问有人知道AutoFormat在CodeMirror中的特性发生了什么吗？

EN

(function() {

  CodeMirror.extendMode("css", {
    commentStart: "/*",
    commentEnd: "*/",
    newlineAfterToken: function(_type, content) {
      return /^[;{}]$/.test(content);
    }
  });

  CodeMirror.extendMode("javascript", {
    commentStart: "/*",
    commentEnd: "*/",
    // FIXME semicolons inside of for
    newlineAfterToken: function(_type, content, textAfter, state) {
      if (this.jsonMode) {
        return /^[\[,{]$/.test(content) || /^}/.test(textAfter);
      } else {
        if (content == ";" && state.lexical && state.lexical.type == ")") return false;
        return /^[;{}]$/.test(content) && !/^;/.test(textAfter);
      }
    }
  });

  var inlineElements = /^(a|abbr|acronym|area|base|bdo|big|br|button|caption|cite|code|col|colgroup|dd|del|dfn|em|frame|hr|iframe|img|input|ins|kbd|label|legend|link|map|object|optgroup|option|param|q|samp|script|select|small|span|strong|sub|sup|textarea|tt|var)$/;

  CodeMirror.extendMode("xml", {
    commentStart: "<!--",
    commentEnd: "-->",
    newlineAfterToken: function(type, content, textAfter, state) {
      var inline = false;
      if (this.configuration == "html")
        inline = state.context ? inlineElements.test(state.context.tagName) : false;
      return !inline && ((type == "tag" && />$/.test(content) && state.context) ||
                         /^</.test(textAfter));
    }
  });

  // Comment/uncomment the specified range
  CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
    var cm = this, curMode = CodeMirror.innerMode(cm.getMode(), cm.getTokenAt(from).state).mode;
    cm.operation(function() {
      if (isComment) { // Comment range
        cm.replaceRange(curMode.commentEnd, to);
        cm.replaceRange(curMode.commentStart, from);
        if (from.line == to.line && from.ch == to.ch) // An empty comment inserted - put cursor inside
          cm.setCursor(from.line, from.ch + curMode.commentStart.length);
      } else { // Uncomment range
        var selText = cm.getRange(from, to);
        var startIndex = selText.indexOf(curMode.commentStart);
        var endIndex = selText.lastIndexOf(curMode.commentEnd);
        if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
          // Take string till comment start
          selText = selText.substr(0, startIndex)
          // From comment start till comment end
            + selText.substring(startIndex + curMode.commentStart.length, endIndex)
          // From comment end till string end
            + selText.substr(endIndex + curMode.commentEnd.length);
        }
        cm.replaceRange(selText, from, to);
      }
    });
  });

  // Applies automatic mode-aware indentation to the specified range
  CodeMirror.defineExtension("autoIndentRange", function (from, to) {
    var cmInstance = this;
    this.operation(function () {
      for (var i = from.line; i <= to.line; i++) {
        cmInstance.indentLine(i, "smart");
      }
    });
  });

  // Applies automatic formatting to the specified range
  CodeMirror.defineExtension("autoFormatRange", function (from, to) {
    var cm = this;
    var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
    var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
    var tabSize = cm.getOption("tabSize");

    var out = "", lines = 0, atSol = from.ch == 0;
    function newline() {
      out += "\n";
      atSol = true;
      ++lines;
    }

    for (var i = 0; i < text.length; ++i) {
      var stream = new CodeMirror.StringStream(text[i], tabSize);
      while (!stream.eol()) {
        var inner = CodeMirror.innerMode(outer, state);
        var style = outer.token(stream, state), cur = stream.current();
        stream.start = stream.pos;
        if (!atSol || /\S/.test(cur)) {
          out += cur;
          atSol = false;
        }
        if (!atSol && inner.mode.newlineAfterToken &&
            inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
          newline();
      }
      if (!stream.pos && outer.blankLine) outer.blankLine(state);
      if (!atSol && i < text.length - 1) newline();
    }

    cm.operation(function () {
      cm.replaceRange(out, from, to);
      for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
        cm.indentLine(cur, "smart");
      cm.setSelection(from, cm.getCursor(false));
    });
  });
})();

jQuery(function($) {
  var editor = CodeMirror.fromTextArea($('#code')[0], {
    lineNumbers: true,
    mode: 'text/javascript',
    theme: 'oceanic-next'
  });

  $('#format').on('click', function() {
    editorContent = editor.getValue();
    editorContent = js_beautify(editorContent, {indent_with_tabs: true});
    editor.setValue(editorContent);
    editor.refresh();
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.60.0/codemirror.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.60.0/mode/javascript/javascript.min.js" rel="stylesheet"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-beautify/1.13.5/beautify.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.60.0/codemirror.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.60.0/theme/oceanic-next.min.css" rel="stylesheet"/>
<button id="format">Format</button>
<textarea id="code">var APP_ID = "APP_ID";
(function(){var w=window;var ic=w.Intercom;if(typeof ic==="function"){ic('reattach_activator');ic('update',w.intercomSettings);}else{var d=document;var i=function(){i.c(arguments);};i.q=[];i.c=function(args){i.q.push(args);};w.Intercom=i;var l=function(){var s=d.createElement('script');s.type='text/javascript';s.async=true;s.src='https://widget.intercom.io/widget/' + APP_ID;var x=d.getElementsByTagName('script')[0];x.parentNode.insertBefore(s, x);};if(document.readyState==='complete'){l();}else if(w.attachEvent){w.attachEvent('onload',l);}else{w.addEventListener('load',l,false);}}})();
</textarea>