Transition not being captured by subtree & attribute breakpoints Chrome developer tools - html

I have a webpage on which if a tab key is pressed when in the last textbox a side pane from the right slides(like a side menu).
In chrome development tools I can see it is an aside tag with classes control-sidebar control-sidebar-dark but setting DOM break points(subtree & attribute) on the aside tag is not capturing anything.
On looking into DOM it seems like it is not being manipulated at all(which I expected sliding in should be doing) as I do not see the color blink on HTML tags that chrome developer tool shows for the affected elements.
I was expecting the javascript to be handling the sliding in of the aside tag but how could it be determined in this scenario? Could this be due to CSS only animation or something if yes than how to debug that?
I also tried to record in the animation tab of developer tools but it also stays blank.
This is happening on a privileged section of the site so I m sorry for not being able to put code sample or URL.
PS: The template is some modified version of http://www.ampleadmin.wrappixel.com/ampleadmin-html/ampleadmin-rtl/index.html(the navigation panel on right) but it is getting recorded in dev tool animation panel while mine doesnt.

I found out the cause. There are anchor tags inside the panel which get focused on when the tab is pressed from last textbox. There was no animation,CSS or JS involved.
Anchor(A) tags are focus able by default and the panel dont slide in when they are removed.

Related

How to inspect the CSS file in Angular 5 or line to change CSS if we want any CSS?

I am making project in Angular 5. When I inspect the CSS there is tag. If we want to change or find out that CSS is coming from which file basically or which line number of that file (like we do in normal html page). How can I find it?
With angular, the CSS is injected straight into the html page during compilation.
Therefor it's not possible to see where the CSS came from with the DevTools.
However, it is possible to see the CSS styles applied to an element, if you want to find out which file it came from, you will have to search the project.(ctrl+shift+f)
If you're using Google Chrome, you can use the developer console. Safari has a similar interface, but I'm not as familiar with that.
To access the developer console on Chrome, use keys Cmd-Option-I and you should see a console pop up on the right of your browser window. Next, if it isn't already selected, select the Elements tab at the top. You should now see the html that your browser rendered into the site.
Next, you'll want to select the element you want to inspect. You can either do this by accessing the nested HTML structure directly, or if you select the mouse icon at the top left of the window, you can select an element on the webpage and it will be expanded in the developer console.
Once you've selected an element (it should be grey/blue highlighted), you can see its styling at the bottom of your tab. The styling is in decreasing hierarchy order: the top elements override the bottom ones. You can see the styling is grouped based off of the id/class that it is applied to and at the top of each section is the file line of from which the styling came. Click that link to see the file!

"Inspect" a hover element?

