话不多说直接上代码
将下面的代码复制,保存为html文件在游览器中打开即可使用
按 ctrl+p 也可转pdf js实现的pdf实际为截图后保存为pdf
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>md2html</title>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/marked/0.3.4/marked.min.js"></script>
<script src="https://linwalker.github.io/render-html-to-pdf/js/html2canvas.js"></script>
<script src="https://linwalker.github.io/render-html-to-pdf/js/jsPdf.debug.js"></script>
<script src="http://cdn.bootcss.com/highlight.js/8.0/highlight.min.js"></script>
<style>
.hljs-comment,.hljs-quote {
color:#989498
}
.hljs-variable,.hljs-template-variable,.hljs-attribute,.hljs-tag,.hljs-name,.hljs-selector-id,.hljs-selector-class,.hljs-regexp,.hljs-link,.hljs-deletion {
color:#dd464c
}
.hljs-number,.hljs-built_in,.hljs-builtin-name,.hljs-literal,.hljs-type,.hljs-params {
color:#fd8b19
}
.hljs-class .hljs-title {
color:#fdcc59
}
.hljs-string,.hljs-symbol,.hljs-bullet,.hljs-addition {
color:#8fc13e
}
.hljs-meta {
color:#149b93
}
.hljs-function,.hljs-section,.hljs-title {
color:#1290bf
}
.hljs-keyword,.hljs-selector-tag {
color:#c85e7c
}
.hljs {
display:block;
background:#322931;
color:#b9b5b8;
padding:0.5em
}
.hljs-emphasis {
font-style:italic
}
.hljs-strong {
font-weight:bold
}
#edit {display: flex; justify-content: space-between;}
#content {width: 49%;float: left;height: auto;}
.button {
color: #fff;
background-color: #009a61;
border-color: #008151;
padding: 0 13px;
font-size: 14px;
border-radius: 4px;
margin: 10px;
}
#show{width: 50%; border: 1px solid #ddd; padding: 50px; box-sizing: border-box;float: left;height: auto;}
@charset "utf-8";
#showHtml {
border: 0 none;
margin: 0 auto;
max-width: 850px;
overflow-x: hidden;
padding-bottom: 50px;
position: relative;
}
html {
color: #333;
background: #fff;
-webkit-text-size-adjust: 100%;
-ms-text-size-adjust: 100%;
text-rendering: optimizelegibility;
}
html.borderbox *, html.borderbox *:before, html.borderbox *:after {
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
}
body, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td, hr, button, article, aside, details, figcaption, figure, footer, header, menu, nav, section {
margin: 0;
padding: 0;
}
article, aside, details, figcaption, figure, footer, header, menu, nav, section {
display: block;
}
audio, canvas, video {
display: inline-block;
}
body, button, input, select, textarea {
font: 300 1em/1.8 PingFang SC, Lantinghei SC, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
}
button::-moz-focus-inner,
input::-moz-focus-inner {
padding: 0;
border: 0;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
fieldset, img {
border: 0;
}
blockquote {
position: relative;
color: #999;
font-weight: 400;
border-left: 1px solid #1abc9c;
padding-left: 1em;
margin: 1em 3em 1em 2em;
}
@media only screen and ( max-width: 640px ) {
blockquote {
margin: 1em 0;
}
}
acronym, abbr {
border-bottom: 1px dotted;
font-variant: normal;
}
abbr {
cursor: help;
}
/* 一致的 del 样式 */
del {
text-decoration: line-through;
}
address, caption, cite, code, dfn, em, th, var {
font-style: normal;
font-family: "Comic Sans MS", Monaco, Courier, "Courier New", monospace;
font-size: 15px;
}
ul, ol {
list-style: none;
}
caption, th {
text-align: left;
}
q:before, q:after {
content: '';
}
/* 统一上标和下标 */
sub, sup {
font-size: 75%;
line-height: 0;
position: relative;
}
:root sub, :root sup {
vertical-align: baseline; /* for ie9 and other modern browsers */
}
sup {
top: -0.5em;
}
sub {
bottom: -0.25em;
}
a {
color: #1abc9c;
}
a:hover {
text-decoration: underline;
}
.typo a {
border-bottom: 1px solid #1abc9c;
}
.typo a:hover {
border-bottom-color: #555;
color: #555;
text-decoration: none;
}
ins, a {
text-decoration: none;
}
u, .typo-u {
text-decoration: underline;
}
mark {
background: #fffdd1;
border-bottom: 1px solid #ffedce;
padding: 2px;
margin: 0 5px;
}
pre, code, pre tt {
font-family: "Comic Sans MS", Monaco, Courier, "Courier New", monospace;
}
pre {
background: #f3f5f0;
border: 1px solid #ddd;
padding: 1em 1.5em;
display: block;
-webkit-overflow-scrolling: touch;
}
hr {
border: none;
border-bottom: 1px solid #cfcfcf;
margin-bottom: 0.8em;
height: 10px;
}
small, .typo-small,
figcaption {
font-size: 0.9em;
color: #888;
}
strong, b {
font-weight: bold;
color: #000;
}
[draggable] {
cursor: move;
}
.clearfix:before, .clearfix:after {
content: "";
display: table;
}
.clearfix:after {
clear: both;
}
.clearfix {
zoom: 1;
}
.textwrap, .textwrap td, .textwrap th {
word-wrap: break-word;
word-break: break-all;
}
.textwrap-table {
table-layout: fixed;
}
.serif {
font-family: Palatino, Optima, Georgia, serif;
}
.typo p, .typo pre, .typo ul, .typo ol, .typo dl, .typo form, .typo hr, .typo table,
.typo-p, .typo-pre, .typo-ul, .typo-ol, .typo-dl, .typo-form, .typo-hr, .typo-table, blockquote {
margin-bottom: 1.2em;
}
.typo p {
text-indent: 2em;
}
.typo code {
color: #c7254e;
font-size: .92857em;
background-color: #f3f3f3;
}
.typo pre code{
color: #333;
}
h1, h2, h3, h4, h5, h6 {
font-family: PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
font-weight: 100;
color: #000;
line-height: 1.35;
}
.typo h1, .typo h2, .typo h3, .typo h4, .typo h5, .typo h6,
.typo-h1, .typo-h2, .typo-h3, .typo-h4, .typo-h5, .typo-h6 {
margin-top: 1.2em;
margin-bottom: 0.6em;
line-height: 1.35;
}
.typo h1, .typo-h1 {
font-size: 2em;
}
.typo h2, .typo-h2 {
font-size: 1.8em;
}
.typo h3, .typo-h3 {
font-size: 1.6em;
}
.typo h4, .typo-h4 {
font-size: 1.4em;
}
.typo h5, .typo h6, .typo-h5, .typo-h6 {
font-size: 1.2em;
}
.typo ul, .typo-ul {
margin-left: 1.3em;
list-style: disc;
}
.typo ol, .typo-ol {
list-style: decimal;
margin-left: 1.9em;
}
.typo li ul, .typo li ol, .typo-ul ul, .typo-ul ol, .typo-ol ul, .typo-ol ol {
margin-bottom: 0.8em;
margin-left: 2em;
}
.typo li ul, .typo-ul ul, .typo-ol ul {
list-style: circle;
}
.typo table th, .typo table td, .typo-table th, .typo-table td, .typo table caption {
border: 1px solid #ddd;
padding: 0.5em 1em;
color: #666;
}
.typo table th, .typo-table th {
background: #fbfbfb;
}
.typo table thead th, .typo-table thead th {
background: #f1f1f1;
}
.typo table caption {
border-bottom: none;
}
.typo-input, .typo-textarea {
-webkit-appearance: none;
border-radius: 0;
}
.typo-em, .typo em, legend, caption {
color: #000;
font-weight: inherit;
}
.typo-em {
position: relative;
}
.typo-em:after {
position: absolute;
top: 0.65em;
left: 0;
width: 100%;
overflow: hidden;
white-space: nowrap;
text-indent: 0;
content: "・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・";
}
/* Responsive images */
.typo img {
max-width: 100%;
}
</style>
</head>
<body id="edit">
<div><button id="download" class="button">下载html</button><button class="button" id="downloadPdf">下载PDF</button></div>
<textarea id="content"></textarea>
<div id="show" class="typo"></div>
<script>
marked.setOptions({
renderer: new marked.Renderer(),
gfm: true,
tables: true,
escaped : true,
breaks: false,
pedantic: false,
sanitize: false,
smartLists: true,
smartypants: false,
highlight: function (code, lang) {
return hljs.highlightAuto(code).value;
}
});
$("#content").on("input propertychange", function() {
var val = $(this).val();
$("#show").html(marked(val));
});
function downloadFile(fileName, content){
var aLink = document.createElement('a');
var blob = new Blob([content]);
var evt = document.createEvent("HTMLEvents");
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.click();
}
$("#download").click(e=>{
var tpl = new Template($('#tpl').html());
var s = tpl.render({
title: "markdown",
style:$("style").html(),
content:$("#show").html()
});
downloadFile("markdown.html",s);
});
function Template(tpl) {
var
fn,
match,
code = ['var r=[];\nvar _html = function (str) { return str; };'],
re = /\{\s*([a-zA-Z\.\_0-9()]+)(\s*\|\s*safe)?\s*\}/m,
addLine = function (text) {
code.push('r.push(\'' + text.replace(/\'/g, '\\\'').replace(/\n/g, '\\n').replace(/\r/g, '\\r') + '\');');
};
while (match = re.exec(tpl)) {
if (match.index > 0) {
addLine(tpl.slice(0, match.index));
}
if (match[2]) {
code.push('r.push(String(this.' + match[1] + '));');
}
else {
code.push('r.push(_html(String(this.' + match[1] + ')));');
}
tpl = tpl.substring(match.index + match[0].length);
}
addLine(tpl);
code.push('return r.join(\'\');');
fn = new Function(code.join('\n'));
this.render = function (model) {
return fn.apply(model);
};
}
$("#downloadPdf").click(e=>{
html2canvas($('#show')[0], {
onrendered:function(canvas) {
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = contentWidth / 592.28 * 841.89;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89],html页面生成的canvas在pdf中图片的宽高
var imgWidth = 595.28;
var imgHeight = 592.28/contentWidth * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new jsPDF('', 'pt', 'a4');
//有两个高度需要区分,一个是html页面的实际高度,和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围,无需分页
if (leftHeight < pageHeight) {
pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight );
} else {
while(leftHeight > 0) {
pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
leftHeight -= pageHeight;
position -= 841.89;
//避免添加空白页
if(leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save('content.pdf');
}
})
});
</script>
<script id="tpl" type="text/plain">
<html>
<head>
<title>{title}</title>
<style>{style}</style>
</head>
<body>
<div id="showHtml" class="typo">
{content}
</div>
</body>
</html>
</script>
</body>
</html>