js中的全局变量

function test(){
    var temp = "dsd";　　#局部
    console.log(temp);
}

test()    /*dsd*/
console.log(temp)    /*无法输出，变量为声明*/
/*
Uncaught ReferenceError: temp is not defined
*/

function test(){
    temp = "dsd";　　#全局
    console.log(temp);
}

test()    /*dsd*/
console.log(temp)     /*dsd*/

function test(){
    window[‘temp‘]= "dsd";
    console.log(window[‘temp‘]);
}

test()    /*dsd*/
console.log(window[‘temp‘])     /*dsd*/

function test(){
    v = "dsadas"  
    console.log(v)
}

test()    /*dsadas*/
console.log(v)    /*dsadas*/
console.log(window.v)   /*dsadas*/ 
console.log(window[‘v‘])    /*dsadas*/