Can javascript read webpage? [closed] - javascript

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can my page Javascript read same page which itself is loaded? Like other parts of page are dynamically loaded by other provider. I have tried many things, google as well, but now I am in doubt that it is posible. Or it is.
Thank You!

If the page has loaded and the javascript you are running is client-side (which it should be), you should be able to access everything on the page via the document object. I would advise reading about the DOM to familiarise yourself with this.
EDIT: removed link

Server side code (whether written in JavaScript or otherwise) is not capable of determining the final rendering of the page in the user's browser.
You could build the entire page yourself (and you could use a headless browser, like PhantomJS, to do it) but that could give different results to a visitor's as you would have a different set of cookies, a different source IP address, and so on.

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the code of some page is cut when using curl or display the source code of the page [closed]

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I explain my problem to you:
When I do PHP curls on some site or want to display the source code of the page element is missing a lot. I think some part is called by a script or something. Could someone help me view the entire code with Curl PHP.
To duplicate my problem go to Facebook or LinkedIn and right click on the page and "View the source code of the page", in this you don't see all the page content but when for example you right click and "inspect an element" You can.
Thank you in advance
CURL can't do this. It's not designed to render HTML or execute JavaScript.
A lot of the content on Facebook, LinkedIn, Twitter and many other pages is loaded through different ways. (like fetch()-requests or WebSocket-Events)
Some nodes you can see in the inspector are not part of the original document (which you are viewing with "view source" or curl downloads). What you see on the inspector is everything currently held in memory, which was partially (or completely) created with a scripting language.
This is basically done to
reduce the load on servers as it doesn't have to generate the whole page on every request
reduce traffic on clients and servers (no need to reload the header-data and/or scripts over and over again)
If you need data from a rendered site, you should either check if the website provides an API which gives you the data you are looking for or use one of the cli-rendering-engines from this answer.

Store contents of a <div> to another webpage [closed]

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I want my users to be able to view content on my website, and when they see content they like (My website randomly generates content using JQuery.load() ), I would like them to be able to store it onto a personal page that they have to log in to, to see.
My page loads content with the line:
$(".resultContent").load(skillList[skillChoice]);
The variable "SkillList" is assigned "skills.html #id"
the '#id' part is identifying a <div>, and that's the part I want to be stored, and I want the user to be able to store multiple parts of the page skills.html on their personal page.
This sounds fairly complex, but I was wondering if it's doable, if so, what language(s) would I need to use?
You will need to save those html snippet on the server, mostly likely in a database. This can be done by client-side javascript, an ajax POST. The server side can use any language.
Since you are saving some html on the server and will load that in a page. The server side must sanitize the html snippets for security.
When the html snippet is saved, the server needs to know who sends the request. That is the user needs to log in before or when s/he saves the content for later use.

Program to repeatedly get the contents of a webpage [closed]

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I wish to get the contents of a web page that requires me to be logged in (and one that I do not have control over: e.g. Twitter or Facebook), for example I can have Chrome running and I can see Ajax updating the page updating, but I want to periodically get the contents of this page and somehow save it. I don't mind leaving a computer running to achieve this...
You can use any http software to achieve this (like curl). Depending on the site it will take some investigation of how requests are made, in what order, the post data, the encryption, the user agent, cookies, headers, etc. etc.
It could take some time to find the right recipe.
Generally these sites don't want you to do this though, so don't be surprised when you run up against captcha or other clever methods from preventing exactly what you're trying to do.
Chances are, if you have to ask, you won't get in. But have fun.

AJAX Microgames [closed]

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If you're not familiar with the concept of a Microgame, check out this video of WarioWare Twisted.
I'm interested in setting up a site where users can play series of browser-based Microgames which are delivered to them by a server. Ideally this would allow me to crowdsource the games and have an open submission system. What sort of scheme could I use to make this work?
I'm thinking that one way to do it would be to have each game consist of:
A javascript file that defines a MicroGame object that controls a rectangular portion of the screen, gets input and timing information from the main page, then calls back to the main page with a "Success" or "Failure" message.
A folder of assets that must be downloaded before the game executes.
Is this possible to do, client-side within a browser? Where would be a good place to start figuring this out?
There are a lot of open issues here. The biggest problem is what language do they submit games in which you can execute safely on the players machines? That said, there are tools like this out there. You could look at the excellent Play My Code for inspiration.

Javascript - Dynamically Create it? [closed]

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I have a set of users with different permissions. Depending on what permissions they have, they should only have access to a certain javascript files. In terms of speed, is it better if on every instance of their visit, I check the permission of that user, create one javascript file that contains ALL the javascript commands accessible to that user, and load that file into the view?
Or is it better to have multiple javascript files, call them page#_permission# (for instance, page1_permission10.js), and just load the corresponding files every time the page loads?
Thanks
It is probably faster to load in only the JavaScript that is needed BUT...
It probably will not be significant enough to warrant the effort. Futhermore, you may find youself in debugging hell just to save a few ms.
Firefox and many other browsers have built in tools which describe how much time it takes to load a page. Below a recent example for stackoverflow.com. You can perform a similar operation you site and locate the bottlenecks.

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