jquery not working well on node-webkit - javascript

I am practicing node-webkit as a nodejs beginner.
My main page is a simple html page including a main.js script
I've installed jquery using npm install jquery
index.html
<!-- index.html -->
...
<script src="js/main.js"></script>
</head>
<body>
<div id="demo">Hi! </div>
</body>
</html>
main.js
// main.js
const $ = require('jquery')
$(document).ready(function () {
$('#demo').click(function () {
$(this).text($(this).text() + 'Hi! ')
})
})
If I load jquery in my index.html like <script src="path/to/jquery.js"></script> it works well, but if I require jquery in my main.js it doesn't!
I've already tested:
main.js is properly including and working with native js methods (like document.getElementById('demo').onclick = ...)
Other node modules or libraries such as vue, lodash or natives like fs, url work well. So require function works good.
While I'm requiring jquery as above, inline <script>s doesn't work as well.
Also I realized $(document).ready(...) works! But the real problem is that $('#demo') is undefined! (I checked the console-I'm using SDK version of node-webkit)
I don't know if it's because of node-webkit or something else I'm missing?

found the solution,
I should define jquery like this:
window.$ = window.jQuery = require('jquery')
this is simply because of variable scopes in ECMAS
so if I define it like this, I can use it everywhere

Related

jQuery not working in html file (JS LINT errors such as '$' was used before it was defined)

I am using HTML, CSS, and JS. I am trying to use the JQuery library but it is not being recognized by my html file. I am inserting it above my external .js file, so I don't think that is the issue. Here is what is in my HTML file:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="js/tether.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/main.js"></script>
This is what is in my JS file:
$(document).ready(function() {
$(window).scroll(function() {
if ($(window).scrollTop() > 970) {
$('.navbar').addClass('navbar-fixed-top');
}
});
});
My code editor is throwing errors when I save this js file because of errors like:
-'$' was used before it was defined.
-Expected exactly one space between 'fucntion and '('
Anyone know what the issue might be? Thanks in advance.
This might not be the issue, but you may wish to attempt to load the jquery file by HTTPS (https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js), especially if you are running your site on an HTTPS connection.
Otherwise, it seems to work when I test it:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$(window).scroll(function() {
if ($(window).scrollTop() > 970) {
$('.navbar').addClass('navbar-fixed-top');
}
});
console.log("done!")
});
</script>
The problem is in your <script> tag, as #B.Fleming said maybe the HTTPS protocol. This tag is working:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
put this in top of your code where you are using jQuery
/* global $ */
alternativ is prefixing it with window
I don't like using the global $ sign cuz other libs are using it as well. what i usably dose is getting the $ from the closure function like this
jQuery(function($){
// document is ready, You may use jquery here and now
$('body')
})
and to get away with jQuery is not defined use window.jQuery instead
ps, always load stuff from https when possible

Import monaco editor using require js

I have installed monaco-editor using
npm install monaco-editor
now I want to require in my js file
so I have tried to require using
var monaco = require('monaco-editor');
but it is giving me module not found error.
Is there wrong I am doing?
They just released ESM distribution which is compatible with webpack etc. Check out the docs here.
Also there are many examples for using monaco with webpack, parcel an so on. See all.
Monaco-editor uses a custom AMD style module loader. the loader.js will result in the global require being set to Monaco-editor's loader.
The samples GitHub has many examples of using the editor in different contexts.
Check out how they solve your problem in the Electorn samples index.html. After persisting the Monaco-editor custom loader you would use it like in most of the examples out there. It is an AMD style loader so the syntax differs from node var me = require('monaco') . I am not sure if it is possible to use like node loader but after loading loader.js and persisting the require to some variable such as amdRequire you will use such as:
amdRequire(['vs/editor/editor.main'], function ()
{
// your code using monaco ns here
monaco.editor.create( document.getElementById('elementId'), {} );
})
In my case, I'm trying to load Monaco Editor in nw.js app which had require.js.
Usually Monaco Editor examples recommends using its 'Loader.js'. But if you already have another amd loader (ex: require.js), then you don't need to include & use Monaco's Loader.js. By this Github comment I got to know the Monaco's Loader.js will not do anything if it detects another amd loader.
This official sample might be useful.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
</head>
<body>
<h2>Monaco Editor Sample - Loading with requirejs</h2>
<div id="container" style="width: 800px; height: 600px; border: 1px solid grey"></div>
<script
src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.5/require.min.js"
integrity="sha256-0SGl1PJNDyJwcV5T+weg2zpEMrh7xvlwO4oXgvZCeZk="
crossorigin="anonymous"
></script>
<script>
require.config({ paths: { vs: '../node_modules/monaco-editor/min/vs' } });
require(['vs/editor/editor.main'], function () {
var editor = monaco.editor.create(document.getElementById('container'), {
value: ['function x() {', '\tconsole.log("Hello world!");', '}'].join('\n'),
language: 'javascript'
});
});
</script>
</body>
</html>

How do I include jQuery code in my node.js web app?

