html - Priority of Selector in CSS Rules -


let me show sample code first

<!doctype html> <html lang="en-us"> <head>     <meta charset="utf-8">     <title>css test</title>     <style type="text/css">         #tbl tr:hover{             background-color:#ffa270 !important;         }         #tbl td:nth-child(odd){             background-color:#f0ffe2;         }         .cell{             height:5ex;             width:5em;             background-color: #e2f1ff;             text-align:center;         }     </style> </head> <body>     <table id="tbl">         <tr>             <td class="cell">001</td>             <td class="cell">002</td>             <td class="cell">003</td>             <td class="cell">004</td>         </tr>         <tr>             <td class="cell">001</td>             <td class="cell">002</td>             <td class="cell">003</td>             <td class="cell">004</td>         </tr>         <tr>             <td class="cell">001</td>             <td class="cell">002</td>             <td class="cell">003</td>             <td class="cell">004</td>         </tr>         <tr>             <td class="cell">001</td>             <td class="cell">002</td>             <td class="cell">003</td>             <td class="cell">004</td>         </tr>     </table> </body> </html>

what expect: table column colored 2 colors, when mouse hover cell, whole row highlighted orange.

what code did: table column colored 2 colors, nothing happened when hovering.

i guess .cell , #tbl td more specific #tbl tr, that's why hover style ignored, don't know how fix it, please help. thanks.

you should take deeper @ specificity: http://www.standardista.com/css3/css-specificity/

#id selector = 100 "points"

.class , :pseudo-class selectors = 10 "points"

in specific case, trick:

#tbl td:nth-child(odd){     background-color:#f0ffe2; } #tbl tr:hover td.cell {     background-color:#ffa270; }

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