javascript - angularjs1 上的 minFractionDigits 和 maxFractionDigits

Question

如何在 angularjs1 上使用 minFractionDigits 和 maxFractionDigits 过滤数字？

Angular2 的十进制管道过滤器为 described here .

number_expression | number[:digitInfo]

Formats a number as text. Group sizing and separator and other locale-specific configurations are based on the active locale.

where expression is a number:

• digitInfo is a string which has a following format: {minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}
• minIntegerDigits is the minimum number of integer digits to use. Defaults to 1.
• minFractionDigits is the minimum number of digits after fraction. Defaults to 0.
• maxFractionDigits is the maximum number of digits after fraction. Defaults to 3.

我想在 angularjs1 上做这个。 我该怎么做？

Answer 1

我根据@Claies 的建议创建了一个自定义过滤器，如下所示。

angular.module('MyApp', []).filter('numberMinMaxFractionSize',function () {
    return function (num, min, max) {
        if (typeof num === "number") {
            var options = {
                minimumFractionDigits: min,
                maximumFractionDigits: max,
            }
            return new Intl.NumberFormat(findLocale(), options).format(num);
        } else {
            return num;
        }
    };
});

function findLocale() {
    try {
        return (navigator.browserLanguage || navigator.language || navigator.userLanguage)
    } catch (e) {
        return "en-US";
    }
}

html:

<div>{{value |numberMinMaxFractionSize:0:2}}</div>