more old-browser support:

* polyfill Set() for gridview (ie9, ie10)
* navpane: do full-page nav if history api is ng (ie9)
* show markdown as plaintext if rendering fails (ie*)
* text-editor: hide preview pane if it doesn't work (ie*)
* explicitly hide toasts on close (ie9, ff10)

copyparty/web/browser.css

@@ -818,6 +818,10 @@ html.y #path a:hover {
 .logue:empty {
 	display: none;
 }
+.logue.raw {
+	white-space: pre;
+	font-family: 'scp', 'consolas', monospace;
+}
 #doc>iframe,
 .logue>iframe {
 	background: var(--bgg);

copyparty/web/browser.js

@@ -372,7 +372,7 @@ var Ls = {
 		"s_t1": "tags contains   (^=start, end=$)",
 		"s_a1": "specific metadata properties",
 
-		"md_eshow": "cannot show ",
+		"md_eshow": "cannot render ",
 		"md_off": "[📜<em>readme</em>] disabled in [⚙️] -- document hidden",
 
 		"xhr403": "403: Access denied\n\ntry pressing F5, maybe you got logged out",
@@ -855,7 +855,7 @@ var Ls = {
 		"s_t1": "sang-info inneholder",
 		"s_a1": "konkrete egenskaper",
 
-		"md_eshow": "kan ikke vise ",
+		"md_eshow": "viser forenklet ",
 		"md_off": "[📜<em>readme</em>] er avskrudd i [⚙️] -- dokument skjult",
 
 		"xhr403": "403: Tilgang nektet\n\nkanskje du ble logget ut? prøv å trykk F5",
@@ -5933,6 +5933,9 @@ var treectl = (function () {
 	}
 
 	r.reqls = function (url, hpush, back) {
+		if (IE && !history.pushState)
+			return window.location = url;
+
 		var xhr = new XHR();
 		xhr.top = url.split('?')[0];
 		xhr.back = back
@@ -7378,8 +7381,11 @@ function show_md(md, name, div, url, depth) {
 
 	wfp_debounce.hide();
 	if (!marked) {
-		if (depth)
+		if (depth) {
+			clmod(div, 'raw', 1);
+			div.textContent = "--[ " + name + " ]---------\r\n" + md;
 			return toast.warn(10, errmsg + (window.WebAssembly ? 'failed to load marked.js' : 'your browser is too old'));
+		}
 
 		wfp_debounce.n--;
 		return import_js(SR + '/.cpr/deps/marked.js', function () {

copyparty/web/md2.js

@@ -163,7 +163,7 @@ redraw = (function () {
     dom_sbs.onclick = setsbs;
     dom_nsbs.onclick = modetoggle;
 
-    onresize();
+    (IE ? modetoggle : onresize)();
     return onresize;
 })();
 

copyparty/web/ui.css

@@ -105,6 +105,9 @@ html {
 #toast pre {
 	margin: 0;
 }
+#toast.hide {
+	display: none;
+}
 #toast.vis {
 	right: 1.3em;
 	transform: inherit;

copyparty/web/util.js

@@ -161,6 +161,9 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
     if (url.indexOf(' > eval') + 1 && !evalex_fatal)
         return;  // md timer
 
+    if (IE && url.indexOf('prism.js') + 1)
+        return;
+
     var ekey = url + '\n' + lineNo + '\n' + msg;
     if (ignexd[ekey] || crashed)
         return;
@@ -376,6 +379,22 @@ catch (ex) {
     }
 }
 
+if (!window.Set)
+    window.Set = function () {
+        var r = this;
+        r.size = 0;
+        r.d = {};
+        r.add = function (k) {
+            if (!r.d[k]) {
+                r.d[k] = 1;
+                r.size++;
+            }
+        };
+        r.has = function (k) {
+            return r.d[k];
+        };
+    };
+
 // https://stackoverflow.com/a/950146
 function import_js(url, cb, ecb) {
     var head = document.head || document.getElementsByTagName('head')[0];
@@ -1404,6 +1423,10 @@ var toast = (function () {
         clmod(obj, 'vis');
         r.visible = false;
         r.tag = obj;
+        if (!window.WebAssembly)
+            te = setTimeout(function () {
+                obj.className = 'hide';
+            }, 500);
     };
 
     r.show = function (cl, sec, txt, tag) {