loadUrl enhancements (#134)

`loadUrl` enhancements

- Make `options` parameter optional
- Allow partial overriding of instance options when calling `loadUrl` directly
- Make `requestOptions` optional
- Document `loadUrl` usage and provide examples

README.md

@@ -124,9 +124,13 @@ To see if Pjax is actually supported by your browser, use `Pjax.isSupported()`.
 
 ## Usage
 
-### `new Pjax()`
+### Methods
 
-Let's talk more about the most basic way to get started:
+#### `new Pjax()`
+
+Let's talk more about the most basic way to get started.
+
+When instantiating `Pjax`, you can pass options in to the constructor as an object:
 
 ```js
 new Pjax({
@@ -153,12 +157,24 @@ Pjax.prototype.getElements = function() {
   return document.getElementsByClassName(".js-Pjax")
 }
 
-new Pjax({})
+new Pjax()
 ```
 
-When instantiating a `Pjax` object, you need to pass all options as an object:
+#### `loadUrl(href, [options])`
 
-#### Options
+With this method, you can manually trigger loading of a URL:
+
+```js
+var pjax = new Pjax()
+
+// use case 1 (without options override)
+pjax.loadUrl("/your-url")
+
+// use case 2 (with options override)
+pjax.loadUrl("/your-other-url", {timeout: 10})
+```
+
+### Options
 
 ##### `elements` (String, default: `"a[href], form[action]"`)
 

example/example.js

@@ -1,4 +1,31 @@
 /* global Pjax */
+var pjax;
+var initButtons = function() {
+  var buttons = document.querySelectorAll("button[data-manual-trigger]")
+
+  if (!buttons) {
+    return
+  }
+
+  // jshint -W083
+  for (var i = 0; i < buttons.length; i++) {
+    buttons[i].addEventListener("click", function(e) {
+      var el = e.currentTarget
+
+      if (el.getAttribute("data-manual-trigger-override") === "true") {
+        // Manually load URL with overridden Pjax instance options
+        pjax.loadUrl("/example/page2.html", {cacheBust: false})
+      }
+      else
+      {
+        // Manually load URL with current Pjax instance options
+        pjax.loadUrl("/example/page2.html")
+      }
+    })
+  }
+  // jshint +W083
+}
+
 console.log("Document initialized:", window.location.href)
 
 document.addEventListener("pjax:send", function() {
@@ -15,14 +42,20 @@ document.addEventListener("pjax:error", function() {
 
 document.addEventListener("pjax:success", function() {
   console.log("Event: pjax:success", arguments)
+
+  // Init page content
+  initButtons()
 })
 
 document.addEventListener("DOMContentLoaded", function() {
-  var pjax = new Pjax({
+  // Init Pjax instance
+  pjax = new Pjax({
     elements: [".js-Pjax"],
     selectors: [".body", "title"],
-    cacheBust: true,
-    // currentUrlFullReload: true,
+    cacheBust: true
   })
   console.log("Pjax initialized.", pjax)
+
+  // Init page content
+  initButtons()
 })

example/index.html

@@ -13,6 +13,13 @@
       Go to <a href="page2.html" class="js-Pjax">Page 2</a> or <a href="page3.html" class="js-Pjax">Page 3</a> and view your console to see Pjax events.
       Clicking on <a href="index.html">this page</a> will just reload the page entirely.
 
+      <h2>Manual URL loading</h2>
+
+      You can use Pjax's <i>loadUrl</i> method to manually load a URL. Click the buttons below to try it out!<br /><br />
+
+      <button data-manual-trigger>loadUrl with current options</button><br /><br />
+      <button data-manual-trigger data-manual-trigger-override="true">loadUrl with overridden options (no cache busting)</button>
+
       <h2>Forms</h2>
 
       You can submit GET or POST forms with Pjax! Go to the <a href="forms.html">form examples</a> to try it out.

index.js

@@ -1,13 +1,15 @@
-var clone = require("./lib/clone.js")
 var executeScripts = require("./lib/execute-scripts.js")
 var forEachEls = require("./lib/foreach-els.js")
+var parseOptions = require("./lib/parse-options.js")
 var switches = require("./lib/switches")
 var newUid = require("./lib/uniqueid.js")
 
 var on = require("./lib/events/on.js")
 var trigger = require("./lib/events/trigger.js")
 
