...because in browsers, all global variables global variables declared with var are properties of the window object. (In the latest specification, ECMAScript ... ... <看更多>

In case you declare a variable outside of a function, JavaScript adds it to the global scope. In JavaScript, you define a function as follows:. ... <看更多>

Variables which are defined outside of a function block have Global scope. This means, they can be seen everywhere in your JavaScript code. ... <看更多>