Enforce Print Page Breaks with CSS

问题:

I have a page that basically displays all work orders for a given day. I have tried to create the HTML so that I can use page-break-after: always to create a logical print page break and continue on. However when the user prints the page, there are often overlaps, multiple work orders on the same page, etc. I simply want to enforce a hard page break that Firefox, Safari, and Chrome will listen to.

My HTML looks like this

<div class="WOPrint">
    <div class="WOHeader">
        <h1>Header stuff</h1>
    </div>
    <!-- content -->
</div>
<div class="WOPageBreak"></div>
<div class="WOPrint">
    <div class="WOHeader">
        <h1>Header stuff</h1>
    </div>
    <!-- content -->
</div>
<div class="WOPageBreak"></div>
<!-- repeat N times -->
<div class="WOPrint">
    <div class="WOHeader">
        <h1>Header stuff</h1>
    </div>
    <!-- content -->
</div>
<div class="WOPageBreak"></div>

and my CSS is basically like so:

.WOPrint
{
    max-width: 100%;
    padding-bottom: 3em;
}

.WOHeader
{
    display: block;
    page-break-inside: avoid;
}

.WOPageBreak
{
    height: 1px;
    width: 100%;
    float: left;
    page-break-after: always;
    display: block;
}

EDIT In a hackish attempt I have played around with setting the WOPrint class min-height. Changing it to 9 inches seems to give me enough margin room for printing from all Safari, Firefox, and Chrome when I have it set to a standard US paper size. This is certainly not the way I would like to fix it, but I also don't want to have to render to PDF.

.WOPrint
    {
        max-width: 100%;
        padding-bottom: 3em;
        min-heihgt: 9in
    }

回答1:

short answer. You can't it's not consistetly supported across all browsers. there is slightly better support for page-break-before than page-break-after though...

see page-break-before compatibility and page-break-after compatibility

you could also try embedding a Ctrl-L in the page at those points thought I'm pretty sure a lot of printer drivers are gonna ignore that.

回答2:

By setting the min-height in the WOPrint CSS class I'm able to fake an approximate page break for a standard height page:

.WOPrint
    {
        max-width: 100%;
        padding-bottom: 3em;
        min-height: 9in;
    }

回答3:

All you need is

.WOPageBreak
{
    page-break-before: always;
}

However, you'll also want to add "overflow:visible" to the body tag because without it Firefox will only print the first page.

You may also get more consistent results if you set margin:0 on the body when printing, like so:

@media print{body{margin:0}}