HTML5计时器小例子

2020-04-22 07:46:37易采站长站整理

input:valid, textarea:valid { }
input:invalid, textarea:invalid { background-color: #f0dddd; }

/* =============================================================================
Tables
========================================================================== */
table { border-collapse: collapse; border-spacing: 0; }
td { vertical-align: top; }

/* ==|== primary styles =====================================================
Author:
========================================================================== */

/* ==|== non-semantic helper classes ========================================
Please define your styles before this section.
========================================================================== */
/* For image replacement */
.ir { display: block; border: 0; text-indent: -999em; overflow: hidden; background-color: transparent; background-repeat: no-repeat; text-align: left; direction: ltr; }
.ir br { display: none; }
/* Hide from both screenreaders and browsers: h5bp.com/u */
.hidden { display: none !important; visibility: hidden; }
/* Hide only visually, but have it available for screenreaders: h5bp.com/v */
.visuallyhidden { border: 0; clip: rect(0 0 0 0); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; }
/* Extends the .visuallyhidden class to allow the element to be focusable when navigated to via the keyboard: h5bp.com/p */
.visuallyhidden.focusable:active, .visuallyhidden.focusable:focus { clip: auto; height: auto; margin: 0; overflow: visible; position: static; width: auto; }
/* Hide visually and from screenreaders, but maintain layout */
.invisible { visibility: hidden; }
/* Contain floats: h5bp.com/q */
.clearfix:before, .clearfix:after { content: “”; display: table; }
.clearfix:after { clear: both; }
.clearfix { zoom: 1; }

/* ==|== media queries ======================================================
PLACEHOLDER Media Queries for Responsive Design.
These override the primary (‘mobile first’) styles
Modify as content requires.
========================================================================== */
@media only screen and (min-width: 480px) {
/* Style adjustments for viewports 480px and over go here */
}
@media only screen and (min-width: 768px) {
/* Style adjustments for viewports 768px and over go here */
}

/* ==|== print styles =======================================================
Print styles.
Inlined to avoid required HTTP connection: h5bp.com/r
========================================================================== */
@media print {
* { background: transparent !important; color: black !important; text-shadow: none !important; filter:none !important; -ms-filter: none !important; } /* Black prints faster: h5bp.com/s */
a, a:visited { text-decoration: underline; }