Note: I've read similar threads, but none quite my issue - I can right click on it fine, it just then disappears.
I find 'Inspect Element' an invaluable tool in Chrome, however I'm having trouble using it for sub-menu for an element on my nav bar, which pops up below on hover of its parent item.
The popup (or down) isn't quite styled how I'd like, so I right-click > inspect element to see what's coming from where exactly, and get a better idea of how to achieve my desired effect.
However, as soon as I move my mouse away from the menu, it's gone; thus I can't select different elements in the inspection pane, and see which area is highlighted at the same time.
Is there a way around this, without changing the menu, so that it stays 'popped up' once activated?
If the hover element is triggered by JS (if triggered by CSS :hover, see gmo's answer), you can inspect it if you pause script execution. This is a much simpler way of freezing the DOM than the other answers suggest. You can pause script execution without losing the hover element as follows:
1. Via a keyboard shortcut
Here's how you do it in Chrome. I'm sure Firefox has an equivalent procedure:
Open up Developer Tools and go to Sources.
Note the shortcut to pause script execution—F8 (there may also be another depending on your OS).
Interact with the UI to get the element to appear.
Hit F8.
Now you can move your mouse around, inspect the DOM, whatever. The element will stay there.
2. Via a delayed debugger statement
Some web pages attach keydown / keypress / keyup event listeners which interfere with the shortcut above. In those cases, you can pause script execution by triggering a debugger statement while the hover is open:
Open the JS console, and enter:
// Pause script execution in 5 seconds
setTimeout(() => { debugger; }, 5000)
Trigger the hover and wait for the debugger statement to execute.
If the hover effect is given with CSS then yes, I normally use two options to get this:
One, to see the hover effect when the mouse leave the hover area:
Open the inspector in docked window and increase the width until reach your HTML element, then right click and the popup menu must be over the inspector zone... then when you move the mouse over the inspector view, the hover effect keep activated in the document.
Two, to keep the hover effect even if the mouse is not over the HTML element, open the inspector, go to Styles TAB and click in the upper right icon that says Toggle Element State...(dotted rectangle with an arrow) There you can manually activate the Hover Event (among others) with the checkbox provided.
If it's not clear at all, let me know and I can add a few screenshots.
Edited: screenshot added.
And finally and as I say at the begining, I only be able to do this if the hover is set with CSS:HOVER... when you control the hover state with jQuery.onMouseOver for example, only works (sometimes), the method One.
Hope it helps.
What worked for me is selecting the specific a tag I wanted to inspect and configure it to break on attribute modification:
After doing the above, I would again normally select that a tag then the dropdown will automatically stay as-is even when I mouseover to other places like Inspect Element, etc.
You can just refresh the browser when doing inspecting the menu dropdown elements to go back to normal state.
Hope this helps. :)
You can also do this in the javascript console:
$('#foo').trigger('mouseover');
An that will "freeze" the element in the "hover" state.
Here's how I do it with no CSS changes or JS pausing in Chrome (I am on a Mac and do not have a PC in front of me if you are running on Win):
have your developer console open.
do not enable the hover inspection tool yet, but instead open up your desired sub menu by moving your mouse over it.
hit Command+Shift+C (Mac) or Ctrl+Shift+C (Win/Linux)
now the hover inspection tool will apply to the elements you have opened in your sub-nav.
Open Inspect element
Now go to elements now on right side and select hover
It will show all hover effects
Not sure if it was present in previous browser revisions, but I just found out this extremely simple method.
Open the inspector in chrome or Firefox, right click on the element you are interested in, and select the appropriate option (in this case: hover).
This will trigger the associated CSS.
Screenshots from Firefox 55 and chromium 61.
I needed to do this, but the element I was trying to inspect was added and removed dynamically based on hover state of another element. My solution is similar to this one, but that didn't quite work for me.
So here's what I did:
Add simple script to enter debugger mode upon mouseover of the element that triggers the hover event you're concerned about.
$(document).on('mouseover', '[your-hover-element-selector]', function(e) {
debugger;
});
Then, with the dev console open in Chrome, hover over your element, and you will enter debugger mode. Navigate over to the sources section of the dev tools, and click the "Resume script execution" button (the blue play-like button below).
Once you do that, your DOM will be paused in the hover state, and you can use the element inspector to inspect all the elements as they exist in that state.
I found a very simple way to do this if for some reason you have problems with script pausing:
Open Dev Tools on "inspect"-tab.Hover to make the pop-up appear.Right-click on the desired element in your pop-up and press 'Q' (in Firefox) to inspect that element.Use keyboard to navigate: Arrow Up/Down: Move between elementsArrow Left/Right: Collapse/ExpandTab/Shift+Tab: Move between inspector and CSS rules and inside CSS RulesEnter: Edit CSS Rule
Excellent stuff!
Thank you to gmo for that advice. I did not know about those attribute settings massively helpful.
As a small revision to the wording I would explain that process as follows:
Right Click on the element you would like to style
Open 'Inspect' tool
On right hand side, navigate to the small Styles tab
Found above CSS stylesheet contents
Select the .hov option - This will give you all the settings
available for the selected HTML element
Click and Change all options to be inactive
Now Select the state that you would like to tweak - On activation of any of these, your Stylesheet will jump you directly to those settings:
Styles - Tweaking Filters - Interactive elements
This information was a lifesaver for me, cannot believe I have just heard about it!
Change the CSS so that the property which hides the menu isn't applied while you work on it is what I do.

Inspect hovered element in Chrome?

