javascript - CSS won't apply to HTML code in to-be-placed-variable with innerHTML -

i've got html code placed button .innerhtml css behaves weird. when try apply css id #herpderp won't nor affect selector descendants @ all.

when @ site chrome developer tools elements nested. if #herpderp can't changed way why global selectors img , p change? , better way apply css since dont want use inline styling nor global selectors img, p , section?

any critism welcome.

html

<div id="navigation">  <a onclick="changecontent(0)" href="#herpderp">test area</a> </div>  <div id='background'>   <div id=maincontent>     <div id="content">     </div>   </div> </div> 

javascript

function changecontent(link) { switch (link) {     case 0:         document.getelementbyid("content").innerhtml = herpderp;         break;     } }  var herpderp = '<section id=\"herpderp\">' +                    "<h1>blahblah</h1> " +                    "<p>lorem ipsum dolor sit amet, consectetur adipisicing elit, sed eiusmod tempor incididunt ut labore et dolore magna aliqua. ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>" +                    "<p>sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. neque porro quisquam est, qui dolorem ipsum quia dolor sit amet.</p>" +                    "<p>neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</p>"+                    '<img src=\"img/foto.jpg\" alt="photo">' +                 "</section>"; 

css ~ doesnt work

#herpderp, #herpderp img, #herpderp p {    font-size: 5rem;    visibility: hidden;    background-color: #f00; } 

css ~ work

img {    display: none; }  p {   font-size: 5rem; } 

section #herpderp dynamically created using javascript. if want style elements within section, use enclosing div select elements.

eg:

#content h1{     color: red;    font-size: 5rem; } 

you can specify styling information in javascript itself. in opinion, above method better separates styling implementation.

check : https://jsfiddle.net/3brtfto4/