Thursday 16 February 2023

javascript to find any element in an XML document that contains the text content 'Hello'

 How we can use javascript to find any element in an XML  document that contains the text content 'Hello';



with this example first we have to create xml document into a variable like this 

const parser=new DOMParser();

const xmlDoc=parser.parseFromString(text, 'text/xml')

// Get all elements in the XML document
const elements = xmlDoc.getElementsByTagName('*');

// Iterate over the elements and find any that contain text content "Hello"
for (let i = 0; i < elements.length; i++) {
  const element = elements[i];
  if (element.textContent === 'Hello') {
    console.log(`Found matching element with tag name "${element.tagName}"`);
  }
}


Above javascript code first retrieve all elements in XML document using the 'getElementsByTagName'
 method. It then iterates over the elements and check the each element's `textContent ` property to see if it matches the string 'Hello'. If it does, the code prints the tag name of the matching elements to console.

this code should work with any valid XML document.


Example of raw XML document: 


<?xml version="1.0" encoding="UTF-8"?>
<root>
  <greeting>Hello</greeting>
  <message>How are you?</message>
</root>

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