CSR: how to default value render

Question

Tell me how to set the default display of an element? Didn't find any good example anywhere on how to return the style and value of a list item to its default?

(function () { 
    var linkFilenameFiledContext = {}; 
    linkFilenameFiledContext.Templates = {}; 
    linkFilenameFiledContext.Templates.Fields = { 
        "LinkFilename": { "View": linkFilenameFiledTemplate } 
    };
    SPClientTemplates.TemplateManager.RegisterTemplateOverrides(linkFilenameFiledContext); 
})(); 

function linkFilenameFiledTemplate(ctx) {
    var fileRef = ctx.CurrentItem.FileRef;
    var encoded = encodeURIComponent(fileRef);
    var url = "http://sp-test/sites/test";
    var FileLeafRef = ctx.CurrentItem.FileLeafRef;
    var type = ctx.CurrentItem.File_x0020_Type;
    var LinkFilename = ctx.LinkFilename;
    var Project = ctx.CurrentItem.Project;
    if(Project == "Active" && ctx.CurrentItem.File_x0020_Type == ""){
      return "<b><span><a href=" + url + encoded + ">" + FileLeafRef + "</a></span></b>";
    } else {
      return //value and item style default?????
    }
}

Answer 1

You could add value and style directly like，just like writing html:

<b><span style='add css you want'><a href=" + url + encoded + ">" + FileLeafRef + "</a></span></b>

List View CSR introduction: Client Side Rendering: List Views

Updated:
You could try to get it in ctx.ListData.Row.