Adopt type=module

.eslintrc.json

@@ -4,12 +4,8 @@
     "sourceType": "module",
     "ecmaVersion": 8
   },
-  "env": {
-    "es6": true
-  },
   "rules": {
     "no-cond-assign": 0,
-    "no-constant-condition": 0,
-    "no-floating-decimal": 2
+    "no-constant-condition": 0
   }
 }

.github/eslint.json

@@ -0,0 +1,18 @@
+{
+  "problemMatcher": [
+    {
+      "owner": "eslint-compact",
+      "pattern": [
+        {
+          "regexp": "^(.+):\\sline\\s(\\d+),\\scol\\s(\\d+),\\s(Error|Warning|Info)\\s-\\s(.+)\\s\\((.+)\\)$",
+          "file": 1,
+          "line": 2,
+          "column": 3,
+          "severity": 4,
+          "message": 5,
+          "code": 6
+        }
+      ]
+    }
+  ]
+}

.github/workflows/node.js.yml

@@ -0,0 +1,30 @@
+# https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: yarn --frozen-lockfile
+    - run: |
+        echo ::add-matcher::.github/eslint.json
+        yarn run eslint src test --format=compact
+    - run: yarn test

.gitignore

@@ -1,6 +1,5 @@
 *.sublime-workspace
 .DS_Store
 dist/
-test/output/
 node_modules
 npm-debug.log

LICENSE

@@ -1,39 +1,22 @@
-Copyright 2013-2016 Mike Bostock
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
-
-* Neither the name of the author nor the names of contributors may be used to
-  endorse or promote products derived from this software without specific prior
-  written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
+Copyright 2013-2021 Mike Bostock
 
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
 
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
+THIS SOFTWARE.
 
 MIT License for https://github.com/scijs/integrate-adaptive-simpson
 
 The MIT License (MIT)
 
-Copyright (c) 2015 Ricky Reusser
+Copyright 2015 Ricky Reusser
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -51,4 +34,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+THE SOFTWARE.

README.md

@@ -4,15 +4,27 @@ Extended geographic projections for [d3-geo](https://github.com/d3/d3-geo). See
 
 ## Installing
 
-If you use NPM, `npm install d3-geo-projection`. Otherwise, download the [latest release](https://github.com/d3/d3-geo-projection/releases/latest). You can also load directly from [d3js.org](https://d3js.org) as a [standalone library](https://d3js.org/d3-geo-projection.v2.min.js). AMD, CommonJS, and vanilla environments are supported. In vanilla, a `d3` global is exported:
+If you use npm, `npm install d3-geo-projection`. You can also download the [latest release on GitHub](https://github.com/d3/d3-geo-projection/releases/latest). For vanilla HTML in modern browsers, import d3-geo-projection from Skypack:
 
 ```html
-<script src="https://d3js.org/d3-array.v2.min.js"></script>
-<script src="https://d3js.org/d3-geo.v2.min.js"></script>
-<script src="https://d3js.org/d3-geo-projection.v3.min.js"></script>
+<script type="module">
+
+import {geoAitoff} from "https://cdn.skypack.dev/d3-geo-projection@4";
+
+const projection = geoAitoff();
+
+</script>
+```
+
+For legacy environments, you can load d3-geo-projection’s UMD bundle from an npm-based CDN such as jsDelivr; a `d3` global is exported:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/d3-array@3"></script>
+<script src="https://cdn.jsdelivr.net/npm/d3-geo@3"></script>
+<script src="https://cdn.jsdelivr.net/npm/d3-geo-projection@4"></script>
 <script>
 
-var aitoff = d3.geoAitoff();
+const projection = d3.geoAitoff();
 
 </script>
 ```

bin/geo2svg → bin/geo2svg.js

@@ -1,13 +1,19 @@
 #!/usr/bin/env node
 
-var os = require("os"),
-    commander = require("commander"),
-    d3 = Object.assign({}, require("d3-geo"), require("../")),
-    read = require("./read"),
-    write = require("./write");
+import {EOL} from "os";
+import {program} from "commander";
+import {geoPath} from "d3-geo";
+import {readFileSync} from "fs";
+import {dirname, resolve} from "path";
+import {fileURLToPath} from "url";
+import {geoQuantize} from "../src/index.js";
+import read from "./read.js";
+import write from "./write.js";
 
-commander
-    .version(require("../package.json").version)
+const version = JSON.parse(readFileSync(resolve(dirname(fileURLToPath(import.meta.url)), "../package.json"))).version;
+
+const options = program
+    .version(version)
     .usage("[options] [file]")
     .description("Convert GeoJSON to SVG.")
     .option("-o, --out <file>", "output file name; defaults to “-” for stdout", "-")
@@ -18,31 +24,36 @@ commander
     .option("--fill <value>", "default fill", "none")
     .option("--stroke <value>", "default stroke", "black")
     .option("-r, --radius <value>", "default point radius", 4.5)
-    .parse(process.argv);
+    .parse(process.argv)
+    .opts();
 
-if (commander.args.length === 0) commander.args[0] = "-";
-else if (commander.args.length !== 1) {
+if (program.args.length === 0) program.args[0] = "-";
+else if (program.args.length !== 1) {
   console.error();
   console.error("  error: multiple input files");
   console.error();
   process.exit(1);
 }
 
