Javascript to simulate typing in contenteditable - javascript

I have a contenteditable div that I'd like to see the contents after a user types. This differs across different browsers for certain keys (like newlines and backspace).
For testing, I'd like to simulate this typing with javascript. Is there any way to do this?
I need more than just triggering events (which the majority of the questions on SO on javascript key triggering are about); I need the browser to see the 'enter' key was hit and do its thing to modify the contenteditable div. I'm interested in what the browser ultimately does so just listening for certain keystrokes and modifying the HTML myself would thus defeat the purpose.

This answer won't give you a way to do it via JavaScript, but I would recommend the browser automation testing tool, Selenium for this kind of testing. It will allow you to test the div as a user would interact with it.

Related

Weird button behavior while scrapping bet365

I am trying to scrap odd data by Pyppeteer from bet365 follow their UI flow and need for help.
The pages are just like this.
https://www.bet365.com/#/AC/B1/C1/D8/E123540970/F3/
If the match is outdated, just get into one of the matches that not in-played from following.
https://www.bet365.com/#/AS/B1/
For the collapsed button named "Handicap Result" at the bottom of the page, I can normally use my mouse cursor to click on it and make it expand and retrieve its data.
But when I tried to use Pyppeteer's click or javascript to do it, that is querySelector() and click(), it just weirdly failed.
Observing html and xhr after click(), it definitely triggered something and tried to do something, but the content just failed to shown.
I tried to click on different coordinates, key Enter and Space, click with delay, and all failed.
Could someone tell me how could I expand it use javascript?
Was I dissipating wrong events?
Thanks.
This is probably one way they use to avoid scraping.
U tested with pure JS direct from DevTools?
Bet365 its really, really hard to scrape. They use Cloudflare blocking and protection system (including AI to detect autonomous agent like Puppeteer, even if you use stealth mode).

How to add Keyboard Shortcut functionality to a HTML button

Well I was wondering how can I add Keyboard Shortcuts functionality to a HTML button. For example if you wish to bookmark a webpage you have keyboard shortcuts as CTRL+ D for chrome and safari but I wish to put the same functionality in a button so that when user clicks on it ,it bookmarks the page instead of showing an alert message to use CTRL + D like in this code.
so can this be done? I have no idea if it's possible, Even popular Addthis buttons display the same alert thing to use ctrl+d like on this site.
In HTML, the accesskey attribute allows to define a single letter, and leave handling the modifier keys to the browser and the operating system, to avoid conflicts.
<button aria-label="+ add this" accesskey="a"><span aria-hidden="true">+</span></button>
This is great in theory, but in practice there are some accessibility concerns. The ARIA standard also has a lengthy section on considerations for keyboard shortcuts.
I still would go with this, as it’s the best option we currently have. You wouldn’t want to handle platform conventions in your code.
You can even retrieve the key combination the browser finally assigned by using the accessKeyLabel attribute, but browser support is not great.
button.title += ` [${button.accessKeyLabel || button.accessKey}]`;
If you are using single character shortcuts, you need to provide a mechanism to change these shortcuts, should they interfere with other AT shortcuts:
Understanding Success Criterion 2.1.4: Character Key Shortcuts

Get clipboard contents with Greasemonkey

Is there the possbility to get the textual content of the clipboard to paste it automatically into a textarea clicking a button? Just found a method to copy data to it, but not to read data from it.
No, you cannot do this in javascript because it has proven to be a huge security hole.
Likewise, the developers of Greasemonkey are unlikely to add this capability for the same reasons.
You can write a Firefox add-on that does this, but I've never seen a (legit) use case.
A technique that works well for me is to have the Greasemonkey script set focus to the textarea (or input) and then I merely press CtrlV. It's super convenient and actually faster than grabbing the mouse to click a button.
You can try to implement this using the clipboard interface.
Please check this out:
https://developer.mozilla.org/en-US/docs/Web/API/Clipboard/readText#example
https://developer.mozilla.org/en-US/docs/Web/API/Clipboard/write#example

