support for hx-request attribute with the following config values:

* `timeout` - the request timeout
* `credentials` - send credentials w/ the request
* `noHeaders` - do not send any non-standard headers with the request

We also support the `htmx.config.timeout` configuration value for setting the default timeout

src/htmx.js

@@ -50,6 +50,7 @@ return (function () {
                 allowEval:true,
                 attributesToSettle:["class", "style", "width", "height"],
                 withCredentials:false,
+                timeout:0,
                 wsReconnectDelay: 'full-jitter',
                 disableSelector: "[hx-disable], [data-hx-disable]",
                 useTemplateFragments: false,
@@ -2018,6 +2019,9 @@ return (function () {
                 if (str.indexOf("javascript:") === 0) {
                     str = str.substr(11);
                     evaluateValue = true;
+                } else if (str.indexOf("js:") === 0) {
+                    str = str.substr(3);
+                    evaluateValue = true;
                 }
                 if (str.indexOf('{') !== 0) {
                     str = "{" + str + "}";
@@ -2224,6 +2228,8 @@ return (function () {
                 path = getDocument().location.href;
             }
 
+            var requestAttrValues = getValuesForElement(elt, 'hx-request');
+
             var requestConfig = {
                 parameters: filteredParameters,
                 unfilteredParameters: allParameters,
@@ -2231,6 +2237,8 @@ return (function () {
                 target:target,
                 verb:verb,
                 errors:errors,
+                withCredentials: requestAttrValues.credentials || htmx.config.withCredentials,
+                timeout:  requestAttrValues.timeout || htmx.config.timeout,
                 path:path,
                 triggeringEvent:event
             };
@@ -2278,13 +2286,18 @@ return (function () {
             }
 
             xhr.overrideMimeType("text/html");
-            xhr.withCredentials = htmx.config.withCredentials;
+            xhr.withCredentials = requestConfig.withCredentials;
+            xhr.timeout = requestConfig.timeout;
 
             // request headers
-            for (var header in headers) {
-                if (headers.hasOwnProperty(header)) {
-                    var headerValue = headers[header];
-                    safelySetHeaderValue(xhr, header, headerValue);
+            if (requestAttrValues.noHeaders) {
+                // ignore all headers
+            } else {
+                for (var header in headers) {
+                    if (headers.hasOwnProperty(header)) {
+                        var headerValue = headers[header];
+                        safelySetHeaderValue(xhr, header, headerValue);
+                    }
                 }
             }
 
@@ -2336,6 +2349,13 @@ return (function () {
                 maybeCall(reject);
                 endRequestLock();
             }
+            xhr.ontimeout = function() {
+                removeRequestIndicatorClasses(indicators);
+                triggerErrorEvent(elt, 'htmx:afterRequest', responseInfo);
+                triggerErrorEvent(elt, 'htmx:timeout', responseInfo);
+                maybeCall(reject);
+                endRequestLock();
+            }
             if(!triggerEvent(elt, 'htmx:beforeRequest', responseInfo)){
                 maybeCall(resolve);
                 endRequestLock()

test/attributes/hx-request.js

@@ -0,0 +1,39 @@
+describe("hx-request attribute", function() {
+    beforeEach(function () {
+        this.server = makeServer();
+        clearWorkArea();
+    });
+    afterEach(function () {
+        this.server.restore();
+        clearWorkArea();
+    });
+
+    it('basic hx-request timeout works', function (done) {
+        var timedOut = false;
+        this.server.respondWith("GET", "/test", "Clicked!");
+        var div = make("<div hx-post='/vars' hx-request='\"timeout\":1'></div>")
+        htmx.on(div, 'htmx:timeout', function(){
+            timedOut = true;
+        })
+        div.click();
+        setTimeout(function(){
+            div.innerHTML.should.equal("");
+            // unfortunately it looks like sinon.js doesn't implement the timeout functionality
+            // timedOut.should.equal(true);
+            done();
+        }, 400)
+    });
+
+    it('hx-request header works', function () {
+        this.server.respondWith("POST", "/vars", function (xhr) {
+            should.equal(xhr.requestHeaders['HX-Request'], undefined);
+            xhr.respond(200, {}, "Clicked!")
+        });
+        var div = make("<div hx-post='/vars' hx-request='{\"noHeaders\":true}'></div>")
+        div.click();
+        this.server.respond();
+        div.innerHTML.should.equal("Clicked!");
+    });
+
+
+});

test/index.html

@@ -104,6 +104,7 @@
 <script src="attributes/hx-preserve.js"></script>
 <script src="attributes/hx-push-url.js"></script>
 <script src="attributes/hx-put.js"></script>
+<script src="attributes/hx-request.js"></script>
 <script src="attributes/hx-select.js"></script>
 <script src="attributes/hx-sse.js"></script>
 <script src="attributes/hx-swap-oob.js"></script>