Lesson plan

JSONP

JSONP, or JSON-P (JSON with Padding), is a JavaScript technique for requesting data via the HTML element. It was proposed by Bob Ippolito in 2005. JSONP enables sharing of data bypassing same-origin policy, which disallows running JavaScript code to read media DOM elements or XMLHttpRequest data fetched from outside the page's originating site. The originating site is indicated by a combination of URI scheme, hostname, and port number. JSONP requests are vulnerable to the data source replying with malicious code, which is why it has been replaced by CORS (cross-origin resource sharing, available since 2009 ) in modern applications.

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Article summary

JSONP, or JSON-P (JSON with Padding), is a JavaScript technique for requesting data via the HTML element. It was proposed by Bob Ippolito in 2005. JSONP enables sharing of data bypassing same-origin policy, which disallows running JavaScript code to read media DOM elements or XMLHttpRequest data fetched from outside the page's originating site. The originating site is indicated by a combination of URI scheme, hostname, and port number. JSONP requests are vulnerable to the data source replying with malicious code, which is why it has been replaced by CORS (cross-origin resource sharing, available since 2009 ) in modern applications.

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Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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Key claims and bibliography are generated from the same tracked claims and sources as the article page.