I am trying to view, through Chrome's developer tools, how tooltips are structured on a site. However, even when I am hovered over the item, when I "inspect element", nothing shows for the tooltip in the html. I know I can set the Style to :hover, but I still can't see the html or css of the tooltip.
Any ideas?
F8 will pause debugging.
On Mac, you may need to have the 'Sources' tab of the developer tools open.
Mouse over the tooltip, and press F8 while it is displayed.
You can now use the inspector to look at the CSS.
I actually found a trick to do that with the Twitter Bootstrap tooltips. If you open the dev tools (F12) on another monitor, then hover over the element to bring up the tooltip, right click as if you were to select 'Inspect Element'. Leaving that context menu open, move the focus over to the dev tools. The html for the tooltip should show up next to the element its a tooltip for in the HTML. Then you can look at it as if it were another element. If you go back to Chrome the HTML disappears so just something to be aware of.
Kind of a weird way but it worked for me so I figured I would share it.
This solution works without any extra code.
Hit command-option-j to open the console. Click the window-looking button on the top right corner of the console to open the console in a different window.
Then, in the Chrome window, hover over the element that triggers the popover, hit command-` however many times you need to focus on the console, then type debugger. That'll freeze the page, then you can inspect the element in the Elements tab.
Click f12 go to the console tab and add the following:
setTimeout(()=> {debugger},5000)
This will give you 5 seconds to do whatever you want and it will break at 5 seconds. Then you can inspect the target element
(ex. hover the element and wait 5 seconds then inspect..)
You would just need to force the tooltip to show as such
$('.myelement').tooltip('open');
Now the tooltip will show regardless of hovering state.
Scroll down near the bottom of the DOM where you should see the markup.
Update see cneuro's comment for Bootstrap 3.
$('.myelement').tooltip('show');
Update see Marko Grešak's answer for Chrome and apparently Safari as well, $0 can be used as a shortcut for the currently selected element. This appears to work in Safari as well.
$($0).tooltip('show')
Single window answer, with no coding
None of the other answers are quite right, or have enough detail, so here's my attempt.
Open Chrome's DevTools using F12/Ctrl+Shift+I (Windows/Linux) or Command+Option+I (Mac).
Select the Sources tab in the DevTools window.
Using the mouse, hover over the element you want to inspect, to make the tooltip visible.
Press F8 (Windows/Linux/Mac) to pause script execution. The main window will grey out, and a "Paused in debugger" popup will appear.
In the DevTools window, select the Elements tab
For Bootstrap tooltips, the tooltip will appear as the last <div> in the <body>
For me, the accepted answer didn't work: clicking in DevTools immediately closed the ToolTip.
However, I found https://superuser.com/questions/249050/chrome-keyboard-shortcut-to-pause-script-execution which helped me:
In the console:, Run:
const F12 = 123
window.addEventListener('keydown', function(event) {
if (event.keyCode === F12 ) {
debugger;
}
});
Highlight element with inspector
Hit F12
You can now inspect the element, with JavaScript paused so the DOM won't change.
it is so simple to edit these tooltips.
Step 1: Inspect the element that has the tooltip. Make sure it is highlighted with blue in devtools.
Step 2: right-click on the element (in devtools part) and select: attribute modifications, under Break on
Step 3: Hover over the inspected element and a gray overlay will appear over the site with a small text: Paused in debugger
at the top of your screen
Step 4: Click on the blue arrow until the hover state is selected.
Step 5: Inspect and edit the tooltip
No code solution for JS activated tooltips:
With Chrome's devtools inspect the containing / parent element of the tooltip. In the "elements" tab, right click on that container DOM element then choose "break on" > "subtree modifications". The next time you hover over the part of the DOM the tooltip is housed in, the JS code will be paused allowing you to inspect the contents of the tooltip.
Follow these steps
Open Inspect window in chrome.
Place the mouse over the tooltip.
Press F8
JS execution will be paused and then you can inspect the tooltip.
Press F8 again to start execution and F10 to debug.
Here is how I did it on Mac:
Hover over the element that has a tooltip with chrome devtools opened.
Wait for the tooltip to appear.
Open devtools command palette with a keyboard shortcut. Cmd+Shift+P worked for me.
Type in Disable JavaScript and press Enter
This will prevent from fading all the tooltips that utilize JavaScript.
Hover over the element, press F8 for little longer, it will pause script execution.
Here’s a simple solution: If you have dynamic tooltips, you can make them “persistent” by (temporarily) changing the trigger event to click. This will have the effect that the tooltip only disappears on a click-out:
$('body').tooltip({
selector: "[data-toggle='tooltip']",
trigger: "click"
});
This way, it can be easily inspected with FF’s or Chrome’s debugging tools.
1)Open the Inspect window by clicking F12
2)Go to source tab(next to console)
3)Now hover on element to be inspected and keep your mouse over there.
4)Using keyboard(Tab or shift+tab) to move the control to pause button or F8Refer the image
5)When keyboard focus is on Play button. Hit enter. Your hover element will be freezed you can do anything now
just hit one line script in console and press any key to enter in debug mode.
window.onkeydown = () => { debugger }
The dev tools provides a way to inspect a hovered element like a tooltip.
1 - Open the dev tools using F12.
2 - Select "Elements" tab.
3 - Select the parent element that contains the tooltip.
4 - Click on "..." (on the line of the parent element) and after select "Break on"/"subtree modifications" (see image below)
5 - Finally go back to application and make the Tooltip shows up. It should block the execution after the Tooltip gets visible
Hope it can be useful for someone!
appear the hovered item by over mouse
windows --> Ctrl + shift + c || Mac --> Command + Option + C
I had problems with this so I went to the documentation and inspected the tooltip that is already rendered on the page. That helped me see the dom structure of the tooltip and edit it accordingly.
In Chome on Linux this can be achieved for JS generated tooltips such as those for references on WikiPedia by doing the following:
As stated above, open the dev tools using F12. Open them in another window.
Highlight the tooltip and click Ctrl-Shift-C (The HTML Inspector). As you move over the tip, the dev window will show the appropriate section.
If you need to keep the tip open when you mouse off it, to be able to inspect it in the other window more thoroughly, then right click on the tooltip and leave the context menu up, and click on the the dev tools window. In this scenario it leaves the tip up in the wikipedia window.
To a degree it also works with bootstrap tips.
For some reason the answers provided here weren't working for me on Windows. I was able to inspect the tooltip by opening the dev tools, then hovering over the element that brings up the tooltip, then right clicking on that element (not the tooltip). Then, move the cursor over into the inspector panel and scroll down to the bottom. The tooltip element should still be there.
Another Solution I found for this problem. Through Mobile or Tablet view in Chrome
press Crt + Shift + M in Chrome Dev tools for Mobile view in Chrome.
Click(Tap) on ToolTip div and you can inspect it with Right Click on tooltip
Hit command-option-j to open the console. Click the window-looking button on the top right corner of the console to open the console in a different window.
Then, in the Chrome window, hover over the element that triggers the popover, hit command- however many times you need to focus on the console, then type debugger. That'll freeze the page; then you can inspect the element in the Elements tab.
I found a good way I was struggling with this :
• Open Elements Tab
• Inspect an element on the page , should be close to the element that you are trying to inspect
• Hover over the tooltip
• While the dev/Elements tab is open Hit Ctrl F to move the focus to Text area in element tab where it Says Find by string , selector , or Xpath
• use the keyboard key to navigate up/down the elements till you will get to the elements that you are looking for , dont touch your mouse
Land in this post for answers and find eventually a way to do it. Inspect the parent element of tooltip and set break on subtree change and hover your mouse on element and click F8 till the tooltip appear. You can have your tooltip and check the styling.
some tooltips disappeared when we open the inspect part on hover mode, sometimes they don't disappear when change responsive tab (active or inactive button).
then you can right click and get inspect from it.so easily.
Worth noting that toggling the :hover state from within the dev tools only has an impact if the hint text is enabled via CSS :hover rules in the first place. The toggle only applies the hover state to the element for rendering purposes, but does not trigger a corresponding JavaScript mouseover event.
Many frameworks such as AngularJS dynamically attach tooltip HTML to the bottom of the document body via JavaScript when a target element is hovered, so any amount of hovering and inspecting the target element won't help.
#joeyyang's answer worked very well for me in this scenario.
One of the easiest ways I found is:
Open Chrome dev tools on the side
Hover over element
Right-click
Click on dev tools
Now you can inspect and change styles

