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+ `);
+ doc.prepend(modalContent);
+
+ let modalPopupElement = document.getElementById("modal");
+ let bookBodyElement = document.querySelector("div.book-body");
+ let oldBookBodyLeft = "0";
+ let oldBookBodyCSSTransform = "none";
+ let bookSummaryElement = document.querySelector("div.book-summary");
+ let oldBookSummaryLeft = "0";
+
+ function showPopup() {
+ modalPopupElement.style.display = "block";
+
+ // Switch off 'CSS transform' for the book body (it breaks the modal popup)
+ oldBookBodyCSSTransform = bookBodyElement.style.transform;
+ bookBodyElement.style.transform = "none";
+ bookBodyElement.style.webkitTransform = "none";
+ bookBodyElement.style.MozTransform = "none";
+
+ // Hide the 'book summary' tab
+ oldBookSummaryLeft = bookSummaryElement.style.left;
+ bookSummaryElement.style.left = "-100%";
+
+ // Arrange the book body on the left
+ oldBookBodyLeft = bookBodyElement.style.left;
+ bookBodyElement.style.left = "0";
+ }
+
+ function hidePopup() {
+ modalPopupElement.style.display = "none";
+
+ // Restore 'CSS transform' for the book body (to its previous state before the popup)
+ bookBodyElement.style.transform = oldBookBodyCSSTransform;
+ bookBodyElement.style.webkitTransform = oldBookBodyCSSTransform;
+ bookBodyElement.style.MozTransform = oldBookBodyCSSTransform;
+
+ // Restore the 'book summary' tab (to its previous state before the popup)
+ bookSummaryElement.style.left = oldBookSummaryLeft;
+
+ // Restore the book body position (to its previous state before the popup)
+ bookBodyElement.style.left = oldBookBodyLeft;
+ }
+
+ // Wait some time and display the modal popup
+ setTimeout(showPopup, 10000);
+
+ // Close button --> hide the modal popup
+ let button = document.getElementById("close-btn");
+ button.onclick = hidePopup;
+
+ // Global click --> hide the modal popup
+ window.onclick = function(event) {
+ if (event.target == modalPopupElement) {
+ hidePopup();
+ }
+ }
+});
diff --git a/docs/assets/js/repl.it-code-runner.js b/docs/assets/js/repl.it-code-runner.js
new file mode 100755
index 0000000..2f07bb5
--- /dev/null
+++ b/docs/assets/js/repl.it-code-runner.js
@@ -0,0 +1,34 @@
+gitbook.events.bind("page.change", function() {
+ let runCodeLinks = $("p:contains('тествате примера онлайн:') a");
+ for (let link of runCodeLinks) {
+ if (typeof(link.href) == "string" && link.href.startsWith("https://repl.it/")) {
+ // A repl.it link is found --> check for code box above it
+ let codeBox = $(link).parent().prev();
+ if (codeBox.is("pre")) {
+ // A code box is found just before the code link --> inject the [Run] button
+ let runButton = $("
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