Project reorganization, add editorconfig and linter

src/components/d-math.js

@@ -0,0 +1,28 @@
+import katex from "katex";
+import { Mutating } from "../mixins/mutating.js"
+import { Template } from "../mixins/template.js"
+import katexCSS from "../../node_modules/katex/dist/katex.min.css"
+
+const T = Template("d-math", `
+<style>
+
+d-math[block] {
+  display: block;
+}
+
+${katexCSS}
+
+</style>
+
+<span id="katex-container"></span>
+`);
+
+export class DMath extends Mutating(T(HTMLElement)) {
+
+  renderContent() {
+    const options = { displayMode: this.hasAttribute("block") };
+    const container = this.root.querySelector("#katex-container");
+    katex.render(this.textContent, container, options);
+  }
+
+}