JavaScript 标记清除法总结

var globalVariable = {
	name: "I'm a global variable",
}

function fun() {
	var xiaoming = "codereasy";
}

fun();
console.log(window.globalVariable);
console.log(window.xiaoming);
//(1) {name: "I'm a global variable"}
//undefined

// 全局变量可以被视为根， 因此他们是可达的
let globalVariable = {
	name: "I'm a global variable",
}

// 函数的参数和内部变量也是可达的
function someFunction(someArgument) {
	let functionVariable = {
    	name: "I'm a variable inside of a function"
    };
    console.log(someArgument, functionVariable)
}

someFunction(globalVariable);

let objectA = {
	objectProperty: {
    	name: "I'm a property of an object",
    }
}

console.log(objectA.objectProperty);
// (1) {name: "I'm a global variable"}  
// (1) {name: "I'm a variable inside of a f...}