How to get xpath in epubjs ?

[rakshithpanjady]

No description provided.

[rakshithpanjady]

Can anyone help me on this ?

[rakshithpanjady]

Can anyone help me on this ?

[rakshithpanjady]

I need a help on this , Please anyone guide me on this ?

[johnfactotum]

Step 1. Use Document.evaluate() to get the nodes (you can get the Document object from contents.document, either in the content hook or by calling rendition.getContents()).

Step 2. Construct a Range and use cfiFromRange() (or use cfiFromElement() if your target node is an Element) to get a CFI.

Step 3. Use rendition.display() to display the CFI.

[rakshithpanjady]

Is there any method to generate xpath ?

[johnfactotum]

Short answer: Don't. Use CFI instead.

Long answer: Firstly, generating XPaths has nothing to do with Epub.js. Second, XPath isn't designed to be used as an identifier. If you want identifiers, you should use CFI. Finally, if you still want to use XPath for whatever reason, there are virtually an infinite number of ways to get XPaths of any given node, depending on what you want to do. The most common approach is:

1. Get the name of the element node. This is what goes after /.
2. Enumerate all previous sibling elements and count the number of elements with the same name (including the element itself). This is what you'd put between [ and ].
3. Repeat from step 1 with the parent element until you reach the document element, and concatenate the results.

[rakshithpanjady]

Can you tell me stepToXpath(steps) , what does step means here and how to generate it ?

[johnfactotum]

I don't know anything about "stepToXpath(steps)". Where does this function even come from?

In general, a step in XPath just means an expression that moves you towards the desired result. In practice you can just think of it as everything that comes after a /.

[panjadyboy]

![IMG20230922112134.jpg](https://github.com/futurepress/epub.js/assets/115630669/60c07ecf-5859-45ab-b264-06dc452af9c3
In epubjs there is a method named as stepToXpath(steps) , it is taking steps as parameter

[johnfactotum]

It's "stepsToXpath", not "stepToXpath". Steps here means the parsed CFI steps, an array of objects in the form { type, index, id }, where type is either "element" or "text" (see he parseStep method).