+var clone = require("./lib/util/clone.js")
 var contains = require("./lib/util/contains.js")
+var extend = require("./lib/util/extend.js")
 var noop = require("./lib/util/noop")
 
 var Pjax = function(options) {
@@ -17,8 +19,8 @@ var Pjax = function(options) {
       options: null
     }
 
-    var parseOptions = require("./lib/proto/parse-options.js")
-    parseOptions.call(this,options)
+
+    this.options = parseOptions(options)
     this.log("Pjax options", this.options)
 
     if (this.options.scrollRestoration && "scrollRestoration" in history) {
@@ -35,7 +37,6 @@ var Pjax = function(options) {
         opt.url = st.state.url
         opt.title = st.state.title
         opt.history = false
-        opt.requestOptions = {}
         opt.scrollPos = st.state.scrollPos
         if (st.state.uid < this.lastUid) {
           opt.backward = true
@@ -142,6 +143,10 @@ Pjax.prototype = {
   doRequest: require("./lib/send-request.js"),
 
   loadUrl: function(href, options) {
+    options = typeof options === "object" ?
+      extend({}, this.options, options) :
+      clone(this.options)
+
     this.log("load href", href, options)
 
     // Abort any previous request
@@ -150,8 +155,7 @@ Pjax.prototype = {
     trigger(document, "pjax:send", options)
 
     // Do the request
-    options.requestOptions.timeout = this.options.timeout
-    this.request = this.doRequest(href, options.requestOptions, function(html, request) {
+    this.request = this.doRequest(href, options, function(html, request) {
       // Fail if unable to load HTML via AJAX
       if (html === false) {
         trigger(document, "pjax:complete pjax:error", options)

lib/parse-options.js

@@ -1,6 +1,6 @@
 /* global _gaq: true, ga: true */
 
-var defaultSwitches = require("../switches")
+var defaultSwitches = require("./switches")
 
 module.exports = function(options) {
   options = options || {}
@@ -36,5 +36,5 @@ module.exports = function(options) {
     options.switches.body = defaultSwitches.switchElementsAlt
   }
 
-  this.options = options
+  return options
 }

lib/proto/attach-form.js

@@ -1,5 +1,5 @@
 var on = require("../events/on")
-var clone = require("../clone")
+var clone = require("../util/clone")
 
 var attrClick = "data-pjax-click-state"
 

lib/proto/attach-link.js

@@ -1,5 +1,5 @@
 var on = require("../events/on")
-var clone = require("../clone")
+var clone = require("../util/clone")
 
 var attrClick = "data-pjax-click-state"
 var attrKey = "data-pjax-keyup-state"
@@ -9,9 +9,6 @@ var linkAction = function(el, event) {
   // clone it so the changes don't persist
   var options = clone(this.options)
 
-  // Initialize requestOptions since loadUrl expects it to be an object
-  options.requestOptions = {}
-
   // Don’t break browser special behavior on links (like page in new window)
   if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
     el.setAttribute(attrClick, "modifier")

lib/send-request.js

@@ -3,10 +3,12 @@ var updateQueryString = require("./util/update-query-string");
 module.exports = function(location, options, callback) {
   options = options || {}
   var queryString
-  var requestMethod = (options.requestMethod || "GET").toUpperCase()
-  var requestParams = options.requestParams || null
+  var requestOptions = options.requestOptions || {}
+  var requestMethod = (requestOptions.requestMethod || "GET").toUpperCase()
+  var requestParams = requestOptions.requestParams || null
   var requestPayload = null
   var request = new XMLHttpRequest()
+  var timeout = options.timeout || 0
 
   request.onreadystatechange = function() {
     if (request.readyState === 4) {
@@ -51,12 +53,12 @@ module.exports = function(location, options, callback) {
   }
 
   // Add a timestamp as part of the query string if cache busting is enabled
-  if (this.options.cacheBust) {
+  if (options.cacheBust) {
     location = updateQueryString(location, "t", Date.now())
   }
 
   request.open(requestMethod, location, true)
-  request.timeout = options.timeout
+  request.timeout = timeout
   request.setRequestHeader("X-Requested-With", "XMLHttpRequest")
   request.setRequestHeader("X-PJAX", "true")
 

lib/util/extend.js

@@ -0,0 +1,21 @@
+module.exports = function(target) {
+  if (target == null) {
+    return target
+  }
+
+  var to = Object(target)
+
+  for (var i = 1; i < arguments.length; i++) {
+    var source = arguments[i]
+
+    if (source != null) {
+      for (var key in source) {
+        // Avoid bugs when hasOwnProperty is shadowed
+        if (Object.prototype.hasOwnProperty.call(source, key)) {
+          to[key] = source[key]
+        }
+      }
+    }
+  }
+  return to
+}

