背景
纯粹为了在自己博客实现一个代码编辑器，方便在线测试各种代码。
ace介绍
ACE 是一个开源的、独立的、基于浏览器的代码编辑器，可以嵌入到任何web页面或JavaScript应用程序中。ACE支持超过60种语言语法高亮，并能够处理代码多达400万行的大型文档。ACE开发团队称，ACE在性能和功能上可以媲美本地代码编辑器（如Sublime Text、TextMate和Vim等）。
步骤
1.编写代码编辑器样式
屏幕快照 2018-09-21 下午8.21.06.png
2.引入ace.js
<script type="text/javascript" src="./src-noconflict/ace.js"></script>
<script type="text/javascript" src="./src-noconflict/ext-language_tools.js"></script>
**3.调用ace api实现代码编辑功能
<script type="text/javascript">
(function() {
var editor1 = ace.edit("editor1", {
theme: "ace/theme/monokai",
mode: "ace/mode/html",
wrap: true,
autoScrollEditorIntoView: true,
enableBasicAutocompletion: true,
enableSnippets: true,
enableLiveAutocompletion: true
});
var editor2 = ace.edit("editor2", {
theme: "ace/theme/monokai",
mode: "ace/mode/css",
autoScrollEditorIntoView: true,
enableBasicAutocompletion: true,
enableSnippets: true,
enableLiveAutocompletion: true
});
var editor3 = ace.edit("editor3", {
theme: "ace/theme/monokai",
mode: "ace/mode/javascript",
autoScrollEditorIntoView: true,
enableBasicAutocompletion: true,
enableSnippets: true,
enableLiveAutocompletion: true
});
var submit = document.querySelector('#submit');
submit.addEventListener('click', function() {
var htmlValue = editor1.getValue();
var cssValue = editor2.getValue();
var jsValue = editor3.getValue();
var htmlStr = '<!DOCTYPE html>' +
'<html>' +
'<head>' +
'<meta charset="utf-8" />' +
'<title>代码测试</title>' +
'<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>' +
'<meta name="format-detection" content="telephone=no" />' +
'<meta name="apple-mobile-web-app-status-bar-style" content="black" />' +
'<meta name="apple-mobile-web-app-capable" content="yes" />' +
'<meta http-equiv="X-UA-Compatible" content="chrome=1,IE=edge"/>' +
'<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0"/>' +
'<style type="text/css">' +
cssValue +
'</style>' +
'<script type="text/javascript" src="https://cdn.bootcss.com/vConsole/3.2.0/vconsole.min.js">' +
'</' +
'script>' +
'<script type="text/javascript">' +
'new window.VConsole();' +
'</' +
'script>' +
'</head>' +
'<body>' +
htmlValue +
'<script type="text/javascript">' +
jsValue +
'</' +
'script>' +
'</body>' +
'</html>';
document.getElementById('preview').srcdoc = htmlStr;
})
})()
**4.将写好的代码放入iframe中运行
document.getElementById('preview').srcdoc = htmlStr;
