把手助手继承？

Question

Handlebars助手是否有可能从另一个Handlebars助手继承？例如：

Handlebars.registerHelper('DateHelper', function(date, format) {
    if (!date) return;
    var formatted = format;
    return new Handlebars.SafeString('<time>' + formatted + '</time>');
});

Handlebars.registerHelper('shortDate', function(date) {
    // I want to something like this..
    return Handlebars.helper.DateHelper(date, moment(value).format('D MMM YYYY'));
});

Answer 1

据我所知，不能直接从一个Handlebars助手继承到另一个Handlebars助手，但是可以使用普通的构造函数，例如：

var DateHelper = function HandlebarsDateHelper(date, format) {        
    return new Handlebars.SafeString('<time>' + format + '</time>');
};

Handlebars.registerHelper('shortDate', function(date) {
    if (!date) return;
    return new HandlebarsDateHelper(date, moment(value).format('D MMM YYYY'));
});