I tried to run the https://github.com/flatiron/director#client-side example to get familiar with director.js.
I am not able to setup the flatiron module on the client-side.
In my html page (say, <my_project>/page.html) I replaced the location of director.js with
a location of its counterpart from my project:
<my_project>/node_modules/flatiron/node_modules/director/lib/director.js
Upon loading the <my_project>/page.html page in the browser
I got errors: export and Router not defined.
First idea: After all, on the browser side there is no nodejs...
Ok, I thought that browserify could help me with it.
I generated a single 'browser-side' bundle (was it necessary?):
my_project> node node_modules/browserify/bin/cli.js node_modules/flatiron/node_modules/director/lib director.js -o cs_director.js
and I used it in the line: <script src="cs_director.js"></script>
The problem is that the error
Uncaught ReferenceError: Router is not defined
(anonymous function)
still appears so I guess the whole example will not work.
I am new to node/js and I am not sure if it makes sens what I have done in my case described above...
Does anybody how to solve it?
Or generally, how to use 'isomorphic' stuff on a browser-side?
The html examples on Github just refer to the same .js files
as server-side examples ...
Can you recommend any tutorials, examples?
Thanks,
-gvlax
You can find a browser-specific build of director here which has all of the server code stripped away.
Thanks DeadDEnD,
Now it works like a charm!
I have no idea how I could missed that info in readme ... I read the manual first, I swear:-)
Here is my sample code:
<!html>
<html>
<head>
<script src="director-1.0.7.min.js"></script>
<script>
var author = function () { console.log("author called.");},
books = function () { console.log("books called."); },
viewBook = function(bookId) { console.log("viewBook called."); };
var routes = {
'/author': author,
'/books': [books, function() { console.log("anonymous fun called."); }],
'/books/view/:bookId': viewBook
};
var router = Router(routes);
router.init();
</script>
</head>
<body>
Click me to call two functions at a time.
</body>
</html>
--gvlax
Related
I have started writing unit tests. I need to call a function in signup.js from another script, unittest.js. How can I do this?
Unittest.html would incorporate both scripts.
<html>
<head>
<script scr ="signup.js"></script>
<script src="unittest,js"></script>
</head>
</html>
This is signup.js, which I have to test.
YUI.use(function(Y){
demo : function(){
window.alert('hello);
}
});
unittest.js:
YUI.use(function(Y){
var abc = new Y.Test.case(
testOk : function(){
demo(); // Calling this function but not working
<Some_Assestion_Stuff_Here>
}
);
});
Your two scripts have both created a YUI sandbox. Neither sandbox share anything with the other, so you cannot achieve unit testing demo() like this.
What you can do is to register a module in signup.js and use it in unittest.js. See the following example: http://jsfiddle.net/746nq/
In signup.js, create the module:
// Create a YUI module in signup.js.
YUI.add('signup', function (Y) {
// Write your module code here, and make your module available on the Y
// object if desired.
Y.Signup = {
demo: function () {
window.alert("Demo!");
}
};
});
In unittest.js, use the module:
// Create a YUI sandbox in unittest.js and use our newly created module
YUI().use('signup', function (Y) {
Y.Signup.demo();
// assert stuff
});
Hope this helps you.
I am trying to update the bust variable in require.js so the browser is forced to re-fetch instead of loading resources from cache. I found here that several people have asked similar question. I am trying to try with a simple piece of code.