tests/lib/clone.js

@@ -1,17 +0,0 @@
-var tape = require("tape")
-
-var clone = require("../../lib/clone")
-
-tape("test clone method", function(t) {
-  var obj = {one: 1, two: 2}
-  var cloned = clone(obj)
-
-  t.notEqual(obj, cloned, "cloned object isn't the object")
-
-  t.same(obj, cloned, "cloned object have the same values than object")
-
-  cloned.tree = 3
-  t.notSame(obj, cloned, "modified cloned object haven't the same values than object")
-
-  t.end()
-})

tests/lib/parse-options.js

@@ -1,10 +1,10 @@
 var tape = require("tape")
 
-var parseOptions = require("../../../lib/proto/parse-options.js")
+var parseOptions = require("../../lib/parse-options.js")
 tape("test parse initalization options function", function(t) {
   t.test("- default options", function(t) {
     var pjax = {}
-    parseOptions.call(pjax, {})
+    pjax.options = parseOptions({})
 
     t.equal(pjax.options.elements, "a[href], form[action]")
     t.equal(pjax.options.selectors.length, 2, "selectors length")
@@ -30,7 +30,7 @@ tape("test parse initalization options function", function(t) {
   // verify analytics always ends up as a function even when passed not a function
   t.test("- analytics is a function", function(t) {
     var pjax = {}
-    parseOptions.call(pjax, {analytics: "some string"})
+    pjax.options = parseOptions({analytics: "some string"})
 
     t.deepEqual(typeof pjax.options.analytics, "function")
     t.end()
@@ -39,7 +39,7 @@ tape("test parse initalization options function", function(t) {
   // verify that the value false for scrollTo is not squashed
   t.test("- scrollTo remains false", function(t) {
     var pjax = {}
-    parseOptions.call(pjax, {scrollTo: false})
+    pjax.options = parseOptions({scrollTo: false})
 
     t.deepEqual(pjax.options.scrollTo, false)
     t.end()

tests/lib/send-request.js

@@ -18,12 +18,7 @@ tape("test xhr request", function(t) {
   var url = "https://httpbin.org/get"
 
   t.test("- request is made, gets a result, and is cache-busted", function(t) {
-    var requestCacheBust = sendRequest.bind({
-      options: {
-        cacheBust: true
-      }
-    })
-    var r = requestCacheBust(url, {}, function(result) {
+    var r = sendRequest(url, {cacheBust: true}, function(result) {
       t.equal(r.responseURL.indexOf("?"), url.length, "XHR URL is cache-busted when configured to be")
       try {
         result = JSON.parse(result)
@@ -36,12 +31,7 @@ tape("test xhr request", function(t) {
     })
   })
   t.test("- request is not cache-busted when configured not to be", function(t) {
-    var requestNoCacheBust = sendRequest.bind({
-      options: {
-        cacheBust: false
-      }
-    })
-    var r = requestNoCacheBust(url, {}, function() {
+    var r = sendRequest(url, {}, function() {
       t.equal(r.responseURL, url, "XHR URL is left untouched")
       t.end()
     })

tests/lib/util/clone.js

@@ -0,0 +1,17 @@
+var tape = require("tape")
+
+var clone = require("../../../lib/util/clone")
+
+tape("test clone method", function(t) {
+  var obj = {one: 1, two: 2}
+  var cloned = clone(obj)
+
+  t.notEqual(obj, cloned, "cloned object isn't the original object")
+
+  t.same(obj, cloned, "cloned object has the same values as original object")
+
+  cloned.three = 3
+  t.notSame(obj, cloned, "modified cloned object doesn't have the same values as original object")
+
+  t.end()
+})

tests/lib/util/extend.js

@@ -0,0 +1,16 @@
+var tape = require("tape")
+
+var extend = require("../../../lib/util/extend")
+
+tape("test extend method", function(t) {
+  var obj = {one: 1, two: 2}
+  var extended = extend({}, obj, {two: "two", three: 3})
+
+  t.notEqual(obj, extended, "extended object isn't the original object")
+
+  t.notSame(obj, extended, "extended object doesn't have the same values as original object")
+
+  t.notSame(obj.two, extended.two, "extended object value overwrites value from original object")
+
+  t.end()
+})