JavaScript 中未定义的窗口变量

Question

I'm having a problem with a window level variable.

When I save data in that variable and try to read that data from it, it gives me undefined.

The following is the code:

window.cart;

function save(name, sku)
{
    window.cart = "sku: "+sku+", nombre: "+name;
};

function read()
{
    console.log(window.cart);
}

Answer 1

You need to call your function if you want to access to them and add a onload event to call this when windows body are loaded.

 function save(name, sku) { window.cart = "sku: "+sku+", nombre: "+name; }; function read() { console.log(window.cart); } document.body.onload = function(){ save(20, 'sku_new'); read(); }