I can't seem to get jsdom to execute external scripts and I can't seem to find any concrete examples. I don't get any error when I call my testing function, but nothing happens.
This is my code:
var window = jsdom.jsdom(body).createWindow();
jsdom.jQueryify(window, './lib/jquery.js', function () {
console.log(window.$("#a1").text());
window.testing();
console.log(window.$("#a2").text());
});
This is the html its loading:
<html>
<head>
<script type="text/javascript" src="stuff.js"></script>
</head>
<body>
Hi there
<div id="a1">
</div>
<div id="a2">
</div>
</body>
</html>
My testing function:
function testing() {
var a2 = document.getElementById("a2");
a2.innerHTML = 'Second div';
console.log("executed");
}
Check out the jsdom docs
Try this before the rest of your code:
require('jsdom').defaultDocumentFeatures = {
FetchExternalResources : ['script'],
ProcessExternalResources : ['script'],
MutationEvents : '2.0',
QuerySelector : false
}
var window = jsdom.jsdom(body).createWindow();
jsdom.jQueryify(window, './lib/jquery.js', function () {
console.log(window.$("#a1").text());
window.testing();
console.log(window.$("#a2").text());
});
/fyi #node.js IRC welcomes you: http://bit.ly/nodeIRC
Related
I have a module i18n.js which I import in my home.html, like this:
<html>
<head></head>
<body>
<script type="module" src="../js/lib/i18n.js"></script>
</body>
</html>
Inside the i18n.js module, I do the following:
export const t = () => {};
//
// Global scope
//
window.t = t;
I understand that accessing the global window object is the way to go in order to be able to call a method from other file inside an HTML page. But... why is this code not working?
<html>
<head></head>
<body>
<p><script>t("title")</script></p>
<script type="module" src="../js/lib/i18n.js"></script>
</body>
</html>
I get the error:
Uncaught ReferenceError: t is not defined
Because you're trying to execute t before it's available on the window, you get an error but running the function through the onload as #Rajesh suggested works properly.
const t = () => {
const pTitle = document.getElementById('pTitle');
if (pTitle){
pTitle.textContent = 'Hello World!';
}
};
//
// Global scope
//
window.t = t;
export {
t
};
<html>
<head></head>
<body onload="t()">
<p id="pTitle"> </p>
<script type="module" src="./src/js/i18n.js"></script>
</body>
</html>
I am trying to use exif.js on my HTML page, but I don't think I'm referencing the exif.js file correctly, as window.onload = getExif returns an error saying it's undefined.
I have tried adding <script src="exif.js type="text/javascript"></script> to my HTML file and referencing my other file with <script src="myscript.js" type="text/javascript"></script> as well. It still doesn't seem to be working.
HTML:
<html>
<head>
<script src="exif.js" type="text/javascript"></script>
<script src="myscript.js" type="text/javascript"></script>
</head>
<body>
<img src="myimage.png" alt="" id="image">
<div>
<span id="metadata"></span>
</div>
</body>
</html>
Javascript:
window.onload = getExif;
img = document.getElementById("image")
EXIF.getData(img, function() {
var allMetaData = EXIF.pretty(this);
var allMetaDataSpan = document.getElementById("metadata");
allMetaDataSpan.innerHTML = JSON.stringify(allMetaData,null, "\t");
});
The error I got was Uncaught ReferenceError: getExif is not defined. I'm not sure if I'm doing something wrong or not because everything looks good to me. Any help would be greatly appreciated.
You have no function named getExif defined. It's not something special exported or defined by exif.js, but simply a pattern they were following in the documentation examples. I imagine what you were going for is:
window.onload = getExif;
function getExif() {
var img = document.getElementById("image");
EXIF.getData(img, function() {
var allMetaData = EXIF.pretty(this);
var allMetaDataSpan = document.getElementById("metadata");
allMetaDataSpan.innerHTML = JSON.stringify(allMetaData,null, "\t");
});
}
I'm using QUnit for unit testing js and jquery.
