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| <polymer-element name="mark-down-editor"> | |
| <template> | |
| <style> | |
| #markup, #markdown { | |
| width: 50%; | |
| float: left; | |
| } | |
| #editor { | |
| width: 80%; | |
| height: 250px; | |
| } | |
| </style> | |
| <div id="markup"> | |
| <textarea id="editor" on-keyup="render" value="{{ text }}"></textarea> | |
| </div> | |
| <div id="markdown"></div> | |
| </template> | |
| <script> | |
| (function() { | |
| var mo = new MutationObserver(function(mutations) { | |
| mutations.forEach(function(mut) { | |
| // the mutation target will be the <mark-down> element | |
| mut.target.render(); | |
| }); | |
| }); | |
| function observe(element) { | |
| mo.observe(element, {childList: true}); | |
| } | |
| Polymer("mark-down-editor", { | |
| created: function() { | |
| observe(this); | |
| this.text = this.trim(this.innerHTML); | |
| this.render(); | |
| }, | |
| render: function() { | |
| var parsed = markdown.toHTML(this.text); | |
| this.$.markdown.innerHTML = parsed; | |
| }, | |
| // Thanks Ryan Seddon! (https://github.com/ryanseddon/markdown-component) | |
| // Remove all leading/trailing whitespace so it's not confused as | |
| // a code block | |
| trim: function(str) { | |
| var cleaned = str.split('\n').map(function(x) { | |
| return x.trim(); | |
| }).join('\n'); | |
| return cleaned; | |
| } | |
| }); | |
| })(); | |
| </script> | |
| </polymer-element> |
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