Insert a page break if the height of a div does not fit in print media? - css

Question

I am dynamically creating elements on a web page which I want to print. I want a page break if the element can't fit in the rest of the A4 size paper.
Example is this question: Force an element to take exactly half of available height in print media
In the picture, A broken element is appearing on first page, which should actually go on the second page.
How can I force a page break if the element does not fit in this page.
**What I tried: **
I tried to use css page-breakafter` property, with the following code:
$(document).ready(function(){
$(".row").each(function(){
if($(this).height()>$(document).height()/2){
$(this).after('<div style="page-break-after:always"></div>');
}
});
});
But it does not work.
Here is a JsFiddle

Answer 1

I noticed in your fiddle that you have applied page breaks only after a few rows. The problem with your jQuery code is that, the $(document).height() will return a huge value compared to each row. In your case, document height = 3861 while each row is only 537. Hence 537 is never greater than 3861/2. Revisit the exact condition you need to apply the page break. I tried window.height instead and it works.
Note: You can only see the difference in print preview
EDIT:
Could you remove all the page break div's you manually added and try the below script.
What I tried is to capture the previous element height and then calculate if he page break is necessary.
For this purpose, I have kept a maxHeight of the document to be 1024 considering how much an A4 sheet can take up. Feel free to adjust the maxHeight according to your paper size.
$(document).ready(function(){
var prevRowHeight = 0;
$(".row").each(function(){
// console.log($(this).height());
var maxHeight = 1024;
var eachRowHeight = $(this).height();
if((prevRowHeight + eachRowHeight) > maxHeight){
$(this).before('<div style="page-break-after:always"></div>');
console.log("add page break before");
}
prevRowHeight = $(this).height();
});
});

Answer 2

Previous answer was good but there is a bug. You must need total_height. Please Check this I think this code help you. I use this code for a hospital management project for printing system. Thank you.
jQuery(document).ready(function(){
var prevRowHeight = 0;
var total_height = 0;
jQuery(".row").each(function(){
// console.log($(this).height());
var maxHeight = 1000;
var eachRowHeight = jQuery(this).height();
total_height += prevRowHeight + eachRowHeight;
alert('now : '+total_height +' , Was: '+ prevRowHeight);
if(total_height > maxHeight){
jQuery(this).before('<div style="page-break-after:always"></div>');
console.log("add page break before");
now_height = 0;
}
prevRowHeight = jQuery(this).height();
});
});