Pretty straightforward problem. Have scroll-able ion-content in my Ionic4 application. I want to be able to print it gracefully by applying #media only print styles. I'm almost there, but I have one major problem. I cannot get the vertical scrollbar to disappear for printing. Additionally, I only ever get one page printed, containing only the content that is in view when I print the page. I've scoured the web for solutions, and come across and tried various suggestions in the context of Ionic3 and earlier, but I haven't found the magic bullet for Ionic4 yet. Has anyone encountered and gotten to the bottom of this yet?
I have been through the ringer on trying to print content in Ionic 4. Some of the steps i followed to print multiple pages.
remove any flex-box styled lists. They just will not print how you want them to across pages, though they have worked fine for me if the content fits in a page.
for items you want to be seperated by page, its best if they are a display: block; styled item, so that that in the print style sheet you can use one of the page-break properties on it
on the item containing your list, the ion-content for example, make sure you remove any max-height attributes from it or any of its ancestor or child elements, as well as removing the overflow: scroll from these elements as well so that it allows your content to go from page to page. for example on my stylesheet for printing (cant share it because of NDAs) I had a lot of overflow-y: visible on elements just to make sure it shows. if you find an element thats cutting off your html, it should be the primary target for experimentation.
you can simulate a print in the dev tools, i found it useful, it's good for iteration here's a link
some other things that may help, but i am not sure as I did so much testing across browsers, and only vaguely remember what impact that css property had is to have the body with a static position, as well as having contain: none on the body to say that the browser should render as normal, little more explanation here
i do not know the specifics of your use case, but if you don't mind foregoing the native print button, and just giving the user a button to click to trigger the print, then that would be more manageable as you do not have to account for all the scaffolding around that specific element that you want to print (the ion-router, ion-page, and all the ancestors)
If you did that then you could put all your items you want to print into a div with an id of printSection or what you prefer, and then the javascript that is responsible for that page you can create your own print function. In my example i will use angular, if you are not using that then preform whatever DOM selecting you need to to get the native html out of your template.
#Component({ ... })
export class Page {
// select the item holding your print content by `#property` you gave it
#ViewChild('printSection', { read: ElementRef }) printSection: ElementRef;
...
customPrint() {
const printContent = this.printSection.nativeElement;
const WindowPrt = window.open('', '', 'left=0,top=0,width=900,height=900,toolbar=0,scrollbars=0,status=0');
WindowPrt.document.write(printContent.innerHTML); // pass in the native html you got
/**
* you should probably use an observable instead of an interval for this,
* but this is just to illustrate a bug where the print would be fired before
* all the content was written
*/
const interval = setInterval(
() => {
if (document.readyState === 'complete') {
WindowPrt.document.close();
WindowPrt.focus();
WindowPrt.print();
clearInterval(interval);
}
},
200);
}
}
I Solved it following this process
First, remove the content to be printed from ion-content. Use a div instead of ion-content(shadow-dom is implemented with ion-content which blocks your CSS classes)
You also need to force the CSS below on ion-page when printing (it is initially set to position: absolute, by default)
In my case I was printing from a modal component which has a default class "show-modal". I was able to print on multiple pages by target that class this way
#media print {
.ion-page {
left: 0;
right: 0;
top: 0;
bottom: 0;
display: block;
position: relative;
flex-direction: column;
justify-content: space-between;
contain: none;
overflow: visible;
z-index: 0;
}
.scroll-content,
ion-modal.show-modal,
ion-modal.show-modal .modal-wrapper,
ion-modal.show-modal .ion-page.show-modal,
ion-modal.show-modal .ion-page.show-modal > ion-content,
.ion-page.show-modal,
.ion-page.show-modal > ion-content,
ion-tab,
ion-tabs,
.app-root,
body {
contain: none;
position: relative !important;
height: auto;
overflow: visible;
}
}
I'm also trying to solve this same issue. I've scoured the Internet, and tried many an idea, but none has worked so far.
Perhaps we could solve this collaboratively. I'd put this as a comment, but I don't have enough rating points, so the system will not let me.
