Javascript 删除两个' / '之间的字符串

Question

我正在寻找一些帮助，我是新手学习Javascript，我想删除路径中的最后一个文件夹名称。

示例：/FOLDER1/FOLDER2/FOLDER3/是我当前的路径，我想得到像/FOLDER1/FOLDER2/这样的结果

多谢。

Answer 1

var path =  '/FOLDER1/FOLDER2/FOLDER3/';
var splitPath = path.split('/');//[0] = '', [1] = FOLDER1, [2] = FOLDER2, [3] = FOLDER3
var finalPath = "/" + splitPath[1]+  "/"+ splitPath[2] + "/";

Answer 2

试试这个

var path =  '/FOLDER1/FOLDER2/FOLDER3/';
var splitPath = path.split('/');    // ["", "FOLDER1", "FOLDER2", "FOLDER3", ""]
splitPath.shift();    // ["FOLDER1", "FOLDER2", "FOLDER3", ""]
splitPath.pop();    // ["FOLDER1", "FOLDER2", "FOLDER3"]
splitPath.pop();    // ["FOLDER1", "FOLDER2"]
var result = "/" + splitPath.join("/") + "/";    // "/FOLDER1/FOLDER2/"
console.log(result);

Answer 3

这是另一种方式：

'/FOLDER1/FOLDER2/FOLDER3/'.replace(/(w*/)$/, '');
//gives you: "/FOLDER1/FOLDER2/"

再来一个：

var s = "FOLDER1/FOLDER2/FOLDER3/";
var ss = s.replace(//$/, '');
ss.substring(0, ss.lastIndexOf('/'));

另一个：

const [path1, path2] = "FOLDER1/FOLDER2/FOLDER3/".split("/")
console.log('path: ', `/${path1}/${path2}/`);

另一个：

var s = "FOLDER1/FOLDER2/FOLDER3/";
const [newPath] = s.split(/(w+/)$/)
//"FOLDER1/FOLDER2/"

Answer 4

let path = "/FOLDER1/FOLDER2/FOLDER3/"
let result = path.split("/").filter((el,idx, arr) => idx < arr.length - 2).join("/") + "/"
console.log(result)