let str = "January,February,March,April,May,June,July,August,September,October,November,December"

let arr = str.split(',');

这将导致：

["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

如果要将以下内容转换为：

["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

这：

"January,February,March,April,May,June,July,August,September,October,November,December";

use:

str = arr.join(',')

最短的

str.split`,`

var str=“一月、二月、三月、四月、五月、六月、七月、八月、九月、十月、十一月、十二月”；让arr=str.split`，`；控制台日志（arr）；

let myString = "January,February,March,April,May,June,July,August,September,October,November,December";
      const temp=myString .split(",");
      console.log(temp);

输出：-[“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”]

非常简单，您可以使用拆分默认javascript函数。

将逗号分隔的字符串传递到此函数，它将返回一个数组，如果找不到逗号分隔字符串，则返回null。

function splitTheString(CommaSepStr) {
    var ResultArray = null;

    // Check if the string is null or so.
    if (CommaSepStr!= null) {

        var SplitChars = ',';

        // Check if the string has comma of not will go to else
        if (CommaSepStr.indexOf(SplitChars) >= 0) {
            ResultArray = CommaSepStr.split(SplitChars);

        }
        else {

            // The string has only one value, and we can also check
            // the length of the string or time and cross-check too.
            ResultArray = [CommaSepStr];
        }
    }
    return ResultArray;
}

最简单的方法：

let myStr = '1, 2, 3, 4, 5, 7, 8';

const stringToArr = (myStr) => {
    return myStr.split(',').map(x => x.trim());
};

请注意：

var a = "";
var x = new Array();
x = a.split(",");
alert(x.length);

将提醒1