使用var args的Typescript 0.9.5编译失败 [英] Typescript 0.9.5 compilation with var args fails

问题描述

所以我试图在我们的项目中升级到打字稿0.9.5，但是我目前卡住了.

So im trying to upgrade to typescript 0.9.5 in our project, but im currently stuck.

这是从编译器接收到的错误:

This is the error im reciving from the compiler:

error TS2082: Supplied parameters do not match any signature of call target:
Call signatures of types '(event: JQueryEventObject, component: any,
     mouseClickPagePosition: any) => void' and 
    '(eventObject: JQueryEventObject, ...args: any[]) => any' are incompatible:
                Call signature expects 1 or fewer parameters.

似乎是这样的代码:

jQuery('selector').on('event',
            (event, component, mouseClickPagePosition) => {
              // code
            });

不能与此jQuery定义一起使用:

cannot be used with this jQuery definition:

on(events: string, handler: (eventObject: JQueryEventObject, ...args: any[]) => any): JQuery;

但是方法签名似乎加起来了?

But the method signatures seems to add up?

推荐答案

此代码

jQuery('selector').on('event',
            (event, component, mouseClickPagePosition) => {
              // code
            });

应这样写:

jQuery('selector').on('event',
            (event, component?, mouseClickPagePosition?) => {
              // code
            });

on上的回调函数指定将使用至少一个参数调用它，并且可能更多.回调提供了必需三个参数，因此被视为错误.

The callback on on specifies that it will be called with at least one parameter, and possibly more. The callback provided required three parameters, so it's considered an error.

仅在0.9.5之前意外地允许使用此代码，但鉴于这是多么令人讨厌/不直观，将其视为允许必需"这些参数而不是可选参数的设计更改.

This code was only accidently allowed pre-0.9.5, but given how annoying/unintuitive this is, it's being considered as a design change to allow these parameters to be 'required' instead of optional.

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