Modifies the value of an existing HTML element. The desired element to be modified is located by using CSS selector syntax. The incoming HTML is first converted into a HTML Document Object Model so that HTML elements may be selected in the similar manner that CSS selectors are used to apply styles to HTML. The resulting HTML DOM is then “queried” using the user defined CSS selector string to find the element the user desires to modify. If the HTML element is found the element’s value is updated in the DOM using the value specified “Modified Value” property. All DOM elements that match the CSS selector will be updated. Once all of the DOM elements have been updated the DOM is rendered to HTML and the result replaces the flowfile content with the updated HTML. A more thorough reference for the CSS selector syntax can be found at “”


modify, html, dom, css, element


In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the Expression Language Guide.

Name Default Value Allowable Values Description
URL Base URL for the HTML page being parsed.
CSS Selector CSS selector syntax string used to extract the desired HTML element(s).
Supports Expression Language: true
HTML Character Encoding UTF-8 Character encoding of the input HTML
Output Type HTML * HTML</br> * Text</br> * Attribute</br> Controls whether the HTML element is output as HTML,Text or Data
Modified Value Value to update the found HTML elements with
Supports Expression Language: true
Attribute Name When modifying the value of an element attribute this value is used as the key to determine which attribute on the selected element will be modified with the new value.
Supports Expression Language: true


Name Description
element not found Element could not be found in the HTML document. The original HTML input will remain in the flowfile content unchanged. Relationship 'original' will not be invoked in this scenario.
original The original HTML input
invalid html The input HTML syntax is invalid
success Successfully parsed HTML element

Reads Attributes:

None specified.

Writes Attributes:

Name Description
NumElementsModified Total number of HTML element modifications made

See Also: