Node.js path.format()方法

原文:https://www.geeksforgeeks.org/node-js-path-format-method/

path.format()方法用于从给定的路径对象返回路径字符串。该方法有一些规则，其中一个路径属性比另一个获得更高的优先级:

  • If the "dir" parameter is provided, the "root" parameter of the path object is ignored.
  • If the Basic parameter is provided, the "ext" and "name" parameters of the path object are ignored.

语法:

path.format( pathObject )

参数:该函数接受包含路径细节的单个参数病理对象。它有以下参数:

  • dir: It specifies the directory name of the path object.
  • Root: Specifies the root of the path object.
  • Basis: Specify the basis of the path object.
  • Name: Specifies the file name of the path object.
  • ext: Specify the file extension of the path object.

返回值:从提供的路径对象返回路径字符串。

下面的程序说明了 Node.js 中的 path.format()方法:

例 1: 在 POSIX

// Import the path module
const path = require('path');

// CASE 1
// If "dir", "root" and "base" are all given,
// "root" is ignored.
let path1 = path.format({
    root: "/ignored/root/",
    dir: "/home/user/personal",
    base: "details.txt",
});
console.log("Path 1:", path1);

// CASE 2
// If "dir" is not specified then "root" will be used 
// If only "root" is provided
// platform separator will not be included.
// "ext" will be ignored.
let path2 = path.format({
    root: "/",
    base: "game.dat",
    ext: ".noextension",
});
console.log("Path 2:", path2);

// CASE 3
// If "base" is not specified
// "name" and "ext" will be used 
let path3 = path.format({
    root: "/images/",
    name: "image",
    ext: ".jpg",
});
console.log("Path 3:", path3);

上

输出:

Path 1: /home/user/personal/details.txt
Path 2: /game.dat
Path 3: /images/image.jpg

示例 2: 在 Windows 上

// Import the path module
const path = require('path');

// CASE 1
// If "dir", "root" and "base" are all given,
// "root" is ignored.
let path1 = path.format({
    root: "C:\\ignored\\root",
    dir: "website\\dist",
    base: "index.html",
});
console.log("Path 1:", path1);

// CASE 2
// If "dir" is not specified then "root"
// will be used 
// If only "root" is provided platform
// separator will not be included.
// "ext" will be ignored.
let path2 = path.format({
    root: "C:\\",
    base: "style.css",
    ext: ".ignored",
});
console.log("Path 2:", path2);

// CASE 3
// If "base" is not specified
// "name" and "ext" will be used 
let path3 = path.format({
    root: "website\\",
    name: "main",
    ext: ".js",
});
console.log("Path 3:", path3);

输出:

Path 1: website\dist\index.html
Path 2: C:\style.css
Path 3: website\main.js

参考:https://nodejs . org/API/path . html # path _ path _ format _ pathobject

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