SOURCE

var array = ["first","second","third","fourth"];
        
// 会遍历数组所有元素，只是执行到第3次师，return false下面的代码不再执行而已
array.forEach(function(item,index){
    if (item == "third") {
        return false;
    }
    console.log(item);// first,second，fourth
});

// 跳出条件以后的循环
try {
    var arr = ["first","second","third","fourth"];
    arr.forEach((item, index) => {
        if(item === 'five') {
           throw new Error('End 本次')
        }
        console.log(item)
    })
} catch (e) {
    // console.log(e.message)
    if(e.message !== 'End 本次') throw e // 不用输出e
}
console.log('继续执行')