Open Learning Library - Javascript Tutorials

Javascript Tutorials

JavaScript is the most popular client side scripting language used for website development. In this E-Classroom you will find well organized content to learn JavaScript from scratch and practical examples on how to use it for website development.

Discussions

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Programmatically change the src of an img tag
How can I change the src attribute of an img tag using javascript?

javascript html5 image src 2018-03-20 7:43:10
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Get the size of the screen, current web page and browser window
How can I get windowWidth, windowHeight, pageWidth, pageHeight, screenWidth, screenHeight, pageX, pa ...

javascript jquery layout cross-browser 2018-03-20 7:42:52
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How to pass parameters in GET requests with jQuery
How should I be passing query string values in a jQuery Ajax request? I currently do them as follows ...

javascript jquery ajax get 2018-03-20 7:43:30
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Pagination on a list using ng-repeat
I'm trying to add pages to my list. I followed the AngularJS tutorial, the one about smartphones and ...

javascript angularjs paginate 2018-03-20 7:44:28
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Allow Google Chrome to use XMLHttpRequest to load a URL from a local file
When trying to do a HTTP request using XMLHttpRequest from a local file, it basically fails due to A ...

javascript jquery google-chrome xmlhttprequest local-files 2018-03-20 7:45:54
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Regular Expression to find a string included between two characters while EXCLUDING the delimiters
I need to extract from a string a set of characters which are included between two delimiters, witho ...

javascript c-sharp php regex 2018-03-20 7:43:49
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Getting full JS autocompletion under Sublime Text
I just installed the Sublime Text under Windows Vista, and even following the advice given in this p ...

javascript sublimetext2 2018-03-20 7:45:32
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How to unset a JavaScript variable?
I have a global variable in JavaScript (actually a window property, but I don't think it matters) wh ...

javascript global-variables undefined 2018-03-20 7:43:11
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css: how to remove pseudo elements (after, before, ...)
I would like to use a switch for the layout of paragraph tags on a webpage. I use the after pseudoe ...

javascript html css pseudo-element 2018-03-20 7:46:19
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jQuery lose focus event
I'm trying to show up a container if a input field gets the focus and - that's the actual problem - ...

javascript jquery javascript-events focus 2018-03-20 7:44:09
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window.onload vs document.onload
Which is more widely supported: window.onload or document.onload?

javascript javascript-events 2018-03-20 7:42:52
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location.host vs location.hostname and cross-browser compatibility?
Which one of these is the most effective vs checking if the user agent is accessing via the correct ...

javascript html window location host 2018-03-20 7:44:48
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React after render code?
I have an app where I need to set the height of an element (lets say app-content) dynamically. It ta ...

javascript reactjs 2018-03-20 7:45:32
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Get the contents of a table row with a button click
I need to extract the details of each column in my table. For example, column Name/Nr.. The table ...

javascript jquery button onclick html-table 2018-03-20 7:44:09
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Remove all child elements of a DOM node in JavaScript
How would I go about removing all of the child elements of a DOM node in JavaScript? Say I have the ...

javascript dom 2018-03-20 7:43:11
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Adding items to an object through the .push() method
I'm doing a loop through few input elements of 'checkbox' type. After that, I'm adding values and ch ...

javascript jquery arrays push 2018-03-20 7:43:49
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Javascript require() function giving ReferenceError: require is not defined
Basically, I am using javascript to scrape data from Google Play store using: 1-Request 2-Cheerios ...

javascript dependency-management node-modules 2018-03-20 7:45:09
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Download a file from NodeJS Server using Express
How can I download a file that is in my server to my machine accessing a page in a nodeJS server? I ...

javascript node-js file express download 2018-03-20 7:44:28
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Redirect parent window from an iframe action
What JavaScript do I need to use to redirect a parent window from an iframe? I want them to click a ...

javascript iframe dhtml 2018-03-20 7:43:30
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JavaScript replace \n with <br />
var messagetoSend = $.trim(document.getElementById(msgText).value); messagetoSend = messagetoSend.re ...

javascript regex replace 2018-03-20 7:45:54
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How can I add new array elements at the beginning of an array in JavaScript?
I have a need to add or prepend elements at the beginning of an array. For example, if my array loo ...

javascript arrays 2018-03-20 7:43:11
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how to make twitter bootstrap submenu to open on the left side?
I was trying to create twitter bootstrap submenu in dropdown menu, but I've got a problem: I have dr ...

javascript jquery css twitter-bootstrap 2018-03-20 7:45:32
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jQuery Ajax POST example with PHP
I am trying to send data from a form to a database. Here is the form I am using:

php javascript jquery ajax post 2018-03-20 7:42:52
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How to access the first property of an object in Javascript?
Is there an elegant way to access the first property of an object... where you don't know the name ...

javascript object 2018-03-20 7:44:09
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