javascript - How to use cordova-plugin-whitelist plug-in?

I used cordova ionic to develop an ios app, but when I tested the app on the web page to access data, a cross-domain problem occurred, resulting in the inability to request data. Then I checked and it said to install this whitelist plug-in. But I have installed it, but it still doesn’t work. Do you need to configure anything else?

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I used cordova ionic to develop an ios app, but when I tested the app on the web page to access data, a cross-domain problem occurred, resulting in the inability to request data. Then I checked and it said to install this whitelist plug-in. But I have installed it, but it still doesn’t work. Do you need to configure anything else?