<html>
<head>
<title>jQuery+RequireJS Sample Page</title>
<!-- This is a special version of jQuery with RequireJS built-in -->
<script>
var require = {
urlArgs : "bust="+getRandom()
};
</script>
<script data-main="scripts/main" src="scripts/require-jquery.js"></script>
<script>
function getRandom() {
var buildNumber;
$.get("/resource/buildNumber", function(data) {
buildNumber = data;
});
return buildNumber;
}
</script>
</head>
<body>
<h1 id="heading">jQuery+RequireJS Sample Page</h1>
<p>Look at source or inspect the DOM to see how it works.</p>
</body>
I am trying to get the value of my build number from a properties file on the server. But I get the following error:
Uncaught ReferenceError: getRandom is not defined
So I tried this:
<script data-main="scripts/main" src="scripts/require-jquery.js"></script>
<script>
var require = {
urlArgs : "bust="+getRandom()
};
function getRandom() {
var buildNumber;
$.get("/resource/buildNumber", function(data) {
buildNumber = data;
});
return buildNumber;
}
</script>
But I get this error:
Uncaught TypeError: Property 'require' of object [object Object] is not a function
It looks like the bust variable has to be set even before require-jquery.js is declared but how do I access server side APIs without access to jquery libraries? I want to update the bust variable for every build.
Any pointers in the right directions would be really appreciated.
Thanks.
My project includes the following files:
./index.html
./js/main.js
./js/vendor/require.js
./js/viewmodel/vm.js
The index.html has the following relevant snippet:
<script data-main="js/main.js" src="js/vendor/require.js"></script>
<script type="text/javascript">
require(['viewmodel/vm', 'ko'],
function(viewmodel, ko) {
ko.applyBindings(viewmodel);
}
);
</script>
The js/main.js file is as follows:
var root = this;
define('jquery', ['http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.3.js'], function () { return root.$; });
define('ko', ['http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.1.0.js'], function (ko) { return ko; });
The js/viewmodel/vm.js file...
define(['jquery', 'ko'],
function($, ko) {
return {
subject: 'world',
greeting: 'hello'
}
}
);
When you open a browser to index.html, then the browser tries to load a file called js/ko.js instead of using the module defined in main.js. It seems like the js file pointed to by the data-main attribute is not guaranteed to run before dependency resolution. This does not seem correct to me since one purpose of the data-main js file is to define require configuration (i.e. path, shim, etc). I am using require v2.1.2.
This works perfectly fine if I copy the contents of my main.js file into the script block in index.html. By "perfectly fine" I mean that it resolved ko to be a module and finds the appropriate CDN link to resolve ko instead of trying to download ./js/ko.js.
to use the data-main attribute for configuring your whole application, it is necessary that it is the single entry point for all your code.
your 2nd script block breaks this requirement by providing a 2nd entry point. since these entry points will resolve independently of each other (and asynchronously), you cannot rely on one to affect the other.
to resolve it, refactor your code in a way that provides a single entry point to your application and do your configuration via this entry point.
That's because requirejs sets the async. Attribute on the script.
The boolean async attribute on script elements allows the external
JavaScript file to run when it's available, without delaying page load
first.
This means that both scripts are loaded and evaluated parallel, so none of the two scripts can access methods or functions from the other one.
If you want to define requirejs variables in one script you mustn't load that script with require js.
For me there are three possibilities how you can solve that problem:
Add the content of main.js to your page (as you mention)
Load the main.js file without requirejs as normal script
Define the require config before loading the scripts (link to requirejs docu )
I had the same problem. The architecture of the site that i was working was components that was loading asynchronous at each part of the page.
Each component has its own html, css, and js code.