This is what I've found so far. In Chrome Developer Tools, you can click on a settings icon, then scroll to "Rendering," and on "Emulate CSS media type," select "print."
When I do that, it shows what the print view is. I created a separate css file, let's call it print.css, and in it, there is
#media print {
/* add your css styles for print here */
}
I know my print.css is being processed because I've
display: none
for ion-header and some tabs at the bottom, and they do disappear when I select "print" emulation in Chrome.
What is interesting is, I'm seeing the whole page -- scrollable and all -- on the screen in this print mode. However, every time I try to print it, only one page shows up.
That page, however, doesn't always start at the top. It includes the current viewport.
Which is why, I'm wondering if there is something in the css that is trying to keep the whole thing as a page. i.e., preventing a page break?
I'm experimenting with things like this:
ion-content, .foo, .bar, ion-list, ion-tabs, ion-item {
break-inside : auto !important;
break-after : auto !important;
break-before : auto !important;
}
(where foo and bar are classes you might have of your own.)
This above one breaks things. Removing ion-tabs, ion-list, and ion-item shows the full page.
I'm also experimenting with the following. None has worked so far, but that is probably because I haven't selected the right tag or class.
display: block !important;
height: 100%;
overflow-y: visible !important;
max-height: unset !important;
contain: none;
You may want to experiment with the tag in question that might be preventing a page break. Some people are suggesting it's flexbox or grid that's the root cause. I'd love to know how to find the root cause.
Good luck! If something works, let us know, so I'll also try it in my code.
I'm trying to dynamically set the max-height of Bootstraps modal-body elements for all modal dialog boxes. I've written the following, which seems to work when the dialog is opened. I'm depending on the enforceFocus method to exist and to be called once the dialog is rendered. I realize there may be moment before the CSS property is set where the dialog will not be rendered exactly right, but I'm okay with that. Is there anything wrong with this solution? I know I have yet to account for resizing the screen with a modal open, but that seems the easier problem to solve.
(function ($) {
$.fn.modal.Constructor.DEFAULTS.backdrop = 'static';
$.fn.modal.Constructor.DEFAULTS.keyword = false;
var oldEnforceFocus = $.fn.modal.Constructor.prototype.enforceFocus;
$.fn.modal.Constructor.prototype.enforceFocus = function () {
oldEnforceFocus.call(this);
var $element = this.$element;
var maxHeight =
$("body").height() // full page
- $element.find(".modal-header").outerHeight(true) // modal header
- $element.find(".modal-footer").outerHeight(true) // modal footer
- ($element.find(".modal-dialog").outerHeight(true) - $element.find(".modal-dialog").height()) // dialog margins
- 5; // fudge factor
$element.find(".modal-body").css("max-height", maxHeight);
}
})(jQuery);
Thanks!
edit: To give credit where credit is due, this is based on
Correct way to extend Bootstrap Modal - lock, unlock.
If you don't want to use javascript, you can use CSS media queries and get close-ish to the height you need by using min-height. For example, define a media query on min-height: 540px, and set the max-height of the modal to something like max-height: 500px. Then define a media query at say min-height: 680px and set the modal to max-height: 640px. It's not fluid, and it requires several media queries to inch up to the largest size you want to plan for, but it will get you there.
#Josh solution is good with CSS and media queries but writing so many media queries where small devices has different screen heights e.g Iphone and SamSung G and N series, required alot of media queries to even calculate close-ish modal height on different screen sizes.
so setting height of modal (modal-body) dynamically according to media screen size and on small devices where there will be 2 types of media screen landscape and portrait, following few lines of code will put you very close-ish to your goal
Rendering modal HTML according to screen size with-in sec and later if screen size changes adjust it's height according to screen size
$(document).ready(function () {
setInterval(Dimension, 100);
function Dimension() {
var doc = $(document).height(); // document height
var head = $(".modal-header").height(); // modal header height
var footer = $(".modal-footer").height(); // modal footer height
var modheight = doc - head - footer - 65; // 65 is extra margins and it will not effect the height of modal any way if not changed.
