Javascript格式化并高亮xml字符串的方法及注意事项

/**
 * 格式化xml
 * @param content
 * @returns {*}
 */
this.parse_xml = function(content) {
  let xml_doc = null;
  try {
    xml_doc = (new DOMParser()).parseFromString(content.replace(/[\n\r]/g, ""), 'text/xml');
  } catch (e) {
    return false;
  }

  function build_xml(index, list, element) {
    let t = [];
    for (let i = 0; i '+ element.nodeName +'>\n');
    for (let i = 0; i ' + value + '';
        let item = t + '    <' + nodeName +
          '>' + value_txt + '' + nodeName + '>\n';
        list.push(item);
      } else {
        build_xml(++index, list, element.childNodes[i]);
      }
    }
    list.push(t + ''+ element.nodeName +'>\n');
  }
  let list = [];
  build_xml(0, list, xml_doc.documentElement);
  return list.join("");
};

.code-string{color:#993300;}
.code-number{color:#cc00cc;}
.code-boolean{color:#000033;}
.code-null{color:magenta;}
.code-key{color:#003377;font-weight:bold;}