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In file download dialog, I just want to give option to view the file. So is there any possibility to disable or hide the "SAVE" option through jquery. Currently I am loading the file download dialog to "iframe".
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The dialog is provided by your browser, so you cannot alter it from your codebase.
If you have a file which can be viewed inside a browser (like txt or pdf), you could advice the browser in a link to open it instead of downloading it.
Via javascript you can try to open the file directly omitting the dialog alltogether. See this question for an example