使用Java脚本替换部分元数据内容网址

Question

Here is my raw HTML:

<meta name='twitter:image' expr:content='data:blog.postImageThumbnailUrl'/>

And here is the result on the page

<meta name="twitter:image" content="http://1.bp.blogspot.com/-DmLY0uHInEw/Ut45x9vmxAI/AAAAAAAADlw/4O6366ds6G0/s72-c/End_of_the_World_as_we_know_it.png">

Here is my javascript (which I'm sure is full of mistakes)

$('meta').each(function () {
var href = $(this).attr('content').replace("s72-c", "s1600");
});

What I want to do: I need to replace s72-c in my metadata content url with s1600 .

I've tried everything, but it's not working and I'm not very good with jquery :/ Can someone please help me out?

Answer 1

You've forgotten to actually set the new content attribute. Try this:

$(function() {
    $('meta').each(function () {
        var $this = $(this),
            href = $this.attr('content').replace("s72-c", "s1600");

        // now set it 
        $this.attr('content', href); 
    });
});

Answer 2

您可以使用一行代码来实现此目的，而无需每个函数：

$("meta").attr("content", function(){return $(this).attr("content").replace("s72-c", "s1600")});