定義一個全局變量，但Chrome的控制檯返回undefined

Question

這是我的代碼：

jQuery(function ($){ 
    var player = $('#player'); 
    var time = 0; 

    function setCookie(cname, cvalue, exdays) { 
     var d = new Date(); 
     d.setTime(d.getTime() + (exdays*24*60*60*1000)); 
     var expires = "expires="+ d.toUTCString(); 
     document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/"; 
    } 

    player.bind('pause', function(){ 
     console.log('player was paused'); 
     console.log(player.currentTime); 
     setCookie("time", player.currentTime, 2) 
    }); 
}); 

我聲明兩個變量（一個對象和一個數字）。對象player被正確定義，但是當我嘗試呼叫time時，控制檯返回未定義狀態。

Answer 1

你可能真的把它定義爲全局的嗎？

jQuery(function ($){ 
var player = $('#player'); 
window.time = 0; 

function setCookie(cname, cvalue, exdays) { 
    var d = new Date(); 
    d.setTime(d.getTime() + (exdays*24*60*60*1000)); 
    var expires = "expires="+ d.toUTCString(); 
    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/"; 
    } 

player.bind('pause', function(){ 
    console.log('player was paused'); 
    console.log(player.currentTime);//what should curentTime be? 
    setCookie("time", player.currentTime, 2); 
    window.time=player.currentTime;//an example 
}); 
}); 

現在真的是全球...

//in the console 
console.log(time); 

Answer 2

您還沒有聲明的全局變量。這兩個值在全局範圍內都是未定義的。要擁有全球範圍，您可以像這樣定義。

var player = $('#player'); 
var time = 0; 
jQuery(function ($){ 
    function setCookie(cname, cvalue, exdays) { 
     var d = new Date(); 
     d.setTime(d.getTime() + (exdays*24*60*60*1000)); 
     var expires = "expires="+ d.toUTCString(); 
     document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/"; 
    } 

    player.bind('pause', function(){ 
     console.log('player was paused'); 
     console.log(player.currentTime); 
     setCookie("time", player.currentTime, 2) 
    }); 
});