[英]React Typescript, Call a function from external script
In my react application, I fetch a custom javascript file from the server and append it as a script
tag to the body of document
. 在我的react应用程序中,我从服务器获取一个自定义javascript文件,并将其作为
script
标签附加到document
的正文中。
this newly added custom file contains a method called manipulator
. 这个新添加的自定义文件包含一个称为
manipulator
的方法。 Now in one of the components, I want to call that function. 现在,在其中一个组件中,我想调用该函数。 As I know the function should exist in the
window
global object. 据我所知,该函数应该存在于
window
全局对象中。
if(documnet.getElementById('customJsId')){ // check if the script tag exists in document
window.manipulator(); // which I get Property 'iframeManipulator' does not exist on type 'Window'.ts(2339)
}
But here I get the compiler error 但是这里我得到编译器错误
Property 'manipulator' does not exist on type 'Window'.ts(2339)
类型“ Window” .ts(2339)上不存在属性“ manipulator”
which is totally logical, but I did not find a way to create an extended interface for window
or any other way to tell the compiler that there is an optional function in window
called manipulator
. 这是完全合乎逻辑的,但是我没有找到一种为
window
创建扩展接口的方法,也没有找到任何其他方法来告诉编译器window
中有一个称为manipulator
的可选函数。
Any help is appreciated. 任何帮助表示赞赏。
----------Just in case--how the script is added to document--------------
loadProjectCustomJS() {
runInAction(async () => {
thisfetchProjectJs().then((doc) => {
const body: HTMLBodyElement = document.getElementsByTagName('body')[0];
const customjs: HTMLScriptElement = document.createElement('script');
customjs.type = 'text/javascript';
customjs.id = 'customJsId'
customjs.src = doc.get('resourceUrl');
body.appendChild(customjs);
});
});
}
You can add it to the Window
interface from inside a TypeScript module (ts or tsx) like this: 您可以从TypeScript模块(ts或tsx)内部将其添加到
Window
界面,如下所示:
declare global {
interface Window {
manipulator: () => void;
}
}
Or you can create a global global.d.ts
(name doesn't matter, only that it's inside your source directory), containing this: 或者,您可以创建一个包含以下内容的全局
global.d.ts
(名称无关紧要,只不过它位于源目录中):
declare interface Window {
manipulator: () => void;
}
Be aware that this makes the function available everywhere, also before the script is initialized. 请注意,这会使函数在任何地方都可用,甚至在脚本初始化之前。
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