fix unit test issue cause by node's module rules

package.json

@@ -15,7 +15,7 @@
     "build": "node scripts/updateVersion.cjs && node scripts/generateEmbedCss.cjs && npx rollup --config",
     "build_iife": "node scripts/updateVersion.cjs && node scripts/generateEmbedCss.cjs && npx rollup --config rollup.config.iife.js",
     "updateCSS": "node scripts/generateEmbedCss.cjs",
-    "test": "mocha -ui tdd"
+    "test": "node test/utils/forceESM.cjs && mocha -ui tdd"
   },
   "author": {
     "name": "Jim Robinson"

test/utils/forceESM.cjs

@@ -0,0 +1,23 @@
+/*
+* Workaround for nodes archaic insistence that es modules have ".mjs" extensions or have "type=module" in package.json.
+* This script will insert "type": "module" into the package.json of listed modules*
+*/
+
+const fs = require('fs')
+
+const packages = ['html2canvas']
+
+for (let p of packages) {
+    forceESM(p)
+}
+function forceESM(packageName) {
+
+    const packageJSON = require(`../../node_modules/${packageName}/package.json`)
+    packageJSON['type'] = 'module'
+
+    const outputFile = require.resolve(`../../node_modules/${packageName}/package.json`)
+    fs.writeFileSync(outputFile, JSON.stringify(packageJSON, null, 2))
+
+
+}
+

test/utils/mockObjects.js

@@ -17,6 +17,9 @@ global.document.implementation = new DOMImplementation()    // For jQUery
 global.window = {
     document: global.document,
     setTimeout: function () {
+    },
+    location : {
+        href: ""
     }
 }