My HTML looks like this:
<!DOCTYPE html>
<html>
<head>
<title>QUnit Test Suite</title>
<script src="../lib/jquery.js"></script>
<link rel="stylesheet" href="http://code.jquery.com/qunit/qunit-1.16.0.css" type="text/css" media="screen">
<script type="text/javascript" src="http://code.jquery.com/qunit/qunit-1.16.0.js"></script>
<!--This is where I may have to add startPage.html--->
<script src="../login.js"></script>
<script src="../test/myTests.js"></script>
</head>
<body>
<div id="qunit"></div>
<div id="qunit-fixture"></div>
</body>
</html>
Currently, I'm adding login.js as shown and I'm getting references correctly to objects defined in login.js.
However, functions in login.js contains references to some dom elements defined in startPage.html which is located elsewhere.
So, if I say $('#login-btn'), it is throwing an error. Is there any way to fix this?
Can I
(a) refer to startPage.html to my qunit page given above?
(b) refer to or load startPage.html in the file where I'm running tests (myTests.js):
QUnit.test( "a test", function( assert ) {
assert.equal( 1, "1", "String '1' and number 1 have the same value" );//works
assert.equal( login.abc, "abc", "Abc" );//works with attributes
assert.equal(($("#userid").val()),'', 'Userid field is present');//fails
assert.equal( login.ValidUserId(), true, "ValidUserId" );//fails with functions
});
Does QUnit provide any method to load Html/php files so they'll be defined prior to testing. Like 'fixtures' in jasmine?
EDIT: Please also tell what to do in case I have startPage.php
There are a couple of ways you can do this. The simplest is just to use the built-in QUnit "fixtures" element. In your QUnit HTML file, simply add any HTML you want in the div with the id of qunit-fixture. Any HTML you put in there will be reset to what it was on load before each test (automatically).
<html>
...
<body>
<div id='qunit'></div>
<div id='qunit-fixture'>
<!-- everything in here is reset before each test -->
<form>
<input id='userid' type='text'>
<input id='login-btn' type='submit'>
</form>
</div>
</body>
</html>
Note that the HTML in the fixture doesn't really have to match what you have in production, but obviously you can do that. Really, you should just be adding the minimal necessary HTML so that you can minimize any side effects on your tests.
The second option is to actually pull in the HTML from that login page and delay the start of the QUnit tests until the HTML loading is complete:
<html>
<head>
...
<script type="text/javascript" src="http://code.jquery.com/qunit/qunit-1.16.0.js"></script>
<script>
// tell QUnit you're not ready to start right away...
QUnit.config.autostart = false;
$.ajax({
url: '/path/to/startPage.html',
dataType: 'html',
success: function(html) {
// find specific elements you want...
var elem = $(html).find(...);
$('#qunit-fixture').append(elem);
QUnit.start(); // ...tell QUnit you're ready to go
}
});
</script>
...
</head>
...
</html>
Another way to do this without using jquery is as follows
QUnit.config.autostart = false;
window.onload = function() {
var xhr = new XMLHttpRequest();
if (xhr) {
xhr.onloadend = function () {
if(xhr.status == 200) {
var txt = xhr.responseText;
var start = txt.indexOf('<body>')+6;
var end = txt.indexOf('</body>');;
var body_text = txt.substring(start, end);
var qunit_fixture_body = document.getElementById('qunit-fixture');
qunit_fixture_body.innerHTML = body_text;
}
QUnit.start();
}
xhr.open("GET", "index.html");
xhr.send();
} else {
QUnit.start(); //If getting the html file from server fails run tests and fail anyway
}
}
I created a custom element called "memory-box" like the below code.
Please pay attention to the function "logthis" which is in "memory-box-template".
memory-box.html
<template id="memory-box-template">
<input id="memory-box" type="form" />
<input type="button" id="testbutton" />
<script type="text/javascript">
function logthis(me){
console.log(me);
}
</script>
</template>
<script type="text/javascript">
(function() {
var thisDoc = document.currentScript.ownerDocument;
var storage = localStorage;
var proto = Object.create(HTMLElement.prototype, {
createdCallback: {
value: function() {
var temp = thisDoc.querySelector('#memory-box-template');
var con = document.importNode(temp.content, true);
this.createShadowRoot().appendChild(con);
var input = this.querySelector('::shadow #memory-box');
var data = storage.getItem(this.id);
input.value = data;
input.addEventListener('input', saveData.bind(input, this.id));
}
},
});
document.registerElement('memory-box', {
prototype: proto
});
function saveData(id, e) {
storage.setItem(id, this.value);
}
})();
</script>
Now, I uses the custom element "memory-box" like the below code.
