []) | |
.directive('number-input', NumberInput); | |
function NumberInput() { | |
return { | |
restrict: 'A', | |
require: 'ngModel', | |
link: function (scope, element, attrs, ngModel) { | |
scope.$watch(attrs.ngModel, watchValue); | |
function watchValue(newValue, oldValue) { | |
if (newValue === "" || newValue === oldValue) return; | |
var strValue = new String(newValue); | |
var parts = splitNumber(strValue); | |
if (!parts) return updateViewValue(oldValue || ''); | |
var value = [ | |
allowNegative() && parts[1], | |
parts[2], | |
allowDecimal() && parts[3], | |
allowDecimal() && parts[4] && trimDecimals(parts[4], parseInt(attrs.decimalUpto, 10)) | |
].filter(identity).join(''); | |
return strValue !== value && updateViewValue(value); | |
} | |
function identity(o) { return o } | |
function splitNumber(num) { return num.match(/^(-?)([0-9]+)?([,|\.])?([0-9]+)?$/) } | |
function allowNegative() { return attrs.allowNegative !== 'false' } | |
function allowDecimal() { return attrs.allowDecimal !== 'false' } | |
function trimDecimals(str, max) { return str.slice(0, max || str.length) } | |
function updateViewValue(value) { | |
ngModel.$setViewValue(value); | |
ngModel.$render(); | |
} | |
} | |
}; | |
} |
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