CSS3里怎么实现提示文字的弹窗效果

[data-tips] { position: relative; text-decoration: none; } [data-tips]:after, [data-tips]:before { position: absolute; z-index: 100; opacity: 0; } [data-tips]:after { content: attr(data-tips); height: 25px; line-height: 25px; padding: 0 10px; font-size: 12px; text-align: center; color: #fff; background: #222; border-radius: 5px; text-shadow: 0 0 5px #000; -moz-box-shadow: 0 0 5px rgba(0,0,0,0.3); -webkit-box-shadow: 0 0 5px rgba(0,0,0,0.3); box-shadow: 0 0 5px rgba(0,0,0,0.3); white-space: nowrap; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; box-sizing: border-box; } [data-tips]:before { content: ""; width: 0; height: 0; border-width: 6px; border-style: solid; } [data-tips]:hover:after, [data-tips]:hover:before { opacity: 1; } /* Top tips */ [data-tips].top-tip:after, [data-tips].top-tip:before { -webkit-transition: bottom 0.25s ease-in-out, opacity 0.25s ease-in-out; -moz-transition: bottom 0.25s ease-in-out, opacity 0.25s ease-in-out; transition: bottom 0.25s ease-in-out, opacity 0.25s ease-in-out; bottom: 90%; left: -9999px; margin-bottom: 12px; } [data-tips].top-tip:before { border-color: #222 transparent transparent transparent; margin-bottom: 0; } [data-tips].top-tip:hover:after, [data-tips].top-tip:hover:before { bottom: 100%; left: 0; } [data-tips].top-tip:hover:before { left: 15px; } /* Bottom tip */ [data-tips].bottom-tip:after, [data-tips].bottom-tip:before { -webkit-transition: top 0.25s ease-in-out, opacity 0.25s ease-in-out; -moz-transition: top 0.25s ease-in-out, opacity 0.25s ease-in-out; transition: top 0.25s ease-in-out, opacity 0.25s ease-in-out; top: 90%; left: -9999px; margin-top: 12px; } [data-tips].bottom-tip:before { border-color: transparent transparent #222 transparent; margin-top: 0; } [data-tips].bottom-tip:hover:after, [data-tips].bottom-tip:hover:before { top: 100%; left: 0; } [data-tips].bottom-tip:hover:before { left: 15px; } /* Right tip */ [data-tips].right-tip:after, [data-tips].right-tip:before { -webkit-transition: left 0.25s ease-in-out, opacity 0.25s ease-in-out; -moz-transition: left 0.25s ease-in-out, opacity 0.25s ease-in-out; transition: left 0.25s ease-in-out, opacity 0.25s ease-in-out; top: -9999px; left: 96%; margin-left: 12px; } [data-tips].right-tip:before { border-color: transparent #222 transparent transparent; margin-left: 0; } [data-tips].right-tip:hover:after, [data-tips].right-tip:hover:before { left: 100%; top: 0; } [data-tips].right-tip:hover:before { top: 7px; } /* Left tip */ [data-tips].left-tip:after, [data-tips].left-tip:before { -webkit-transition: right 0.25s ease-in-out, opacity 0.25s ease-in-out; -moz-transition: right 0.25s ease-in-out, opacity 0.25s ease-in-out; transition: right 0.25s ease-in-out, opacity 0.25s ease-in-out; top: -9999px; right: 96%; margin-right: 12px; } [data-tips].left-tip:before { border-color: transparent transparent transparent #222; margin-right: 0; } [data-tips].left-tip:hover:after, [data-tips].left-tip:hover:before { right: 100%; top: 0; } [data-tips].left-tip:hover:before { top: 7px; }

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