javascript - 调用jsPDF的保存方法时获取TypeError Arg 1(Getting TypeError Arg 1 when calling save method of jsPDF)

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(The bounty expires in 6 days) . ((赏金将 在6天后失效) 。) Answers to this question are eligible for a +100 reputation bounty. (这个问题的答案有资格获得+100声望奖励。) Ricardo Sanchez wants to (draw more attention) to this question. (里卡多·桑切斯（Ricardo Sanchez）希望(引起更多)关于这个问题的(注意) 。)

I have a very simple implementation of jsPDF in a react project I'm currently working on.(在我目前正在从事的React项目中，我有一个非常简单的jsPDF实现。)

Just trying to run the sample 'hello world' code but the save method throws the following error:(只是尝试运行示例“ hello world”代码，但save方法会引发以下错误：)

My code is very simple, first, import the lib like this:(我的代码非常简单，首先，像这样导入lib：)

import jsPDF from 'jspdf';

Then on a click event function from a Component(然后从组件单击事件功能)

<IOControls exportDrawing={this.exportDrawing} />

I run:(我跑：)

exportDrawing() {
    const doc = new jsPDF();
    doc.text('Hello World!', 10, 10);
    console.log(doc); // shows an object
    doc.save('a4.pdf');
}

The above error triggers on save() but I have no idea what exactly is causing it.(上面的错误在save（）上触发，但我不知道到底是什么原因引起的。)

Any help will be much appreciated.(任何帮助都感激不尽。)

UPDATE I just noticed that if I call the methods at the root of my app component the code works fine, the problem ocurrs when it is called from within other components.(UPDATE我刚刚注意到，如果我在我的应用程序组件的根目录中调用方法，则代码可以正常工作，当从其他组件中调用它时，就会出现问题。)

Here is my setup(这是我的设置)

<App>
  <Sketch>
    <SketchControls>
    <IOControls>

exportDrawing() is declared in <Sketch> and the its triggered from a button in <IOControls>(在<Sketch>声明exportDrawing() ，并通过<IOControls>的按钮触发它)

  ask by Ricardo Sanchez translate from so

Answer 1

It turns out that there was a method form another library causing a scope issue.(事实证明，存在另一个库的方法导致范围问题。)

I'm using the paperjs library as my drawing engine.(我正在使用paperjs库作为绘图引擎。)

I called the paper.install(window) method that gives scope to the window DOM element.(我调用了paper.install（window）方法，该方法将范围赋予窗口DOM元素。) By removing this call jspdf works.(通过删除此调用， jspdf可以工作。)