var array = string.split(',');

MDN参考，主要有助于 limit 参数可能出现意外行为。 （提示：a，b，c.split（，，2）出现在 [a，b] ，而不是 [a，b，c] 。）

MDN reference, mostly helpful for the possibly unexpected behavior of the limit parameter. (Hint: "a,b,c".split(",", 2) comes out to ["a", "b"], not ["a", "b,c"].)