如何将3个数组的值加到一个数组中

concat function .

var food = meat.concat(veg,sauce);

var food = {
    meat: meat,
    veg: veg,
    sauce: sauce
};

food.meat food.veg 和 food.sauce .

concat()

var meat = ["m","e","a","t"];
var veg = ["v","e","g"];
var sauce = ["s","a","u","c","e"];

var food = meat.concat(veg, sauce);
alert(food);

我希望这就是你想要的。

https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/concat