css - Going from 2 to 3 columns when expanding the width of screen -

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when screen expands past width i'd add column unordered list items, 2 columns 3 columns. i'm not sure how this? bootstrap seems has solution i've never used it. here jsfiddle: http://jsfiddle.net/en9qm/

the html

<div class="sidebar">    <div class="search-filters">filters</div>    <div class="search-results">       <div class="listings">          <ul>             <li>hello</li>             <li>byebye</li>             <li>chuck</li>             <li>paul</li>          </ul>       </div>       <div class="listings-footer"></div>    </div> </div>

the css

.sidebar {    position: fixed;    top: 47px;    right: 0;    bottom: 0;    width: 60 % ;    overflow - y: scroll;    /*-webkit-overflow-scrolling: touch;     background: #f7f7f7;*/    background - color: aqua;    /*border: 3px solid black;*/ }    .search - filters {       background - color: white;       height: 40 % ; }    .search - results {       padding: 10px 0 20px 20px;       border: 3px solid black;       height: 100 % ; }    .listings {       border: 3px solid red;       height: 100 % ; }    .listings - footer {       border: 3px solid blue;       /*height: 92px;     height: 100%;*/ } ul {    /*width:100%;*/    list - style - type: none;    /*height: 100%;*/    background - color: pink; } li {    background: green;    float: left;    height: 250px;    margin: 0 10px 10px 0;    width: 45 % ; }@ media(min - width: 1200px) {    li {       width: 25 % ;    } } li: nth - child(even) {    margin - right: 0; }

you on right track media query. have change width inside it.

@media (min-width: 1200px) {     li, li:nth-child(even) {         width:30%;         margin-right: 3.33%;     } }

(see jsfiddle) means when screen @ least 1200px wide, columns occupy 30% of container, plus 3.33% of right margin. overrode li:nth-child(even) second column have right margin well.

bootstrap uses grid system of 12 columns, 12 columns means 100% of parent's width. is, if element has class col-lg-6 col-sm-3, means in large (lg) screens, element have width: 50% (6 columns out of 12 total, that's 1/2), , in small (sm) screens, have width: 25% (3 columns out of 12 total, that's 1/4).

in case, li elements should have class col-lg-4 col-md-6, means take 1/3 of parent's width in large screens , 1/2 in medium-width devices. (large means screens wider 1200px, , media means screens between 992px , 1199px. sizes documented here.)

check jsfiddle. notice because didn't specify col-sm-x class, in small screens default every li takes 100% of width. can force specifying class each screen size, if want. (all easier understand once read bootstrap documentation.)

using bootstrap can avoid lot of media queries , focus in keeping css shorter , clearer.


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