- Linting (ESLint compat): Add eslint-plugin-compat to get browser su…

…pport

    warnings
- Docs (README): Indicate minimal polyfills needed for older browsers
    (IE <= 11, IE Mobile, Opera Mini, Blackberry Browser <= 10,
    Android Browser 4.4.3-4.4.4)
- npm: Update devDeps

.eslintrc

@@ -1,13 +1,19 @@
 {
-  "extends": ["standard", "plugin:qunit/recommended", "plugin:testcafe/recommended"],
+  "extends": [
+    "standard", "plugin:compat/recommended",
+    "plugin:qunit/recommended", "plugin:testcafe/recommended"
+  ],
   "parserOptions": {
     "sourceType": "module"
   },
-  "plugins": ["qunit", "testcafe"],
+  "plugins": ["compat", "qunit", "testcafe"],
   "env": {
     "node": false,
     "browser": true
   },
+  "settings": {
+    "polyfills": ["url", "promises", "fetch", "queryselector"]
+  },
   "rules": {
     "semi": [2, "always"],
     "indent": ["error", 2, {"outerIIFEBody": 0}],

CHANGES.md

@@ -1,7 +1,13 @@
 # ?
 
+- Linting (ESLint compat): Add eslint-plugin-compat to get browser support
+    warnings
+- Docs (README): Indicate minimal polyfills needed for older browsers
+    (IE <= 11, IE Mobile, Opera Mini, Blackberry Browser <= 10,
+    Android Browser 4.4.3-4.4.4)
 - Docs (3.0.0): Clarify
 - Docs (ReleaseInstructions): Clarify need for npm permissions to publish
+- npm: Update devDeps
 
 # 3.1.1
 

README.md

@@ -38,6 +38,21 @@ For testing the latest version in `master`, you may use
 <iframe src="svgedit/editor/svg-editor.html?extensions=" width="100%" height="100%"></iframe>
 ```
 
+Note that if you want support for the following browsers, you will at least
+need some polyfills.
+
+For Android Browser 4.4.3-4.4.4, you will need at least `fetch`.
+
+For the following, you will need at least `URL`, `Promise`, and `fetch`:
+
+- IE <= 11
+- IE Mobile
+- Opera Mini
+- Blackberry Browser <= 10
+
+And for still older browsers (e.g., IE 8), you will at minimum need a
+`querySelector` polyfill.
+
 ### Integrating SVG-edit into your own npm package
 
 These steps are only needed if you wish to set up your own npm package