So, my solution is to keep a guard function for all the required dependency code, to protect them from running before the main javascript file:
index.html
<head>
<script type="text/javascript">
window.BeforeMainGuard = {
beforeMainLoadedFunctions: [],
hasMainLoaded: false,
guard: function( func ) {
console.assert( typeof func === 'function' );
if( this.hasMainLoaded ) {
func();
}else {
this.beforeMainLoadedFunctions.push( func );
}
},
onMainLoaded: function() {
for( var i = 0; i<this.beforeMainLoadedFunctions.length; ++i ) {
var beforeMainLoadedFunction = this.beforeMainLoadedFunctions[i];
beforeMainLoadedFunction();
}
this.beforeMainLoadedFunctions = null;
this.hasMainLoaded = true;
}
};
</script>
<script data-main="js/main.js" src="js/vendor/require.js"></script>
<script type="text/javascript">
window.BeforeMainGuard.guard( function() {
require(['viewmodel/vm', 'ko'],
function(viewmodel, ko) {
ko.applyBindings(viewmodel);
}
);
});
</script>
</head>
js/main.js
require.config({
// your config
});
require( [ 'AppLogic' ], function( AppLogic ){
AppLogic.Init();
window.BeforeMainGuard.onMainLoaded();
} );
codes in file main.js is like this:
phantom.injectJs("libs/require-1.0.7.js");
require.config(
{
baseUrl: ""
}
);
require([], function(){});
when i run "phantomjs main.js" in the commandline, requirejs doesn't work well in the main.js. I know how to use requirejs in the page running in the browser(including phantomjs' way: page.open(url, callback)), but not like above. I tries using requirejs like the main.js, it is a popular problem, i think. Thank you!
I just struggled for some time. My solution is not clean, but it works, and I'm happy with that due to the unfinished api documentation from phantomjs.
Wordy explanation
You need three files. One is your amd phantomjs test file which I'll call "amd.js". The second is your html page to load which I'll name "amd.html". Finally the browser test which I called "amdTestModule.js".
In amd.html, declare your script tag per normal:
<script data-main="amdTestModule.js" src="require.js"></script>
In your phantomjs test file, this is where it gets hacky. Create your page, and load in the 'fs' module. This allows you to open a relative file path.
var page = require('webpage').create();
var fs = require('fs');
page.open('file://' + fs.absolute('tests/amd.html'));
Now since requirejs loads files asynchronously, we can't just pass in a callback into page.open and expect things to go smoothly. We need some way to either
1) Test our module in the browser and communicate the result back to our phantomjs context. Or
2) Tell our phantomjs context that upon loading all the resources, to run a test.
#1 was simpler for my case. I accomplished this via:
page.onConsoleMessage = function(msg) {
msg = msg.split('=');
if (msg[1] === 'success') {
console.log('amd test successful');
} else {
console.log('amd test failed');
}
phantom.exit();
};
**See full code below for my console.log message.
Now phantomjs apparently has an event api built in but it is undocumented. I was also successfully able to get request/response messages from their page.onResourceReceived and page.onResourceRequested - meaning you can debug when all your required modules are loaded. To communicate my test result however, I just used console.log.
Now what happens if the console.log message is never ran? The only way I could think of resolving this was to use setTimeout
setTimeout(function() {
console.log('amd test failed - timeout');
phantom.exit();
}, 500);
That should do it!
Full Code
directory structure
/projectRoot
/tests
- amd.js
- amdTestModule.js
- amd.html
- require.js (which I symlinked)
- <dependencies> (also symlinked)
amd.js
'use strict';
var page = require('webpage').create();
var fs = require('fs');
/*
page.onResourceRequested = function(req) {
console.log('\n');
console.log('REQUEST');
console.log(JSON.stringify(req, null, 4));
console.log('\n');
};
page.onResourceReceived = function(response) {
console.log('\n');
console.log('RESPONSE');
console.log('Response (#' + response.id + ', stage "' + response.stage + '"): ' + JSON.stringify(response, null, 4));
console.log('\n');
};
*/
page.onConsoleMessage = function(msg) {
msg = msg.split('=');
if (msg[1] === 'success') {
console.log('amd test successful');
} else {
console.log('amd test failed');
}
phantom.exit();
};
page.open('file://' + fs.absolute('tests/amd.html'));
setTimeout(function() {
console.log('amd test failed - timeout');
phantom.exit();
}, 500);
amd.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<script data-main='amdTestModule.js' src='require.js'></script>
</body>
</html>
amdTestModule.js
require([<dependencies>], function(<dependencies>) {
...
console.log(
(<test>) ? "test=success" : "test=failed"
);
});
console
$ phantomjs tests/amd.js
amd test successful
you are misunderstanding webpage.injectJs()
it's for injecting scripts into the page you are loading, not into the phantomjs runtime environment.