Is there a tool to examine HTML page without clicking?

My problem is this - when I click the down button on any input control on my form in Chrome a popup window is displayed. I am positive my code does not do it. The fact that it happens only in Chrome makes me think of some misbehaving Chrome plugin/extension.
Anyway, I would like to see the HTML element responsible for this popup. However, I cannot find it in the dev tools and trying to focus on it does not work - the popup closes the moment I click the page.
So, my question - is there a easy way to get hold on this HTML element without clicking the page?
I am using Chrome 23.0.1271.64 with the following extensions (according to the Chrome itself):
Advanced REST client 3.0.30
JSONView 0.0.32
OneClickDownload 1.2 Web
Developer 0.4.1
This looks just like the standard input field suggestion box. I suspect it is not part of the web page. Therefore it won't appear in the DOM and you can't style it, because it is part of the browser not the web page (although it appears over the top of the web page).
You can suppress it by putting the attribute & value autocomplete=off on the form field, although that is from HTML5 and will not work in all browsers just yet. See Is there a W3C valid way to disable autocomplete in a HTML form?

Chrome "Developer Tools" element - hide annoying yellow dimensions box

How do I hide the annoying yellow box that appears under html fields when I hover over elements in the Chrome "Developer Tools" elements panel - it's driving me nuts as I can't see the bottom of my labels etc...
From the posted bug: "https://code.google.com/p/chromium/issues/detail?id=282493". If you hold keyboard Control (Ctrl) key before hovering the element (or command on a mac) the tooltip won't show. Not the ideal solution but it works as long as you know about it
You might want to check Chrome 16 which got an improved element tooltip. Please comment on the bug and mention specific issues that you want to get fixed.
You can pretty easily tweak devtools yourself. Basically, follow these instructions to get started.
Then, inside inspector.js, tweak WebInspector.highlightDOMNode, by applying this small patch.
1150,1151c1150
< // Do not highlight the DOM node.
< //this.highlightDOMNodeForTwoSeconds(nodeId);
---
> this.highlightDOMNodeForTwoSeconds(nodeId);
Fore more info, check out this post on extending Chrome DevTools.