第一步 搭建布局:
1.构思布局（以下是总体布局）
2.项目下新建个index.html页面,写入以下代码:
<!doctype html><html> <head> <meta charset="utf-8"> <title>markdown编辑器</title> <style type="text/css"> * { margin: 0; padding: 0; outline: none; border-radius: 0; } html, body { width: 100%; height: 100%; font-family: "helvetica neue", helvetica, arial, sans-serif; background-color: #ebebeb; } #toolbar { height: 50px; background-color: #444; width: 100%; color: #fff; line-height: 50px; } #container { overflow: auto; position: absolute; bottom: 0; left: 0; right: 0; top: 50px; } #editor-column, #preview-column { width: 49.5%; height: 100%; overflow: auto; position: relative; background-color: #fff; } .pull-left { float: left; } .pull-right { float: right; } </style> </head> <body> <div id="toolbar"></div> <div id="container"> <div id="editor-column" class="pull-left"> <div id="panel-editor"> </div> </div> <div id="preview-column" class="pull-right"> <div id="panel-preview"> </div> </div> </div> </body></html>
效果预览
第二步 引入资源实现初步效果:
1.项目下创建js文件夹
2.解从下载好的压缩包解marked/lib下的marked.js到js文件夹
3.解从下载好的压缩包解ace-builds/src到js文件夹重命名为ace
4.引入js文件
(注:markdown.css是markdown样式文件,可以自行编写或从网上下载 比如:github-markdown-css)
<!doctype html><html> <head> <meta charset='utf-8'> <title>markdown编辑器</title> <script src="js/jquery-2.1.4.min.js"></script> <script src="js/marked.js"></script> <script src="js/ace/ace.js"></script> <link href="markdown.css" rel="stylesheet" /> <!--略-->
5初始化插件
(先添加编辑区和显示区代码)
<!--略-->#mdeditor,#preview,#panel-editor,#panel-preview{ height: 100%; width: 100%; } </style> </head> <body> <div id='toolbar'></div> <div id='container'><div id='editor-column' class='pull-left'> <div id='panel-editor'> <!--编辑区--> <div class="editor-content" id="mdeditor" ></div> </div> </div> <div id='preview-column' class='pull-right'> <div id='panel-preview'> <!--显示区--> <div id="preview" class="markdown-body"></div> </div> </div> <!--略-->
(先添加初始化代码)
<!--略--><script> var acen_edit = ace.edit('mdeditor'); acen_edit.settheme('ace/theme/chrome'); acen_edit.getsession().setmode('ace/mode/markdown'); acen_edit.renderer.setshowprintmargin(false); $("#mdeditor").keyup(function() { $("#preview").html(marked(acen_edit.getvalue())); }); </script> </body></html>
效果预览
第三步 添加工具到工具栏示例:
1.编写公用方法
(其实点击工具主要是在编辑器里自动插入本来手打的符号)
function inserttext(val){ acen_edit.insert(val);//光标位置插入 } <div id='toolbar'> <button onclick="inserttext('**?**')">加粗</button> <button onclick="inserttext('_?_')">斜体</button> <button onclick="inserttext('>')">引用</button> ..... </div>
第四步 ace.js api 实现编辑器设置功能:
<div id='toolbar'> <button onclick="inserttext('**?**')">加粗</button> <button onclick="inserttext('_?_')">斜体</button> <button onclick="inserttext('>')">引用</button>
设置:
<select id="theme" size="1"> <optgroup label="bright"> <option value="ace/theme/chrome">chrome</option> <option value="ace/theme/clouds">clouds</option> <option value="ace/theme/crimson_editor">crimson editor</option> <option value="ace/theme/dawn">dawn</option> <option value="ace/theme/dreamweaver">dreamweaver</option> <option value="ace/theme/eclipse">eclipse</option> <option value="ace/theme/github">github</option> <option value="ace/theme/iplastic">iplastic</option> <option value="ace/theme/solarized_light">solarized light</option> <option value="ace/theme/textmate">textmate</option> <option value="ace/theme/tomorrow">tomorrow</option> <option value="ace/theme/xcode">xcode</option> <option value="ace/theme/kuroir">kuroir</option> <option value="ace/theme/katzenmilch">katzenmilch</option> <option value="ace/theme/sqlserver">sql server</option> </optgroup> <optgroup label="dark"> <option value="ace/theme/ambiance">ambiance</option> <option value="ace/theme/chaos">chaos</option> <option value="ace/theme/clouds_midnight">clouds midnight</option> <option value="ace/theme/cobalt">cobalt</option> <option value="ace/theme/gruvbox">gruvbox</option> <option value="ace/theme/idle_fingers">idle fingers</option> <option value="ace/theme/kr_theme">krtheme</option> <option value="ace/theme/merbivore">merbivore</option> <option value="ace/theme/merbivore_soft">merbivore soft</option> <option value="ace/theme/mono_industrial">mono industrial</option> <option value="ace/theme/monokai">monokai</option> <option value="ace/theme/pastel_on_dark">pastel on dark</option> <option value="ace/theme/solarized_dark">solarized dark</option> <option value="ace/theme/terminal">terminal</option> <option value="ace/theme/tomorrow_night">tomorrow night</option> <option value="ace/theme/tomorrow_night_blue">tomorrow night blue</option> <option value="ace/theme/tomorrow_night_bright">tomorrow night bright</option> <option value="ace/theme/tomorrow_night_eighties">tomorrow night 80s</option> <option value="ace/theme/twilight">twilight</option> <option value="ace/theme/vibrant_ink">vibrant ink</option> </optgroup> </select> 字体大小 <select id="fontsize" size="1"> <option value="10px">10px</option> <option value="11px">11px</option> <option value="12px" selected="selected">12px</option> <option value="13px">13px</option> <option value="14px">14px</option> <option value="16px">16px</option> <option value="18px">18px</option> <option value="20px">20px</option> <option value="24px">24px</option> </select> 代码折行 <select id="folding" size="1"> <option value="manual">manual</option> <option value="markbegin" selected="selected">mark begin</option> <option value="markbeginend">mark begin and end</option> </select> 自动换行 <select id="soft_wrap" size="1"> <option value="off">off</option> <option value="40">40 chars</option> <option value="80">80 chars</option> <option value="free">free</option> </select> 全选样式<input type="checkbox" name="select_style" id="select_style" checked=""> 光标行高光<input type="checkbox" name="highlight_active" id="highlight_active" checked=""> 显示行号<input type="checkbox" id="show_gutter" checked=""> 打印边距<input type="checkbox" id="show_print_margin" checked=""> </div><!---略--->...... $("#theme").change(function() { acen_edit.settheme($(this).val()); }) $("#fontsize").change(function() { acen_edit.setfontsize($(this).val()); }) $("#folding").change(function() { session.setfoldstyle($(this).val()); }) $("#select_style").change(function() { acen_edit.setoption("selectionstyle", this.checked ? "line" : "text"); }) $("#highlight_active").change(function() { acen_edit.sethighlightactiveline(this.checked); }) $("#soft_wrap").change(function() { acen_edit.setoption("wrap", $(this).val()); }) $("#show_print_margin").change(function() { acen_edit.renderer.setshowprintmargin(this.checked);
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以上就是纯前端技术做实时预览的markdown编辑器的详细内容。