So using .injectJs() is making requirejs load up into your page, not into phantomjs.exe.
That said, phantomjs's runtime environment has an aproximation of commonjs. RequireJs will not run on there by default. If you felt especially (VERY) motivated, you could attempt porting the require-shim made for nodejs, but it doesn't work out of the box, and would require an incredibly deep understanding of the runtimes. for more details: http://requirejs.org/docs/node.html
a better idea:
probably you should make sure you have commonjs versions of your javascript you wish to run. i personally write my code in typescript so i can build for either commonjs or amd. i use commonjs for phantomjs code, and amd for nodejs and browser.
I am trying to get get zombie.js to activate a link that uses javascript. The page I am testing it on is:
<html>
<body>
<div id="test123">
START_TEXT
</div>
GO<br/>
<script type="text/javascript">
go = function() {
var el = document.getElementById("test123");
el.innerHTML = "CHANGED";
}
</script>
</body>
</html>
The Script I am using is:
var zombie = require("zombie");
var browser = new zombie.Browser;
browser.visit( "http://localhost:8000/testpage.html",
function() {
browser.clickLink("GO", function(e, browser, status) {
var temp = browser.text("div#test123");
console.log("content:", temp);
});
});
I get the error message:
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
Error: Cannot load resource: javascript:go()
at History._resource (/home/julian/temp/node_modules/zombie/lib/zombie/history.coffee:75:15)
at History._pageChanged (/home/julian/temp/node_modules/zombie/lib/zombie/history.coffee:60:21)
at History._assign (/home/julian/temp/node_modules/zombie/lib/zombie/history.coffee:213:19)
at Object.location (/home/julian/temp/node_modules/zombie/lib/zombie/history.coffee:51:24)
at Object.click (/home/julian/temp/node_modules/zombie/lib/zombie/jsdom_patches.coffee:31:59)
at Object.dispatchEvent (/home/julian/temp/node_modules/zombie/node_modules/jsdom/lib/jsdom/level2/html.js:480:47)
at /home/julian/temp/node_modules/zombie/lib/zombie/eventloop.coffee:130:16
at EventLoop.perform (/home/julian/temp/node_modules/zombie/lib/zombie/eventloop.coffee:121:7)
at EventLoop.dispatch (/home/julian/temp/node_modules/zombie/lib/zombie/eventloop.coffee:129:19)
at Browser.dispatchEvent (/home/julian/temp/node_modules/zombie/lib/zombie/browser.coffee:220:30)
When I use
browser.evaluate("go()")
it works.
What am I missing?
Zombie.js doesn't handle links with "javascript:" on href (at the time of this writing).
I fixed it by adding 3 lines to the source code. Look for /node_modules/zombie/lib/zombie/history.coffee and add the 3 lines commented with FIX (beware that in .coffee you must respect indentation, ie. use 2 spaces):
# Location uses this to move to a new URL.
_assign: (url)->
url = #_resolve(url)
# FIX: support for javascript: protocol href
if url.indexOf("javascript:")==0
#_browser.evaluate(url.substr("javascript:".length))
return
was = #_stack[#_index]?.url # before we destroy stack
#_stack = #_stack[0..#_index]
#_stack[++#_index] = new Entry(this, url)
#_pageChanged was
I probably should fork zombie.js on github.com and put this into a Pull Request, but until then you are welcome to do use this snippet, or make that pull request before me.
Well it doesn't seem to understand javascript:code hrefs. Perhaps you can get the url, remove the javascript:-section and evaluate it?
Disclaimer: I haven't used zombie.js myself yet.
The zombie.js API says it takes a CSS selector or the link text as the first parameter for browser.clickLink(). So your code should work.
But try adding an id to the link, if you have control over the page, and using a CSS selector
browser.clickLink('#thelink', function(e, browser, status) {
var temp = browser.text("div#test123");
console.log("content:", temp);
});