Javascript在文本上剪切相同的第二个字符

Question

例如我有文本:

var x="default_1305, default_1695, default_1805";

我想在第二个逗号之前剪切以获得此文本:“default_1305, default_1695”。

我该怎么做？

Answer 1

var x="default_1305, default_1695, default_1805";

字符串可以被分割，如下所示:

var res = x.split(",", 2);

在第二个参数中注意 2。

如果需要作为字符串，则

var res_string = res.join(",");

---

编辑:

.split() on MDN

语法

str.split([separator[, limit]]) Parameters

分隔符

Optional. Specifies the character(s) to use for separating the string. The separator is treated as a string or a regular expression. If separator is omitted, the array returned contains one element consisting of the entire string. If separator is an empty string, str is converted to an array of characters.

限制

Optional. Integer specifying a limit on the number of splits to be found. The split() method still splits on every match of separator, until the number of split items match the limit or the string falls short of separator.