LightSwitch Controls Keypress events

I want a way to capture the keypress events on my controls and if it's an Enter, set focus to the next control.
We had to do this once in a simple ASP.NET application to allow users to navigate through the controls by pressing enter on a Web Environment. We used a simple JavaScript back then.
Is there a way to accomplish this? If it envolves creating custom controls, are the LightSwitch control's classes available so I can inherit them all or something like that?
If you need to do it for a large number of controls, you'd be better of creating a custom control (preferably a control extension - binding is automatic), but you're going to need to create several different controls I'd imagine, not just a TextBox.
Of course it's up to you, but you might find it easier to just explain to/teach your end-users that "Tab" goes to the next control, "Enter" does not. This is the way that most Windows applications work, so you'd be going with the flow, instead of against it. There's a reason it's called "tab order".
Sorry, I know it's probably not what you wanted to hear, and you're not the first to ask for a way to do this, but as I said, you'd be going against the way that most, if not all, modern Windows software works, and it's not simple thing to do.

Best way to capture all key events for a web application?

I'm a little distraught at the current state of key capturing for web applications. It works great as long as you know your user is going to be typing in a specific place (e.g. an input field), but as soon as you want to do global shortcuts for an entire "application", it seems to fall apart.
I'm trying to find out if there is a better way to capture all the key events for a web page than the method I am currently using.
My current method is to use the JQuery Hotkeys plugin, bound to the document element, i.e.:
$(document).bind("keyup", "delete", function() {});
That works great for most purposes, but for example on Firefox, if the user happens to absentmindedly move their mouse over the navigation bar, the delete key will sometimes result in the user going "back", and the key is never received by the handler so that I can stop propagation.
Is there a different element I should be binding to? Is there a better plugin out there for this? Should I just avoid using any keys that are bound to things in common web browsers?
As more and more web applications look to mimic their desktop counterparts, it seems like this is a basic feature that web developers will increasingly require.
EDIT: I should point out that I am already using e.stopPropagation() and e.preventDefault(). The main problem seems to be that sometimes the event is never even passed to the bound function. I am basically wondering if anyone has figured out a "higher" element to bind to other than document. Or is there an alternative I have never even thought of? Embedding an invisible Flash element on the page and then passing all keys from that to JavaScript, for example (I don't think this would work).
I think, at this point, I am doing things the "standard, well-known way." I am trying to see if there is an outside-the-box way that isn't widely known that maybe someone on Stack Overflow knows about :-).
If you are making a sophisticated web-app with customized keyboard controls, the first thing you should do is alert the user that you are making a sophisticated web-app with customized keyboard controls. After that, tell them what the controls are and what they do.
Binding the keypress and keydown listeners to the document is the correct way to do it, but you have to remember to preventDefault and/or stopPropogation for keypresses that you want to override. Even if there is no default behavior, you will need to prevent them from cascading in case the user has rebound their default keyboard shortcuts.
Also, you will only be able to receive keyboard input when the page has focus.
When you say Delete I assume you mean the Backspace key as Delete generally referrs to the key next to Insert, Home, End, Page Up and Page Down.
Edit to add:
Be very careful about which keys you choose to override. If you're making an app to be used by people other than yourself, you have to worry about usability and accessibility. Overriding the Tab, Space and Enter keys is risky, especially for people using screen-readers. Make sure to test the site blind and fix any issues that may arise with traversing the page via the keyboard.
maybe you can use html-attribute ACCESSKEY and react onfocus.
i.e.:
<input type="text" size="40" value="somefield" accesskey="F">
i think u might need to add a tabindex to tags like <div>
<div id="foo" tabindex="1" accesskey="F">
You can't bind to events that happen where you have no control - e.g. the window chrome. The way most webapps deal with this is asking the user to confirm their decision to leave the page, using the onbeforeunload event:
window.onbeforeunload = function (e) {
var str = 'Are you sure you want to leave this page?';
e = e || window.event;
if (userHasSomeUnsavedWork) {
e.returnValue = str;
return str;
}
}
onbeforeunload - MDC
Absolutly non-tested but... try it on 'window' element.

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