无法对类型缺少调用或构造签名的表达式使用“ new” [英] Cannot use 'new' with an expression whose type lacks a call or construct signature

问题描述

如何获取停止在console.log中的错误？

How do I get the error to stop in my console.log?

不能将'new'用于缺少类型的表达式

Cannot use 'new' with an expression whose type lacks a call or construct signature.

var audioContext = new window.AudioContext();

唯一的方法是这样做吗？

Is the the only way to do it?

    var AudioContext = <any>window.AudioContext || <any>window.webkitAudioContext;
    var audioContext = new AudioContext();

推荐答案

默认情况下，未定义此类全局API在内置的打字稿 Window 界面中。但是您可以通过声明合并在窗口上对其进行缩放，如下所示：

By default these kind of global APIs aren't defined in the built-in typescript Window interface. But you can decalre it on the window through declaration merging like so:

declare namespace window {
    const AudioContext:{
        new():AudioContext;
    }
}

您应该可以正常使用它，例如：

you should then be able to use it normally like:

var audioContext = new window.AudioContext();

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