Javascript 通过JS自动执行功能在头部创建文本节点时出现问题

这是我第一次使用自动执行的匿名函数，但是，我相信我遗漏了一些基本的、摆在我面前的东西。本质上，我试图通过函数“writeFontFace”传递一个参数，并让它在我的文档头中编写以下代码，如下所示：

@font-face {
    font-family: 'arrows';
    src: url('fonts/arrows/arrows.eot?');
    src: url('fonts/arrows/arrows.eot?#iefix') format('embedded-opentype'),
         url('fonts/arrows/arrows.woff?') format('woff'),
         url('fonts/arrows/arrows.ttf?') format('truetype'),
         url('fonts/arrows/arrows.svg?#arrows') format('svg');
    font-weight: normal;
    font-style: normal;
}

现在，如果我在函数writeFontFace结尾处取消对“return”语句的注释，我确实会收到我希望收到的相应输出，但是无论出于何种原因，它都不会在我的文档头中附加包含上述@font-face定义的“script”变量？我不太明白为什么。如有任何建议和/或意见，我们将不胜感激。。。再说一次，这是我第一次使用自动执行匿名函数，因此，如果有人觉得他们可能会有一些建设性的批评和/或建议，我希望能少一些讽刺。和往常一样，我们需要提前感谢你

~z~干杯

自动执行匿名函数

(function() {

     /**
      * Object Literal           {Property Values}           Constant: property values to be used throughout this object
      */
      const vars = {
           decCharPrefix : '&#',
           decCharSuffix : ';',
           baseGlyphValue: 59392,
         }
     };

     /**
      * bpIconFont               {Constructor}               Core: constructor for this library; ensures that this library is instantiated if an internal method is called
      */
     var bpIconFont = function() {
         if(!(this instanceof bpIconFont))
             return new bpIconFont();
     };

     /**
      * bpIconFont.fn
      */
     bpIconFont.fn = bpIconFont.prototype = {
         init: function() {
             console.log('bpIconFont Initialized!');
         }
     }

     window.bpIconFont = bpIconFont;                         // Expose: anonymous self-executing function to DOM

})();

/**
 * getFontDirectroy         {Method}                    Gets: generates the directory to which the passed font will be placed, via relative path
 * @param                   {Array/String} font         Converts: the passed array or string and generates a 'relative path' for the desired font
 * @return                  {Array/String}              Returns: the relative path for the font
 */
bpIconFont.fn.getFontDirectroy = function(font) {
    var fontDir = 'fonts/' + font + '/';
    return fontDir;
};

/**
 * getFontDirectroy         {Method}                    Gets: generates the directory to which the passed font will be placed, via relative path
 * @param                   {Array/String} font         Converts: the passed array or string and generates a 'relative path' for the desired font
 * @return                  {Array/String}              Returns: the relative path for the font
 */
bpIconFont.fn.writeFontFace = function(font) {
    var dir    = bpIconFont().getFontDirectroy(font);
    var head   = document.getElementsByTagName("head")[0];
    var script = document.createElement('style');
        script.setAttribute('type', 'text/css');

    var fontFace = '@font-face {' +
                  '\n\tfont-family: \'' + font +
                '\';\n\tsrc: url(\'' + dir + font + '.eot?\');' +
                   '\n\tsrc: url(\'' + dir + font + '.eot?#iefix\') format(\'embedded-opentype\'),' +
                     '\n\t\t url(\'' + dir + font + '.woff?\') format(\'woff\'),' +
                     '\n\t\t url(\'' + dir + font + '.ttf?\') format(\'truetype\'),' +
                     '\n\t\t url(\'' + dir + font + '.svg?#' + font + '\') format(\'svg\');' +
                   '\n\tfont-weight: normal;' +
                   '\n\tfont-style: normal;' +
                '\n}';

    script.appendChild(document.createTextNode(fontFace));

    head.appendChild(script);

    // return fontFace;
};

---

基本上，如果其他人遇到类似问题，下面的代码应该为您提供相应的修复：

(function() {

     /**
      * bpIconFont               {Constructor}               Core: constructor for this library; ensures that this library is instantiated if an internal method is called
      */
     var bpIconFont = function() {
         if(!(this instanceof bpIconFont))
         return new bpIconFont();
     };

     /**
      * bpIconFont.fn
      */
     bpIconFont.fn = bpIconFont.prototype = {
         init: function() {
             console.log('bpIconFont Initialized!');
         }
     }

     window.bpIconFont = bpIconFont;                         // Expose: anonymous self-executing function to DOM

})();

     /**
      * Object Literal           {Property Values}           Constant: property values to be used throughout this object
      */
    vars = {
        decCharPrefix : '&#',
        decCharSuffix : ';',
        baseGlyphValue: 59392,
    };

/**
 * getFontDirectroy         {Method}                    Gets: generates the directory to which the passed font will be placed, via relative path
 * @param                   {Array/String} font         Converts: the passed array or string and generates a 'relative path' for the desired font
 * @return                  {Array/String}              Returns: the relative path for the font
 */
bpIconFont.fn.getFontDirectroy = function(font) {
    var fontDir = 'fonts/' + font + '/';
    return fontDir;
};

/**
 * getFontDirectroy         {Method}                    Gets: generates the directory to which the passed font will be placed, via relative path
 * @param                   {Array/String} font         Converts: the passed array or string and generates a 'relative path' for the desired font
 * @return                  {Array/String}              Returns: the relative path for the font
 */
bpIconFont.fn.writeFontFace = function(font) {
    var dir    = bpIconFont().getFontDirectroy(font);
    var head   = document.getElementsByTagName("head")[0];
    var script = document.createElement('style');
        script.setAttribute('type', 'text/css');

    var cssDef = '\ndiv#output-window {' +
                 '\n\tfont-family:\'' + font + '\';' +
                 '\n}';

    var fontFace = '@font-face {' +
                  '\n\tfont-family: \'' + font +
                '\';\n\tsrc: url(\'' + dir + font + '.eot?\');' +
                   '\n\tsrc: url(\'' + dir + font + '.eot?#iefix\') format(\'embedded-opentype\'),' +
                     '\n\t\t url(\'' + dir + font + '.woff?\') format(\'woff\'),' +
                     '\n\t\t url(\'' + dir + font + '.ttf?\') format(\'truetype\'),' +
                     '\n\t\t url(\'' + dir + font + '.svg?#' + font + '\') format(\'svg\');' +
                   '\n\tfont-weight: normal;' +
                   '\n\tfont-style: normal;' +
                '\n}';

    script.appendChild(document.createTextNode(fontFace));
    script.appendChild(document.createTextNode(cssDef));
    head.appendChild(script);

};