javascript 将绝对路径转换为相对路径
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Converting an absolute path to a relative path
提问by robdodson
Working in Node I need to convert my request path into a relative path so I can drop it into some templates that have a different folder structure.
在 Node 中工作我需要将我的请求路径转换为相对路径，以便我可以将其放入一些具有不同文件夹结构的模板中。
Basically if I start with the path "/foo/bar" I need my relative path to be ".." If it's "/foo/bar/baz" I need it to be "../.."
基本上如果我从路径“/foo/bar”开始，我需要我的相对路径是“..”如果它是“/foo/bar/baz”我需要它是“../..”
I wrote a pair of functions to do this:
我写了一对函数来做到这一点：
function splitPath(path) {
return path.split('/').map(dots).slice(2).join('/');
}
function dots() {
return '..';
}
Not sure if this is the best approach or if it's possible to do it with a regular expression in String.replace somehow?
不确定这是否是最好的方法，或者是否可以在 String.replace 中以某种方式使用正则表达式来实现？
edit
编辑
I should point out this is so I can render everything as static HTML, zip up the whole project, and send it to someone who doesn't have access to a web server. See my first comment.
我应该指出这是这样我可以将所有内容呈现为静态 HTML，压缩整个项目，然后将其发送给无法访问 Web 服务器的人。见我的第一条评论。
回答by Mattias
If I understand you question correct you can use path.relative(from, to)
如果我理解你的问题是正确的，你可以使用 path.relative(from, to)
Example:
例子：
var path = require('path');
console.log(path.relative('/foo/bar/baz', '/foo'));
回答by Vadim Baryshev
Node.js have native method for this purposes: path.relative(from, to).
为此，Node.js 有本机方法：path.relative(from, to)。
回答by Gung Foo
This might need some tuning but it should work:
这可能需要一些调整，但它应该可以工作：
function getPathRelation(position, basePath, input) {
var basePathR = basePath.split("/");
var inputR = input.split("/");
var output = "";
for(c=0; c < inputR.length; c++) {
if(c < position) continue;
if(basePathR.length <= c) output = "../" + output;
if(inputR[c] == basePathR[c]) output += inputR[c] + "/";
}
return output;
}
var basePath ="/foo"
var position = 2;
var input = "/foo";
console.log(getPathRelation(position,basePath,input));
var input = "/foo/bar";
console.log(getPathRelation(position,basePath,input));
var input = "/foo/bar/baz";
console.log(getPathRelation(position,basePath,input));
Result:
结果：
(an empty string)
../
../../
