在网站上打印当年的最短途径 [英] Shortest way to print current year in a website

问题描述

我需要更新几百个在页脚中具有硬编码版权日期的静态HTML页面。我想用一些每年会自动更新的JavaScript替换它。

I need to update a few hundred static HTML pages that have the copyright date hard coded in the footer. I want to replace it with some JavaScript that will automatically update each year.

目前我正在使用：

<script type="text/javascript">var year = new Date();document.write(year.getFullYear());</script>

这是否足够短？

推荐答案

这是我能得到的最短的：

Here's the shortest I can get it:

<script>document.write(new Date().getFullYear())</script>

这适用于我遇到的所有浏览器。

That will work in all browsers I've run across.

我如何到达那里：

• 您只需拨打 getFullYear 直接在新创建的日期上，不需要变量。 new Date（）。getFullYear（）可能看起来有点奇怪，但它是可靠的： new Date（）部分首先完成，然后是 .getFullYear（）。


• 你可以删除类型，因为JavaScript是默认值;这甚至记录为 HTML5规范的一部分，可能在这种情况下要写出浏览器已经做过的事情。


• 你可以在最后删除分号以获得一个额外保存的字符，因为JavaScript有自动分号插入，这是一个功能我通常鄙视并反对，但在这个特定用例中它应该足够安全。

• You can just call getFullYear directly on the newly-created Date, no need for a variable. new Date().getFullYear() may look a bit odd, but it's reliable: the new Date() part is done first, then the .getFullYear().
• You can drop the type, because JavaScript is the default; this is even documented as part of the HTML5 specification, which is likely in this case to be writing up what browsers already do.
• You can drop the semicolon at the end for one extra saved character, because JavaScript has "automatic semicolon insertion," a feature I normally despise and rail against, but in this specific use case it should be safe enough.

这很重要请注意，这仅适用于启用了JavaScript的浏览器。理想情况下，这可以更好地作为一年一次的离线批处理作业（ sed 脚本* nix等）处理，但如果你想要JavaScript解决方案，我认为这是尽可能短。 （现在我走了，试探命运。）

It's important to note that this only works on browsers where JavaScript is enabled. Ideally, this would be better handled as an offline batch job (sed script on *nix, etc.) once a year, but if you want the JavaScript solution, I think that's as short as it gets. (Now I've gone and tempted fate.)

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