Introduction to html5 forms, select drop-down, and textarea multi-line text

There are many

attributes under the drop-down

##name In fact, if there is a name, then there is a value, because the button is submitted in the format of name=value. If you do not write the value, what is submitted will be the

string# of the option.

## is actually similar to the

list

of input, both require option and value can be omitted, but assignment is generally used for database storage and Call. The database is more efficient for numeric index

##size No need to pull down, it seems Taobao sellers select the same product category list...

optgroup This is not an attribute, it is just a node with multiple layers of options. There are many tags used to divide nodes in this way. For example, hgroup is used to organize titles, and

optgroup is used to organize data classification. Of course, this is only for performance, and the actual classification is still in the database.

三三Group

, this is the combined force of optgroup and label.

multiple Multiple selection After it is true, you can press ctrl to select multiple lines

, and the necessary condition is still within the <form> double box. </p> <p><span style="font-size: 16pt"></span>Because it is not within the form double box, the button cannot submit the name and value. Of course, sometimes it will fail, close it and try again. Open the page or refresh it with ctrl+F5. </p> <p style="margin-left: 36pt"><span style="font-size: 16pt"> </span></p> <p></p>##rows cols wrap is a textarea-specific setting<p><img src="https://img.php.cn/upload/article/000/001/506/29eb9dd654e8db0464759bf438c1fa6e-9.png" alt=""> </p> <p> </p><p>The above is the detailed content of Introduction to html5 forms, select drop-down, and textarea multi-line text. For more information, please follow other related articles on the PHP Chinese website!</p></div><div class="nphpQianMsg"><div class="clear"></div></div><div class="nphpQianSheng"><span>Statement：</span><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. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn</div></div></div><div class="nphpSytBox"><span>Previous article：<a class="dBlack" title="Detailed explanation of the use of html5 escaped entity characters" href="http://m.php.cn/faq/367700.html">Detailed explanation of the use of html5 escaped entity characters</a></span><span>Next article：<a class="dBlack" title="Detailed explanation of the use of html5 escaped entity characters" href="http://m.php.cn/faq/367703.html">Detailed explanation of the use of html5 escaped entity characters</a></span></div><div class="nphpSytBox2"><div class="nphpZbktTitle"><h2>Related articles</h2><em><a href="http://m.php.cn/article.html" class="bBlack"><i>See more</i><b></b></a></em><div class="clear"></div></div><ul class="nphpXgwzList"><li><b></b><a href="http://m.php.cn/faq/348281.html" title="AlloyTouch full-screen scrolling plug-in creates a smooth H5 page in 30 seconds" class="aBlack">AlloyTouch full-screen scrolling plug-in creates a smooth H5 page in 30 seconds</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348372.html" title="HTML5 actual combat and analysis of touch events (touchstart, touchmove and touchend)" class="aBlack">HTML5 actual combat and analysis of touch events (touchstart, touchmove and touchend)</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348373.html" title="Detailed explanation of image drawing examples in HTML5 canvas 9" class="aBlack">Detailed explanation of image drawing examples in HTML5 canvas 9</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348374.html" title="Regular expressions and new HTML5 elements" class="aBlack">Regular expressions and new HTML5 elements</a><div class="clear"></div></li><li><b></b><a href="http://m.php.cn/faq/348469.html" title="How to combine NodeJS and HTML5 to drag and drop multiple files to upload to the server" class="aBlack">How to combine NodeJS and HTML5 to drag and drop multiple files to upload to the server</a><div class="clear"></div></li></ul></div></div><div class="nphpFoot"><div class="nphpFootBg"><ul class="nphpFootMenu"><li><a href="http://m.php.cn/"><b class="icon1"></b><p>Home</p></a></li><li><a href="http://m.php.cn/course.html"><b class="icon2"></b><p>Course</p></a></li><li><a href="http://m.php.cn/wenda.html"><b class="icon4"></b><p>Q&A</p></a></li><li><a href="http://m.php.cn/login"><b class="icon5"></b><p>My</p></a></li><div class="clear"></div></ul></div></div><div class="nphpYouBox" style="display: none;"><div class="nphpYouBg"><div class="nphpYouTitle"><span onclick="$('.nphpYouBox').hide()"></span><a href="http://m.php.cn/"></a><div class="clear"></div></div><ul class="nphpYouList"><li><a href="http://m.php.cn/"><b