js判断字符是否在数组中【转】

//检测某个字符是否在此数组中
function isInArray(arr, str) {
    var testStr = ',' + arr.join(",") + ",";
    return testStr.indexOf("," + str + ",") != -1 ;
}
var arr = ["101", "102", "103"];
console.log(isInArray(arr,"101"));//true

文章转自：https://blog.csdn.net/weixin_38052444/article/details/81805870