so I've been working on a (fairly simple) RESTful app using node.js, and I've made it towards the very last bit, now the only bit missing is using jQuery to manipulate the html page so I can edit the content of the html - and it's driving me absolutely mad.
I took the try.jquery.com tutorial, and it was pretty smooth; I'd by no means call myself a master of jquery, but I have very little trouble writing the code for basic html manipulation, except I never really considered where the jquery code would go. I've tried a bunch of different stuff and only one (really inconvenient) way has worked, so I was wondering if I could get some clarification.
(Note: all the js files are in the root folder, and index.html is in root/public; and I'm basically just running app.js through npm/package.json)
I've tried including the jQuery code in the main app.js file:
app.js
//some imports/requires here
var $ = require('jquery');
//more imports/requires here
//error; document is undefined
$(document).ready($('h1').text('Im Here');
app.get('/', function (req, res) {
res.sendFile(__dirname+'/public/index.html');
});
index.html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
<title>Inspiratorator</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
<script="../app.js"></script>
I've tried including the jQuery code in its own file (tried just letting the code sit in the js file, and tried exporting the code as a function and calling it from app.js - both did nothing):
jusQueryin.js
var $ = require('jQuery'); //tried with and without this
$(document).ready(function () {
$(' button ').on( 'click', $('h1').text("I'm here") );
console.log('kpa');
});
index.html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
<title>Inspiratorator</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
<script="../jusQueryin.js"></script>
I've also tried (this worked, but I don't know how I would deal with the code in here from other .js file, if it is possible):
index.html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
<title>Inspiratorator</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
<script>
$(document).ready(function () {
$(' button ').on( 'click', $('h1').text("I'm here") );
console.log('kpa');
});
</script>
I've also tried different variations(i.e. including the 2nd part of the ready function in a function (or not), using an onClick event inside the dom.ready function, etc..), but the only one that worked was the last approach
Ideally, I'd like to be able to use the jQuery code inside app.js, less ideally would be in its own file; or if I have to include it inside the html file for some reason, I would at least need to be able to communicate with the code in the script block so that I can give it info from the database and so on.
Remeber one thing jQuery needs a window object to work. The first functionality of jquery is as dom query, dom is within a window object. As a result you must load the jquery and attach it to a window object.
As a node app you will have a browser window as a view to your app. Try adding jquery to that window from a CDN, add your requires there, voila the containing scope(window) which contains jquery now as global passes it also to the newly required file.
Error: jQuery requires a window with a document
index.html
<script>
window.$ = window.jQuery = require('./node_modules/jquery');
</script>
<script>
var UI = require('./controllers/UI');
UI.init(window);
</script>
Now var UI, which is a module in my case, contains

RequireJS, jquery still undefined

I know this has already been discussed, but after searching for a while I can't figure out why my small setup does not load jquery correctly with requireJS.
I'm running a small sample html page from 'file://' and try to load 2 modules with a call to require:
jquery
a custom module I wrote
If my custom module loads correctly (i can use it with its alias in the require call, jquery is always undefined)
I tried to setup paths in require.config, as well as shim (exporting '$' or 'jQuery') but it does not work.
The only way i can get jquery to correctly load, is removing all paths definition and naming the jquery file on my filesystem 'jquery.js'
Here is my config:
main.js:
require.config({
baseUrl: 'scripts',
paths: {
jquery: 'jquery-2.1.3.min' //does not work
//jquery: 'http://code.jquery.com/jquery-2.1.3.min.js' //does not work either
}
});
console.log( "main.js is loaded" ); //this is correctly ouputed to the console
test.html:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<!--
... page content ...
-->
<!-- main.js is loaded from data-main -->
<script data-main="scripts/main" src="scripts/require.js"></script>
<script type='text/javascript'>
require(
['jquery','custom'],
function($, Custom){
console.info('$:');
console.info($); //outputs undefined
console.info('Custom:');
console.info(Custom); //outputs my custom object
});
</script>
</body>
</html>
Once again, it works if I remove all paths definition for jquery, and simply name my jquery js file 'jquery.js' but this is sloppy.
Can somebody points me on the right way to go ?
The problem is that you load your RequireJS configuration, which is in main, through data-main. The data-main attribute merely tells RequireJS to load the module listed there but the loading is still asynchronous, so main may load after RequireJS tries to load jQuery. When this happens, RequireJS fails to find jQuery and $ is undefined. (Incidentally, I'd suggest setting enforceDefine to true in your RequireJS configuration so that you get an error message telling you when a module has not loaded. That's a better clue than having an undefined symbol.)
One solution would be to move your configuration outside of main. So you remove it from main and add it to a script element in front of the one loading RequireJS:
<script>
// RequireJS will use the value of `require` as its configuration.
require = {
baseUrl: 'scripts',
paths: {
jquery: 'jquery-2.1.3.min'
},
enforceDefine: true
};
</script>
<script src="scripts/require.js"></script>
Or you can nest require calls to force main to load before any other module:
require(['main'], function () {
require(['jquery','custom'], ...
});

jquery.min.js conflicts with jquery-1.4.4

I have both the .js files in single page which carrys out different functions. in jquery.min.js
$(document).ready(function() {
$.timeliner({
startOpen:['#19550828EX', '#19630828EX']
});
$.timeliner({
timelineContainer: '#timelineContainer_2'
});
// Colorbox Modal
$(".CBmodal").colorbox({inline:true, initialWidth:100, maxWidth:682, initialHeight:100, transition:"elastic",speed:750});
});
In jquery-1.4.4 I have a rotating wheel function.
What Should I do , so that both the functions would work in that single page??
if you need to use multiple files on same page.
<script type="text/javascript" src="jquery-1.4.4.js"></script>
<script> $144 = jQuery.noConflict(true);</script>
<script type="text/javascript" src="jquery-1.6.2.js"></script>
Now to access version 1.4.4 you need to use $144 like
$144('.element').val();
while $ for version 1.6.2.
jQuery min is a minimized file of jquery (it also has a version). jQuery 1.4.4 is the non-minimized file of jquery version 1.4.4.
You need to ask youself:
which jquery version do I need for my application?
Do I need the min version or not.
At the end choose one jQuery file and don't add two if it's not something you really need.

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