这个jQuery语法在做什么？

Question

$(".topLevelCategoryContainer img").width($(this).parent().parent().width()).css({ "text-align": "center", "border": "none", "margin-left": "0" });

我不理解.width和.parent（）。 感谢。

Answer 1

// this gets images within the .topLevelCategoryContainer element
$(".topLevelCategoryContainer img")
    // this sets the width of the image
    .width(
        // this gets the value to set the width to, in this case
        // to the same width as the images parents parent
        $(this).parent().parent().width()
    )
    //this sets CSS on the image
    .css({ 
       "text-align": "center", 
       "border": "none", 
       "margin-left": "0" 
    });