a in the above code The element can cover the b element. Let’s look at a code example: <\/p>
螞蟻部落<\/title><style type=\"text\/css\">div{ width:100px; height:100px;}.a{ position:relative; right:20px; top:20px; background-color:red; z-index:-1;}.b{ background-color:green;}<\/style><\/head><body> <h1><a href="http://www.miracleart.cn/">国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂</a></h1> <div id="377j5v51b" class=\"a\"><\/div> <div id="377j5v51b" class=\"b\"><\/div><\/body><\/html><\/pre> <\/p> <p>The above code shows that the b element can cover the a element, which means that elements in the ordinary document flow can be covered. 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href="http://www.miracleart.cn/" title="Home" class="phpgenera_Details_mainL1a">Home</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://www.miracleart.cn/web-designer.html" class="phpgenera_Details_mainL1a">Web Front-end</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://www.miracleart.cn/div-tutorial.html" class="phpgenera_Details_mainL1a">HTML Tutorial</a> <img src="/static/imghw/top_right.png" alt="" /> <span>The effect of negative z-index attribute value_html/css_WEB-ITnose</span> </div> <div id="377j5v51b" class="Articlelist_txts"> <div id="377j5v51b" class="Articlelist_txts_info"> <h1 class="Articlelist_txts_title">The effect of negative z-index attribute value_html/css_WEB-ITnose</h1> <div id="377j5v51b" class="Articlelist_txts_info_head"> <div id="377j5v51b" class="author_info"> <a href="http://www.miracleart.cn/member/887227.html" class="author_avatar"> <img class="lazy" data-src="https://img.php.cn/upload/avatar/000/887/227/63bb7851c9547215.jpg" src="/static/imghw/default1.png" alt="WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB"> </a> <div id="377j5v51b" class="author_detail"> <a href="http://www.miracleart.cn/member/887227.html" class="author_name">WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB</a> </div> </div> </div> <span id="377j5v51b" class="Articlelist_txts_time">Jun 24, 2016 am 11:41 AM</span> </div> </div> <hr /> <div id="377j5v51b" class="article_main php-article"> <div id="377j5v51b" class="article-list-left detail-content-wrap content"> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-5902227090019525" data-ad-slot="3461856641"> </ins> <p class="sycode"> </p> <p class="sycode"> </p> <p><strong>The effect of negative z-index attribute value:</strong></p> <p>In many CSS codes, you can see that the z-index attribute value is set to a negative number. In this case, let’s briefly introduce the performance when the value of this attribute is negative. Under normal circumstances, as long as the object has the position attribute set and the attribute value is not static, then this object can cover the non-positioned object. The code example is as follows: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'><!DOCTYPE html><html><head><meta charset="utf-8"><meta name="author" content="http://www.51texiao.cn/" /><title>螞蟻部落</title><style type="text/css">div{ width:100px; height:100px;}.a{ position:relative; right:20px; top:20px; background-color:red; z-index:1;}.b{ background-color:green;}</style></head><body> <div class="a"></div> <div class="b"></div></body></html></pre> </p> <p>a in the above code The element can cover the b element. Let’s look at a code example: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'><!DOCTYPE html><html><head><meta charset="utf-8"><meta name="author" content="http://www.51texiao.cn/" /><title>螞蟻部落</title><style type="text/css">div{ width:100px; height:100px;}.a{ position:relative; right:20px; top:20px; background-color:red; z-index:-1;}.b{ background-color:green;}</style></head><body> <div class="a"></div> <div class="b"></div></body></html></pre> </p> <p>The above code shows that the b element can cover the a element, which means that elements in the ordinary document flow can be covered. The position attribute is set, the attribute value is not static, and the z-index value is a negative number. </p> <p>The original address is: http://www.51texiao.cn/div_cssjiaocheng/2015/0503/583.html</p> <p>The most original address is: http://www.softwhy.com/ </p> <p class="sycode"></p> <p class="sycode"></p> <p class="sycode"> </p> <p class="sycode"></p> <p class="sycode"></p> <p class="sycode"> </p> <p class="sycode"></p> <p class="sycode"></p> </div> </div> <div id="377j5v51b" class="wzconShengming_sp"> <div id="377j5v51b" class="bzsmdiv_sp">Statement of this Website</div> <div>The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. 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