Question

我遇到了问题：变量output不会改变应有的方式。在while循环中记录它时，正在编辑的它显示正常。但是当在循环之外再次记录它时，变化从未发生过。

这是我的代码：

(function() {
  var foot, fs, head, inputFile, output, outputFile;

  fs = require('fs');

  head = "var setStyles = function(){";

  foot = "}";

  inputFile = "css/index.css";

  outputFile = "compiled/index.js";

  output = head;

  fs.readFile(inputFile, 'utf8', function(err, data) {
    var css, identifier, match, prop, regex, results, selector, styleMatch, styleRegex, styles, tag, val;
    if (err) {
      console.log(err);
    }
    css = data;
    regex = /(\.|#)?([a-zA-Z-_0-9]+)\n*{([\s\S]+?)}/;
    results = [];
    while (match = css.match(regex)) {
      identifier = match[1];
      tag = match[2];
      styles = match[3];
      if (identifier === ".") {
        selector = "document.getElementsByClassName(" + tag + ");";
      } else if (identifier === "#") {
        selector = "document.getElementById(" + tag + ")";
      } else {
        selector = "document.getElementsByTagName(" + tag + ")";
      }
      output = "";
      styleRegex = /([a-zA-Z-_]+?):\s*(["'#-_a-zA-Z0-9]+?)\s*;/;
      while (styleMatch = styles.match(styleRegex)) {
        prop = styleMatch[1];
        val = styleMatch[2];
        styles = styles.replace(styleMatch[0], "");
      }
      results.push(css = css.replace(match[0], ""));
    }
    return results;
  });

  console.log(output);

  output += "\n" + foot;

  fs.writeFile(outputFile, output, function(err) {
    if (err) {
      return console.log(err);
    }
  });

}).call(this);

有谁能告诉我这里我做错了什么？

提前致谢，约迪

变量未正确设置

0 个答案: