Explain this query

Ankit Shukla

11y1.3k

Hi,

Can anyone explain this query?

and why we add '1' in 3rd line (highlight with red color)?

Thanks in advance.

4 Replies

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Anubhav Chaudhary11y ago
It will give everything after last "/", and as obvious it would be your page name, so page name is fetched using this code.
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Rajeesh Menoth11y ago
Hi,
lastIndexOf() finds the last occurrence of your string in the string you're searching.So the first lastIndexOf() finds the last "/" in the href attribute of the link.+1 is needed, so that the url still contains the last "/".

Ref : http://www.trans4mind.com/personal_development/JavaScript2/lastIndexOf.htm
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Arjunan Selvam11y ago
Hi
The highlighted code is used to retrieve the page name from the given url.If you want to understand it clearly,open your chrome -> Go to "Console" and do the following steps to understand clearly.

For example - Visit the following URL for our testing & copy,paste in the console to check

http://www.w3schools.com/jsref/jsref_substr.asp

1. window.location.href
Result - "http://www.w3schools.com/"

2. window.location.href.lastIndexOf("/")
Result - 30

3. window.location.href.substr(window.location.href.lastIndexOf("/") +1);
Result - "jsref_substr.asp"

Do these in the browser as i said,You will get a clear picture.

Please mark this as answer once you feel this as right solution.
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Karthikeyan K11y ago
Hi sir

Try this
1. http://befused.com/javascript/get-filename-url
2. http://www.trans4mind.com/personal_development/JavaScript2/lastIndexOf.htm
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