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link rel="import" href="/html/memory-box.html">
</head>
<body>
<div><memory-box id="memory1"></memory-box></div>
<div><memory-box id="memory2"></memory-box></div>
<div><memory-box id="memory3"></memory-box></div>
<div><memory-box id="memory4"></memory-box></div>
</body>
<script type="text/javascript">
logthis(this);
</script>
</html>
As you can see, I putted a script in the index.html and called the function "logthis" just because I was curious. And no error occurred.
Why?
The function "logthis" is in each shadow doms. It's supposed not able to be called outside the shadow dom, I think.
As explained here, while the HTML within Shadow DOM is encapsulated, any JavaScript is NOT -- it is in the global scope, unless you utilize specific javascript techniques (namescaping, IIFE) to do so.
Hope this helps,
Jonathan Dodd
Hey I am completly new to Handlebars.js and almost new to JavaScript itself.
So I tried to go through the following tut: http://coenraets.org/blog/phonegap-tutorial/
I completed Part 5 and wanted to test the app in the browser. But the page ist blank. Does the browser recognize handlebars.js by himself and renders the handlebars template automatically? Or why do I receive a blank page?
I hope the questions is not to basic, however I have no clue how to proceed or where my error lies.
index.html:
<html>
<body>
<script id="home-tpl" type="text/x-handlebars-template">
<div class='header'><h1>Home</h1></div>
<div class='search-bar'><input class='search-key' type="text"/></div>
<ul class='employee-list'></ul>
</script>
<script id="employee-li-tpl" type="text/x-handlebars-template">
{{#.}}
<li>{{this.firstName}} {{this.lastName}}<br/>{{this.title}}</li>
{{/.}}
</script>
<script src="lib/jquery-1.8.2.min.js"></script>
<script src="js/storage/memory-store.js"></script>
<script src="js/main.js"></script>
<script src="lib/handlebars.js"></script>
</body>
main.js:
var app = {
findByName: function() {
var self = this;
this.store.findByName($('.search-key').val(), function(employees) {
$('.employee-list').html(self.employeeLiTpl(employees));
});
},
initialize: function() {
var self = this;
this.store = new MemoryStore(function() {
self.renderHomeView();
});
this.homeTpl = Handlebars.compile($("#home-tpl").html());
this.employeeLiTpl = Handlebars.compile($("#employee-li-tpl").html());
},
renderHomeView: function() {
$('body').html(this.homeTpl());
$('.search-key').on('keyup', $.proxy(this.findByName, this));
},
showAlert: function (message, title) {
if (navigator.notification) {
navigator.notification.alert(message, null, title, 'OK');
} else {
alert(title ? (title + ": " + message) : message);
}
},
};
app.initialize();
I get the follwoing errors in main.js:
ln. 15: Uncaught ReferenceError: Handlebars is not defined
ln 20. :Uncaught TypeError: Object # has no method 'homeTpl'
Kind regards,
Snafu
Move your handlebars.js above your main.js script tags.
I did the above change...which seemed quite logical. However, the above solution didn't work.
I added the below
this.homeTpl = Handlebars.compile($("#home-tpl").html());
this.employeeLiTpl = Handlebars.compile($("#employee-li-tpl").html());
in the renderHomeView function... Works well for me..... :)
renderHomeView: function() {
this.homeTpl = Handlebars.compile($("#home-tpl").html());
this.employeeLiTpl = Handlebars.compile($("#employee-li-tpl").html());
$('body').html ( this.homeTpl());
$('.search-key').on('keyup', $.proxy(this.findByName, this));
}