jquery中的return false每个循环并没有结束整个函数

如果您需要捕获打破循环并返回false:

function testMehtod() {
    var itemIds = [];
    var ret = true; // our flag variable with default value - everything is good
    
    $("#confirmOrderItemContainer").find(":checkbox:checked").each(function (i, o) {
        itemIds[i] = $(o).attr('item-id');
        if (isNaN(itemIds[i])) { // not good
            ret = false; // let set flag about it
            return false; // break $.each loop
        } 
    });
    if (ret === false) { // not good? let's leave function
        return false;
    }

    //other logic ...
}