我尝试了用户76888布局的技术并且运行良好。为方便起见，我将它打包成jQuery插件，并认为社区可能喜欢它，所以在这里：

I tried the technique that user76888 laid out and it worked nicely. I packaged it into a jQuery plugin for convenience, and thought the community might enjoy it, so here:

jQuery.fn.cleanWhitespace = function() {
    this.contents().filter(
        function() { return (this.nodeType == 3 && !/\S/.test(this.nodeValue)); })
        .remove();
    return this;
}

要使用它，只需将其包含在脚本标记中，然后选择一个标记用jQuery清理并像这样调用函数：

To use this, just include it in a script tag, then select a tag to clean with jQuery and call the function like so:

$('#widget').cleanWhitespace();