javascript中的常量var [重复]

Question

我遇到了一个小问题，我有一个名为“widgets”的变量，我想将它的原始值存储在“storeWigets”中，即使我更新了“widgets”的值，我的变量“storeWidgets”也会保留在'widgets' 的原始值。

var widgets=["1","2","3","4"];
var storeWidgets;
storeWidgets = widgets;
widgets[0]=0;
alert(storeWidgets);

我有一个example on jsfiddle，我最终需要我的 'storeWidgets' 保留值 ["1","2","3","4"] 但它一直返回给我 ["0", "2","3","4"]

Answer 1

试试这个

var widgets=["1","2","3","4"];
var storeWidgets;
storeWidgets = widgets.slice(0);;
widgets[0]=0;
alert(widgets);
alert(storeWidgets);