class="icon1"></b><span>Home</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/course.html"><b class="icon2"></b><span>Course</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/article.html"><b class="icon3"></b><span>Article</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/wenda.html"><b class="icon4"></b><span>Q&A</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/dic.html"><b class="icon6"></b><span>Dictionary</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/course/type/99.html"><b class="icon7"></b><span>Manual</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/xiazai/"><b class="icon8"></b><span>Download</span><div class="clear"></div></a></li><li><a href="http://m.php.cn/faq/zt" title="Topic"><b class="icon12"></b><span>Topic</span><div class="clear"></div></a></li><div class="clear"></div></ul></div></div><div class="nphpDing" style="display: none;"><div class="nphpDinglogo"><a href="http://m.php.cn/"></a></div><div class="nphpNavIn1"><div class="swiper-container nphpNavSwiper1"><div class="swiper-wrapper"><div class="swiper-slide"><a href="http://m.php.cn/" >Home</a></div><div class="swiper-slide"><a href="http://m.php.cn/article.html" class="hover">Article</a></div><div class="swiper-slide"><a href="http://m.php.cn/wenda.html" >Q&A</a></div><div class="swiper-slide"><a href="http://m.php.cn/course.html" >Course</a></div><div class="swiper-slide"><a href="http://m.php.cn/faq/zt" >Topic</a></div><div class="swiper-slide"><a href="http://m.php.cn/xiazai" >Download</a></div><div class="swiper-slide"><a href="http://m.php.cn/game" >Game</a></div><div class="swiper-slide"><a href="http://m.php.cn/dic.html" >Dictionary</a></div><div class="clear"></div></div></div><div class="langadivs" ><a href="javascript:;" class="bg4 bglanguage"></a><div class="langadiv" ><a onclick="javascript:setlang('zh-cn');" class="language course-right-orders chooselan " href="javascript:;"><span>简体中文</span><span>（ZH-CN）</span></a><a onclick="javascript:;" class="language course-right-orders chooselan chooselanguage" href="javascript:;"><span>English</span><span>（EN）</span></a><a onclick="javascript:setlang('zh-tw');" class="language course-right-orders chooselan " href="javascript:;"><span>繁体中文</span><span>（ZH-TW）</span></a><a onclick="javascript:setlang('ja');" class="language course-right-orders chooselan " href="javascript:;"><span>日本語</span><span>（JA）</span></a><a onclick="javascript:setlang('ko');" class="language course-right-orders chooselan " href="javascript:;"><span>한국어</span><span>（KO）</span></a><a onclick="javascript:setlang('ms');" class="language course-right-orders chooselan " href="javascript:;"><span>Melayu</span><span>（MS）</span></a><a onclick="javascript:setlang('fr');" class="language course-right-orders chooselan " href="javascript:;"><span>Français</span><span>（FR）</span></a><a onclick="javascript:setlang('de');" class="language course-right-orders chooselan " href="javascript:;"><span>Deutsch</span><span>（DE）</span></a></div></div><script> var swiper = new Swiper('.nphpNavSwiper1', { slidesPerView : 'auto', observer: true,//修改swiper自己或子元素时，自动初始化swiper observeParents: true,//修改swiper的父元素时，自动初始化swiper }); </script></div></div><!--顶部导航 end--><script>isLogin = 0;</script><script type="text/javascript" src="/static/layui/layui.js"></script><script type="text/javascript" src="/static/js/global.js?4.9.47"></script></div><script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script><link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css' type='text/css' media='all'/><script type='text/javascript' src='/static/js/viewer.min.js?1'></script><script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script><script>jQuery.fn.wait = function (func, times, interval) { var _times = times || -1, //100次 _interval = interval || 20, //20毫秒每次 _self = this, _selector = this.selector, //选择器 _iIntervalID; //定时器id if( this.length ){ //如果已经获取到了，就直接执行函数 func && func.call(this); } else { _iIntervalID = setInterval(function() { if(!_times) { //是0就退出 clearInterval(_iIntervalID); } _times <= 0 || _times--; //如果是正数就 -- _self = $(_selector); //再次选择 if( _self.length ) { //判断是否取到 func && func.call(_self); clearInterval(_iIntervalID); } }, _interval); } return this; } $("table.syntaxhighlighter").wait(function() { $('table.syntaxhighlighter').append("<p class='cnblogs_code_footer'><span class='cnblogs_code_footer_icon'></span></p>"); }); $(document).on("click", ".cnblogs_code_footer",function(){ $(this).parents('table.syntaxhighlighter').css('display','inline-table');$(this).hide(); }); $('.nphpQianCont').viewer({navbar:true,title:false,toolbar:false,movable:false,viewed:function(){$('img').click(function(){$('.viewer-close').trigger('click');});}}); </script></body></html>