Pass css_classes as option to render function

src/render/draw.js

@@ -9,7 +9,7 @@ import * as clades from "./clades";
 import * as render_nodes from "./nodes";
 import * as render_edges from "./edges";
 import * as events from "./events";
-import { css_classes } from "./options";
+import { css_classes, initializeCssClasses } from "./options";
 import * as opt from "./options";
 import * as menus from "./menus";
 
@@ -22,6 +22,7 @@ function constant(x) {
 
 class TreeRender {
   constructor(phylotree, options = {}) {
+    initializeCssClasses(options['css-classes']);
     this.css_classes = css_classes;
     this.phylotree = phylotree;
     this.container = options.container;

src/render/options.js

@@ -18,6 +18,12 @@ export const css_classes = {
   node_text: "phylotree-node-text"
 };
 
+export function initializeCssClasses(classes = {}) {
+  Object.keys(classes).forEach(key => {
+    css_classes[key] = classes[key]
+  })
+}
+
 export function internalNames(attr) {
   if (!arguments.length) return this.options["internal-names"];
   this.options["internal-names"] = attr;

yarn.lock

@@ -4252,4 +4252,4 @@ yargs@^16.2.0:
 yarn@^1.22.11:
   version "1.22.18"
   resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.22.18.tgz#05b822ade8c672987bab8858635145da0850f78a"
-  integrity sha512-oFffv6Jp2+BTUBItzx1Z0dpikTX+raRdqupfqzeMKnoh7WD6RuPAxcqDkMUy9vafJkrB0YaV708znpuMhEBKGQ==
+  integrity sha512-oFffv6Jp2+BTUBItzx1Z0dpikTX+raRdqupfqzeMKnoh7WD6RuPAxcqDkMUy9vafJkrB0YaV708znpuMhEBKGQ==