add build setup

.gitignore

@@ -0,0 +1 @@
+dist/

domutil.ts

@@ -0,0 +1 @@
+export * from "./makeDOM";

makeDOM.ts

@@ -16,7 +16,7 @@ type WithClassOrId<T extends keyof HTMLElementTagNameMap> =
   | `${T}#${string}`
   | `${T}.${string}`;
 
-export default function $el<T extends keyof HTMLElementTagNameMap>(
+export function $el<T extends keyof HTMLElementTagNameMap>(
   name: T | WithClassOrId<T>,
   ...desc: [Partial<ElementProperties<T>>, ...DOMElem[]] | DOMElem[]
 ): HTMLElementTagNameMap[T] {
@@ -45,7 +45,7 @@ export default function $el<T extends keyof HTMLElementTagNameMap>(
   const attributes = desc[0];
   if (typeof attributes === "object" && !(attributes instanceof Node)) {
     for (const attr in attributes) {
-      const value = attributes[attr];
+      const value = (attributes as Record<string, any>)[attr];
       if (attr.startsWith("@")) {
         el.addEventListener(attr.substring(1), value);
       } else if (attr === "dataset") {
@@ -53,7 +53,7 @@ export default function $el<T extends keyof HTMLElementTagNameMap>(
           el.dataset[key] = value[key];
         }
       } else {
-        el[attr] = value;
+        el[attr as keyof HTMLElementTagNameMap[T]] = value;
       }
     }
     desc.shift();
@@ -65,3 +65,5 @@ export default function $el<T extends keyof HTMLElementTagNameMap>(
 
   return el;
 }
+
+export default $el;

scripts/build.ts

@@ -0,0 +1,68 @@
+import { build, stop } from "https://deno.land/x/esbuild@v0.19.2/mod.js";
+import ts from "npm:typescript";
+
+// from https://github.com/Microsoft/TypeScript/issues/6387#issuecomment-169739615
+function error(diagnostics: ts.Diagnostic[]): void {
+  diagnostics.forEach((diagnostic) => {
+    let message = "Error";
+    if (diagnostic.file) {
+      const { line, character } = diagnostic.file.getLineAndCharacterOfPosition(
+        diagnostic.start || 0
+      );
+      message += ` ${diagnostic.file.fileName} (${line + 1},${character + 1})`;
+    }
+    message +=
+      ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, "\n");
+    console.log(message);
+  });
+}
+
+async function readConfigFile(configFileName: string) {
+  const configFileText = await Deno.readTextFile(configFileName);
+  const result = ts.parseConfigFileTextToJson(configFileName, configFileText);
+  if (result.error) {
+    error([result.error]);
+    Deno.exit(1);
+  }
+
+  const config = ts.parseJsonConfigFileContent(
+    result.config,
+    ts.sys,
+    await Deno.realPath(".")
+  );
+  if (config.errors.length > 0) {
+    error(config.errors);
+    Deno.exit(1);
+  }
+  return config;
+}
+
+async function buildDTS() {
+  const config = await readConfigFile("./tsconfig.json");
+  const emitted = ts
+    .createProgram(config.fileNames, {
+      ...config.options,
+      emitDeclarationOnly: true,
+    })
+    .emit();
+  if (emitted.diagnostics.length > 0) {
+    error(emitted.diagnostics.slice());
+    Deno.exit(1);
+  }
+}
+
+async function buildESM() {
+  await build({
+    bundle: true,
+    minify: true,
+    keepNames: true,
+    target: "es2017", // Required because OBS ships with a really old version of Chrome
+    entryPoints: ["./domutil.ts"],
+    outfile: "./dist/domutil.js",
+    format: "esm",
+    sourcemap: true,
+  });
+  await stop();
+}
+
+await Promise.all([buildDTS(), buildESM()]);

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ES2017",
+    "module": "ES2020",
+    "moduleResolution": "node",
+    "declaration": true,
+    "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "strictBindCallApply": true,
+    "strictPropertyInitialization": true,
+    "noImplicitThis": true,
+    "alwaysStrict": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "outDir": "./dist",
+    "lib": ["ES2017", "dom"]
+  },
+  "exclude": ["dist", "scripts"],
+}