使用Javascript查找替换URL的短部分

Question

Assume I have the following URL stored in variable called content :

http://www.example.com/watch?v=4444444&feature=related

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Problem:

1. I need to replace watch?v= with embed/
2. I need to erase whatever comes after &

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The final output would look like:

http://www.example.com/embed/4444444

I tried these two steps but didn't work:

content = content.replace('/watch?v=/', 'embed/');
content = content.replace('&*/g','');

The URL in page source code appears as:

http://www.example.com/watch?v=4444444&feature=related

Answer 1

You have many errors:

• You are using a regular expression when you only need a string.
• You are writing your regular expressions as strings.
• To write 'match any characters' you need to write '.*' , not just '*' . The star modifies the previous token.
• There is no need to use the g flag here.

Try this instead:

 content = content.replace('watch?v=', 'embed/').replace(/&.*/, '');