Not TestedTesting not done, may not work properly

Resize Observer

Observe changes to an Element's content or border box dimensions.

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Interactive Input Workspace

Input Text / Data Payload:

Ready for input

Web API Execution Output

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Native JavaScript Code Example (Zero Libraries)

const observer = new ResizeObserver(entries => {
  for (let entry of entries) console.log(entry.contentRect.width);
});
observer.observe(document.body);

About the Resize Observer Web API

ResizeObserver reports changes to the dimensions of an Element's content box or border box.

Specification:W3C & WHATWG Web API Standard