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recently i have seen following error in jsfiddle document.write is disallowed in JSFiddle envioriment and might break your fiddle. Why JSfiddle has banned document.write? What are the major side effects of using this? and what are the best alternatives of this?

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    `document.write` can have problems with race conditions and, if the document is finished being written, will trigger `document.open` - clearing the whole page of all _HTML_. Alternatives? Use _DOM methods_ such as `appendChild`. – Paul S. Feb 02 '14 at 23:15
  • So if added the document.write("something") in my code, it will auto trigger the document.open and my whole code will be erased? –  Feb 02 '14 at 23:18
  • You may find it helpful to read the MDN page on this method https://developer.mozilla.org/en-US/docs/Web/API/document.write – Paul S. Feb 02 '14 at 23:24

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