What are the methods for traversing nodes in jquery?

JQ methods for traversing nodes: 1. children(); 2. next(); 3. prev(); 4. siblings(); 5. find(); 6. eq(); 7. first(); 8. last(); 9. filter(); 10. is(); 11. map() and so on.

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

jquery method of traversing nodes

1. children() method: $('p').children()---Traverse to find all child element nodes of p element

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2. next() method: $('p').next() --- Find p element Next adjacent sibling elements but not all sibling elements

　[Related methods]

　(1)nextAll() method: $('p').nextAll() --- - Find all sibling elements after p

　(2)nextUntil() method: $('p').nextUntil('p')----Find all sibling elements after p up to p Element

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    And Again

3, prev() method: $('p').prev() ---- Find the adjacent sibling elements before p

[Related methods are]

　(1)prevAll() method: $('p').prevAll() ---- Find all sibling elements before p

　(2) prevUntil() method: $('p').prevUntil('p') --- Find all elements before p until p element

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    Hello Again

And Again

4, siblings() method: $('p') .siblings()---- Find all sibling elements before and after p

5. find() method: $('p').find('span') ---- Find the children within p element The element is also a span element

6. eq() method: $('p').eq(1) --- Find the second p element (index subscript starts from 0)

7. first() method: $('li').first() --- Get the first li element

8. last() method: $('li').last( ) --- Get the last li element

9, filter() method: $('p').filter('.box') --- Get the p element with the class name box

10. is() method: $('.box').is('p') ---- Determine whether .box is a p element

11. map() method: $( 'p').map(callback) --- Execute the callback function for each p

Example: Traverse the input element to obtain its value and add it to the back of the p element separated by ","

Values: 

  
  
  

12. hasClass() method: $('p').hasClass('box') ---- Find p

#13. has() method: $(' p').has('span') ---- Find p elements that contain span elements

14. not() method: $('p').not('span') - --- Find p elements that do not contain span elements

15. slice() method: $('p').slice(0,2) ---- Find the 1st p element to the 1st p element 3 p elements

16, offsetParent() method: $('p').offsetParent() --- Find the first positioned ancestor element of the p element

17, parent() method: $('p').parent() ---- Returns the element set containing the unique parent node of the p element

18, parents() method: $('p'). parent() ---- Returns all ancestor nodes containing the p element (excluding the root node)

19. parentUntil() method: $('p').parentUntil('#box') -- -- Find the ancestor elements of the p element until #box

20. contents() method: $('p').contents() --- Return all child nodes within the p element (including text Node)

21. end() method: $('p').find('span').end() ---- Change the body of the statement back to the previous state, that is: find span After the element, the focus returns to the p element

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Related video tutorial recommendations: jQuery Tutorial (Video)

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