Function getUriScheme

Example

import { assertEquals } from "jsr:@std/assert"

// aliasing our functions for brevity
const eq = assertEquals, fn = getUriScheme

eq(fn("C:/Users/me/path/to/file.txt"),                  "local")
eq(fn("~/path/to/file.txt"),                            "local")
eq(fn("/usr/me/path/to/file.txt"),                      "local")
eq(fn("path/to/file.txt"),                              "relative")
eq(fn("./path/to/file.txt"),                            "relative")
eq(fn("../path/to/file.txt"),                           "relative")
eq(fn("file:///c://users/me/path/to/file.txt"),         "file")
eq(fn("file:///usr/me/path/to/file.txt"),               "file")
eq(fn("jsr:@user/path/to/file"),                        "jsr")
eq(fn("jsr:/@user/path/to/file"),                       "jsr")
eq(fn("npm:lib/path/to/file"),                          "npm")
eq(fn("npm:/lib/path/to/file"),                         "npm")
eq(fn("npm:/@scope/lib/path/to/file"),                  "npm")
eq(fn("node:http"),                                     "node")
eq(fn("node:fs/promises"),                              "node")
eq(fn("data:text/plain;charset=utf-8;base64,aGVsbG8="), "data")
eq(fn("blob:https://example.com/4800d2d8-a78c-4895"),   "blob")
eq(fn("http://google.com/style.css"),                   "http")
eq(fn("https://google.com/style.css"),                  "https")
eq(fn(""),                                              undefined)
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