Live Demo
为什么这个：
# Controller
$scope.price = -10;
# View
{{ price | currency }}
结果在($ 10.00)而不是 – $ 10.00？
这是代表负货币的流行方式。
Wikipedia：
原文链接：https://www.f2er.com/angularjs/145434.htmlIn bookkeeping,amounts owed are often represented by red numbers,or a number in parentheses,as an alternative notation to represent negative numbers.
你可以在Angular源代码中看到他们这样做(negSuf / negPre)：
function $LocaleProvider(){
this.$get = function() {
return {
id: 'en-us',NUMBER_FORMATS: {
DECIMAL_SEP: '.',GROUP_SEP: ',',PATTERNS: [
{ // Decimal Pattern
minInt: 1,minFrac: 0,maxFrac: 3,posPre: '',posSuf: '',negPre: '-',negSuf: '',gSize: 3,lgSize: 3
},{ //Currency Pattern
minInt: 1,minFrac: 2,maxFrac: 2,posPre: '\u00A4',negPre: '(\u00A4',negSuf: ')',lgSize: 3
}
],CURRENCY_SYM: '$'
},