$('.modal-body').css('height', modheight);
}
});
Note
Few Changes required in Modal CSS
CSS
.modal-dialog {
margin: 0px auto !important;
}
.modal-body {
overflow-y: scroll; // In-case the content in modal-body overflow so it will have scrolling.
}
Fiddle
You can check the modal height adjust itself by increasing and decreasing the fiddle result window's height and width.
I have created table with data using "custom html app".
I want now print this page but when I try to do it, it cuts few last columns.
I have tried to set style of body to "width:1000px" and then it prints ok but then it doesn't shows on whole screen and I have table of size 1000px
We usually end up having slightly different css for printing than runtime.
Try this:
#media print {
body {
width: 1000px;
}
}
I'm using the supersized jquery plugin in order to display a fullscreen background slideshow.
Look at this website (it's not my own but I'm using the same structure):
http://mysampleconcept.com/situs4/
As you can see (for example if you give the header some opacity) the images begin at the top of the body.
But I want them to begin below the header (so that the header doesn't cover the top of the image).
If you give the supersized LIs for example top: 100px; the whole image moves down so that the bottom of the image disappears below my footer.
So that's not the solution I want.
So all in all which I need is the image to stretch to the biggest size it can, while still being inside the window not stretching over the top 100px nor bottom.
How can I do this?
Sorry, my English is not the best...
I found this solution but I don't know how to implement it: https://stackoverflow.com/a/12889088/1981981
You can use the solution offered in the question you refered to as a starting point. Just place it right below the $.supersized() inside your document ready function.
Since you want a top offset, we have to modify the top value aswell. I modified the snipped to suit your needs:
var portfolioSize = function() {
var headerOffset = 100;
$('#supersized').css({
height: $(window).height() - headerOffset,
top: headerOffset + 'px'
});
};
portfolioSize();
$(window).resize(function() { portfolioSize(); });
I changed the $(window).load Event to a direct call, since we place the code inside the document ready function.
Don't forget to modify the CSS for positioning as mentioned in the other answer (https://stackoverflow.com/a/12889088/860205).
Had a few problems getting background-image displaying in Firefox, I made it work but was surprised at how bloated the CSS became. It now works great, but I need to replicate base CSS code for multiple images.
Can anyone tell me if it is possible to optimise the CSS classes and minimise the amount of code. I cannot utilize the already used id's, and class='imga p0' doesn't work (where p0 just holds the background-position, becoming p1, p2, p3 .. for each image position).
Thanks in advance for any advice.
a.imga0 {background:url(../images/sprite.png) no-repeat;background-color:transparent;
display:block;width:24px;height:24px;background-position:-288px 0;} /* tick green */
a.imga1 {background:url(../images/sprite.png) no-repeat;background-color:transparent;
display:block;width:24px;height:24px;background-position:-312px 0;} /* cross grey */
a.imga2 { ..... and so on.
Edit:
So this should eliminate the repetition
/* template */
a.imag0, a.imag1, a.imag2 {
display: block;
width: 24px;
height: 24px;
background:url(../images/sprite.png) no-repeat;background-color:transparent;
}
/* specifications */
a.imag0 {
background-position:-288px 0;
}
a.imag1 {
background-position:-312px 0;
}
For one you could create a general selector
a {
background:url(../images/sprite.png) no-repeat;background-color:transparent;
display: block;
}
Which would apply the general style, such as the sprite image.
You could also create a separate class (specify more classes with spaces)
So for example, you could have
<a class="imag0 spriteclass">something</a>
<a class="imag1 spriteclass">something</a>
<a class="imag2 spriteclass">something</a>
And
a.spriteclass {
//again the template, such as the sprite and display type and width
}
Your second option is to list out the selectors you want the css to apply to,
a.imag0, a.imag1, a.imag2... {
// your general css
}
And then like above specify the specific sprite positions and details separately
Adding this just in case some one refers to this post later.
You can generate the most optimized CSS using this below tool.
http://www.spritecss.com/