javascript - How would I create a border with an absolute top and bottom, and fixed sides in CSS only? Image included -

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enter image description here

the content in pink behind it. managed create needed extend height via javascript. window resize, onscroll, etc way sides go way down connect bottom. i'd not use js @ all. ideas?

added have far: jsfiddle

css:

body {     background: #ff3300; } .border-top {     display: block;     z-index: 10;     position: absolute;     top:0;     right:0;     left:0;     margin: 20px 20px 0 20px;     border-top: 5px solid #d3ad42;     background: none;     pointer-events: none; } .border-right {     margin: 20px 20px 20px 0;     display: block;     z-index: 10;     position: absolute;     top:0;     right:0;     bottom: 0;     border-right: 5px solid #d3ad42;     pointer-events: none; } .border-bottom {     display: block;     z-index: 10;     position: fixed;     height: 20px;     bottom:0;     right:0;     left:0;     margin: 0 20px 0 20px;     border-top: 5px solid #d3ad42;     background: inherit;     pointer-events: none; } .border-left {     margin: 20px 0 20px 20px;     display: block;     z-index: 10;     position: absolute;     top:0;     left:0;     bottom:0;     border-left: 5px solid #d3ad42;     pointer-events: none; } .content {     padding: 40px;     min-height: 1400px; }

js:

var width, height, scroll;  document.addeventlistener("scroll", resize, false);  function resize() {     height = $(window).height();     width = $(window).width();     scroll = $(document).scrolltop();      // border     $('.border-left').height(height + scroll - parseint($('.border-left').css('margin-top'), 10) * 2);     $('.border-right').height(height + scroll - parseint($('.border-right').css('margin-top'), 10) * 2); }

if understood correctly, want whole page overlay.

here's example of how make 1 css. a working example on jsfiddle.

html (minimal):

<html>   <body>     <div id="overlay">hello!</div>   </body> </html>

css:

body { position: relative }  #overlay {   position: absolute;   top: 30px;   bottom: 30px;   left: 30px;   right: 30px; }

a bit of explanation wouldn't hurt, guess. #overlay element want make cover whole page. style pretty straight forward. make absolutely positioned , anchor sides sides of page.

now, not enough. you've noticed won't cover whole page. part before fold. why that? that's because default #overlay have html element containing block. spans size of viewport. there ways make span way down bottom of page it's easier make body containing block overlay. , changing position relative that.

update: there no example. you'd need 4 elements replicate technique described still applicable. 1 element can replicate visually bit cover content , users unable select or click links or interact in other way.


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