-var reader = read(commander.args[0], commander.newlineDelimited, transform).then(end).catch(abort),
-    writer = write(commander.out),
-    path = d3.geoPath().pointRadius(function(d) { var p = d.properties, v; return p && (v = p["point-radius"] || p.pointRadius) != null ? v : commander.radius; }),
-    render = commander.precision == null ? path : function(d) { return path(d3.geoQuantize(d, commander.precision)); };
+var reader = read(program.args[0], options.newlineDelimited, transform).then(end),
+    writer = write(options.out),
+    path = geoPath().pointRadius(function(d) { var p = d.properties, v; return p && (v = p["point-radius"] || p.pointRadius) != null ? v : options.radius; }),
+    render = options.precision == null ? path : function(d) { return path(geoQuantize(d, options.precision)); };
+
+reader.catch(error => {
+  console.error(error.stack);
+});
 
-writer.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>" + os.EOL
-    + "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">" + os.EOL
-    + "<!-- Generated by geo2svg " + require("../package.json").version + ". https://d3js.org/d3-geo-projection/ -->" + os.EOL
+writer.write("<?xml version=\"1.0\" encoding=\"utf-8\"?>" + EOL
+    + "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">" + EOL
+    + "<!-- Generated by geo2svg " + version + ". https://d3js.org/d3-geo-projection/ -->" + EOL
     + "<svg version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\""
-    + " width=\"" + +commander.width + "\""
-    + " height=\"" + +commander.height + "\""
-    + " viewBox=\"0 0 " + +commander.width + " " + +commander.height + "\""
-    + (commander.fill != "black" ? " fill=\"" + attr(commander.fill) + "\"" : "")
-    + (commander.stroke != "none" ? " stroke=\"" + attr(commander.stroke) + "\"" : "")
-    + ">" + os.EOL);
+    + " width=\"" + +options.width + "\""
+    + " height=\"" + +options.height + "\""
+    + " viewBox=\"0 0 " + +options.width + " " + +options.height + "\""
+    + (options.fill != "black" ? " fill=\"" + attr(options.fill) + "\"" : "")
+    + (options.stroke != "none" ? " stroke=\"" + attr(options.stroke) + "\"" : "")
+    + ">" + EOL);
 
 function transform(d) {
   var p = d.properties, v;
@@ -63,15 +74,11 @@ function transform(d) {
       + (v = render(d), v ? " d=\"" + v + "\"" : "")
       + ">"
       + ((v = p && p["title"]) != null ? "<title>" + text(v + "") + "</title>" : "")
-      + "</path>" + os.EOL);
+      + "</path>" + EOL);
 }
 
 function end() {
-  return writer.write("</svg>" + os.EOL);
-}
-
-function abort(error) {
-  console.error(error.stack);
+  return writer.write("</svg>" + EOL);
 }
 
 function text(string) {

bin/geograticule → bin/geograticule.js

@@ -1,11 +1,18 @@
 #!/usr/bin/env node
 
-var commander = require("commander"),
-    graticule = require("d3-geo").geoGraticule(),
-    write = require("./write");
+import {program} from "commander";
+import {geoGraticule} from "d3-geo";
+import {readFileSync} from "fs";
+import {dirname, resolve} from "path";
+import {fileURLToPath} from "url";
+import write from "./write.js";
 
-commander
-    .version(require("../package.json").version)
+const version = JSON.parse(readFileSync(resolve(dirname(fileURLToPath(import.meta.url)), "../package.json"))).version;
+
+const graticule = geoGraticule();
+
+const options = program
+    .version(version)
     .usage("[options]")
     .description("Generate a GeoJSON graticule.")
     .option("-o, --out <file>", "output file name; defaults to “-” for stdout", "-")
@@ -16,29 +23,30 @@ commander
     .option("--step-minor <value>", "the minor step; defaults to " + graticule.stepMinor(), parseStep)
     .option("--step-major <value>", "the major step; defaults to " + graticule.stepMajor(), parseStep)
     .option("--precision <value>", "the precision; defaults to " + graticule.precision(), graticule.precision)
-    .parse(process.argv);
+    .parse(process.argv)
+    .opts();
 
-if (commander.args.length !== 0) {
+if (program.args.length !== 0) {
   console.error();
   console.error("  error: unexpected arguments");
   console.error();
   process.exit(1);
 }
 
-if (commander.extent != null) {
-  if (commander.extentMinor == null) commander.extentMinor = commander.extent;
-  if (commander.extentMajor == null) commander.extentMajor = commander.extent;
+if (options.extent != null) {
+  if (options.extentMinor == null) options.extentMinor = options.extent;
+  if (options.extentMajor == null) options.extentMajor = options.extent;
 }
-if (commander.step != null) {
-  if (commander.stepMinor == null) commander.stepMinor = commander.step;
-  if (commander.stepMajor == null) commander.stepMajor = commander.step;
+if (options.step != null) {
+  if (options.stepMinor == null) options.stepMinor = options.step;
+  if (options.stepMajor == null) options.stepMajor = options.step;
 }
-if (commander.extentMinor != null) graticule.extentMinor(commander.extentMinor);
-if (commander.extentMajor != null) graticule.extentMajor(commander.extentMajor);
-if (commander.stepMinor != null) graticule.stepMinor(commander.stepMinor);
-if (commander.stepMajor != null) graticule.stepMajor(commander.stepMajor);
+if (options.extentMinor != null) graticule.extentMinor(options.extentMinor);
+if (options.extentMajor != null) graticule.extentMajor(options.extentMajor);
+if (options.stepMinor != null) graticule.stepMinor(options.stepMinor);
+if (options.stepMajor != null) graticule.stepMajor(options.stepMajor);
 
-var writer = write(commander.out);
+var writer = write(options.out);
 writer.write(JSON.stringify(graticule()) + "\n");
 writer.end().catch(abort);