javascript regexp replace不起作用，但字符串替换有效 [英] javascript regexp replace not working, but string replace works

问题描述

我正在使用jQuery，正在尝试编写模式替换，但是它不起作用.我有这个:

I'm working with jQuery and am trying to write a pattern replace, but it doesn't work. I have this:

var $featured_rewrite = $('#featured').not('.slideshow');
$featured_rewrite.children().attr('href', $featured_rewrite.find('img').attr('src').replace('/-[0-9]+x[0-9]+\./i', '.'));

我不明白为什么这样的事情起作用:

I don't understand why something like this works:

.replace('-500x277.', '.')

但是不是，我什至用工具检查了一下并确保它是有效的并且可以工作:

but not this, which I even checked with a tool and made sure it was valid and works:

.replace('/-[0-9]+x[0-9]+\./i', '.')

推荐答案

'/-[0-9] + x [0-9] + \ ./i'是字符串.

/-[0-9] + x [0-9] + \ ./i 是正则表达式.

"hi".match('/hi/')  // returns null
"hi".match(/hi/)    // returns ["hi"]

另外，请注意，除了引号外，您的正则表达式没有其他问题.如果您需要替换多个匹配项，则可能要考虑使用/g (即末尾的/gi )，仅此而已.

Also, just to be clear, there's nothing wrong with your regex other than the quotes. You may want to consider using /g (i.e. /gi at the end) if you need to replace more than one match, but that's it.

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