[英]Javascript declare variable in global scope shorthand
var object = {name: "Murad"};
(function(window){
var a = b = 10;
})(object)
Why I can access b variable in global scope? 为什么我可以在全局范围内访问b变量?
var a = b = 10
is not same thing with? 不一样吗?
window.b = 10;
var a = window.b;
You can access variable b because you give a variable name - b, but you do not declare it like var let or const. 您可以访问变量b,因为您提供了变量名-b,但是您没有像var let或const那样声明它。 JS will see that a name is allocated for a variable and it will create the variable automatically in the global scope.
JS将看到为变量分配了一个名称,它将在全局范围内自动创建该变量。
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