Question

我正在编写一个主要使用服务器端代码的应用程序。但无论何时连接正确，都会抛出错误。请帮忙。

function checkConnection() {
        var networkState = navigator.connection.type;

        var states = {};
        states[Connection.UNKNOWN]  = 'Unknown connection';
        states[Connection.ETHERNET] = 'Ethernet connection';
        states[Connection.WIFI]     = 'WiFi connection';
        states[Connection.CELL_2G]  = 'Cell 2G connection';
        states[Connection.CELL_3G]  = 'Cell 3G connection';
        states[Connection.CELL_4G]  = 'Cell 4G connection';
        states[Connection.CELL]     = 'Cell generic connection';
        states[Connection.NONE]     = 'No network connection';

        if (states[networkState]="Unknown connection")
        {
        alert('Get in a trusted Connection: ' + states[networkState]);
        }
        else if (states[networkState]="No network connection")
        {
        alert('Warning: ' + states[networkState]+': Please Get Connection and Reconnect');
        }
        else
        {
        var ref = window.open('http://70.61.212.124:8083', '_self', 'location=no');
        }
    }

Answer 1

在你的陈述中

 if (states[networkState]="Unknown connection")
            {
            alert('Get in a trusted Connection: ' + states[networkState]);
            }

您正在分配

states[networkState]="Unknown connection"

所以

的价值

states[networkState]始终为"Unknown connection"，此if条件始终为true，因为赋值始终返回true。

我希望你真正想做的是

states[networkState]=="Unknown connection"

网络错误，无论语句结构如何

1 个答案: