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HTML string typesetting - Stack Overflow

I now have a string of HTML code, and I want to format the string. Is there any available method?

You need a js plug-in or method that can be used for conversion in the project.

For example, the original string is: 

<p><p>This is a p</p><p>This is another p</p></p>

Add spaces and newlines to become a new string:

<p>
    <p>This is a p</p>
    <p>This is another p</p>
</p>
迷茫迷茫2736 days ago797

reply all(4)I'll reply

  • 世界只因有你

    世界只因有你2017-05-24 11:38:25

    The first solution was to use regular expressions to answer the question, but it didn’t work.
    I sorted out my thoughts and have solved it perfectly (I think it is perfect). 

    function codeFormat(code, indent, tmpIndent){
    var indent = indent || '  ';
    var tmpIndent = tmpIndent || '\n';
    var preg = /<(\S*)([^>]*)>([\s\S]*?)<\/>/ig;
    return code.replace(preg, function(
    /*
    感觉没什么难度，一个循环
    遇见 >后跟<，换行
    遇见 < 缩进
    遇见 </ 取消缩进
*/
function codeFormat(code, indent){
    var indent = indent || "  ";    //缩进字符
    var tmpIndent = "";    //保存代码字符串
    var result = "", key = "", keyNext = "";
    for( var i = 0 ; i < code.length ; i++ ){
        key = code[i];
        keyNext = i < code.length-1 ? code[i+1] : "";
        if(key == "<"){
            if( keyNext == "/" ){
                tmpIndent = tmpIndent.substr(indent.length);
            }
            if( result[result.length-1] == "\n" ){
                result += tmpIndent;
            }
            if( keyNext != "/" ){
                tmpIndent += indent;
            }
        }
        result += key;
        if(key == ">" && keyNext == "<" ){
            result += "\n";
        }
    }
    return result;
}

codeFormat("<p><p>This is a p</p><p>This is another p</p></p>");
/*
<p>
  <p>This is a p</p>
  <p>This is another p</p>
</p>
*/
codeFormat('<html><head><title></title></head><body class="haha"><p style="background:#C00;"><p>This is a p</p><p>This is another p</p></p></body></html>', '    ');
/*
<html>
    <head>
        <title>
        </title>
    </head>
    <body class="haha">
        <p style="background:#C00;">
            <p>This is a p</p>
            <p>This is another p</p>
        </p>
    </body>
</html>
*/
    , , , ){
        return tmpIndent + '<' +  +  + '>'
            + codeFormat(, indent, tmpIndent + indent)
            + ( .trim().substr(0,1) == '<' ? tmpIndent : '') 
            + '</' +  + '>';
    });
}
codeFormat("<p><p>This is a p</p><p>This is anothers p</p></p><p><p>This is a p</p><p>This is another p</p></p>");
/*
<p>
  <p>This is a p</p>
  <p>This is anothers p</p>
</p>
<p>
  <p>This is a p</p>
  <p>This is another p</p>
</p>
*/
codeFormat('<html><head><title></title></head><body class="haha"><p style="background:#C00;"><p>This is a p</p><p>This is another p</p></p></body></html>', '----');
/*
<html>
----<head>
--------<title></title>
----</head>
----<body class="haha">
--------<p style="background:#C00;">
------------<p>This is a p</p>
------------<p>This is another p</p>
--------</p>
----</body>
</html>
*/

    Here is the old answer for loops:

    rrreee

    reply
    0
  • 怪我咯

    怪我咯2017-05-24 11:38:25

    Why does this question of mine keep getting downvoted? Still a good question. . . .
    @mqycn , @zhenguoli

    This is a plan written by my friend @candy: 

    import _ from 'lodash';

const splitOnTags = str => str.split(/(<\/?[^>]+>)/g).filter(line=>line.trim()!="");
const isTag = str => /<[^>!]+>/.test(str);
const isClosingTag = str => /<\/[^>]+>/.test(str);
const isSelfClosingTag = str => /<[^>]+\/>/.test(str);
const isOpeningTag = str => isTag(str) && !isClosingTag(str) && !isSelfClosingTag(str);

export default (str, indent) => {
  let depth = 0;
  indent = indent || '    ';

  return splitOnTags(str).map(item=>{
    if(isClosingTag(item)) {
      depth--;
    }

    const line = _.repeat(indent, depth) + item;

    if(isOpeningTag(item)) {
      depth++;
    } 

    return line;
  }).join('\n');
}

    reply
    0
  • 黄舟

    黄舟2017-05-24 11:38:25

    http://tool.oschina.net/codef... online. Other editors include beauty

    reply
    0
  • 伊谢尔伦

    伊谢尔伦2017-05-24 11:38:25

    1. For development tools, you can try the VSCode editor.

    https://code.visualstudio.com/

    After the installation is complete, press shift-ctrl-x to open the plug-in list, search for Beautify and install it to beautify HTML code.
    Refer to here for the corresponding settings:

    https://marketplace.visualstu...

    1. For format conversion in code, you can use HTML String Parser, such as

    https://www.npmjs.com/package...

    Or you can use cheerio to parse the DOM text and re-output it.

    3. (It is not difficult to re-create an HTML Parser, refer to my column
    http://ewind.us/2016/toy-html...

    reply
    0
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