Initial commit

node_modules/react-style-singleton/dist/es2019/singleton.js

@@ -0,0 +1,48 @@
+import { getNonce } from 'get-nonce';
+function makeStyleTag() {
+    if (!document)
+        return null;
+    const tag = document.createElement('style');
+    tag.type = 'text/css';
+    const nonce = getNonce();
+    if (nonce) {
+        tag.setAttribute('nonce', nonce);
+    }
+    return tag;
+}
+function injectStyles(tag, css) {
+    // @ts-ignore
+    if (tag.styleSheet) {
+        // @ts-ignore
+        tag.styleSheet.cssText = css;
+    }
+    else {
+        tag.appendChild(document.createTextNode(css));
+    }
+}
+function insertStyleTag(tag) {
+    const head = document.head || document.getElementsByTagName('head')[0];
+    head.appendChild(tag);
+}
+export const stylesheetSingleton = () => {
+    let counter = 0;
+    let stylesheet = null;
+    return {
+        add: (style) => {
+            if (counter == 0) {
+                if ((stylesheet = makeStyleTag())) {
+                    injectStyles(stylesheet, style);
+                    insertStyleTag(stylesheet);
+                }
+            }
+            counter++;
+        },
+        remove: () => {
+            counter--;
+            if (!counter && stylesheet) {
+                stylesheet.parentNode && stylesheet.parentNode.removeChild(stylesheet);
+                stylesheet = null;
+            }
+        },
+    };
+};