Unity WebGL 调用js脚本获取浏览器平台信息

参考：

Interaction with browser scripting - Unity 手册

在Assets/Plugins路径下创建js.jslib文件，打开后输入

mergeInto(LibraryManager.library,{
    GetUserAgent:function() {
        var returnStr = navigator.userAgent;
        var bufferSize = lengthBytesUTF8(returnStr) + 1;
        var buffer = _malloc(bufferSize);
        stringToUTF8(returnStr, buffer, bufferSize);
        return buffer;
    },
});

然后在Unity中创建如下的MonoBehaviour脚本，调用前面的js方法。

using System.Runtime.InteropServices;
using UnityEngine;

public class GameManager : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern string GetUserAgent();
    // Start is called before the first frame update
    void Start()