Open Notepad. To do so, click on "Start," then select "All Programs" and click on "Accesories." Then click on the "Notepad" shortcut.
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Type or copy-and-paste your script in the text editor.
Save the file by pressing the "CTRL" and "S" keys at the same time on your keyboard. Then, in the "File name" field, type the name you want to give to your file, followed by a ".jsx" extension. Click on "Save" to finish saving your JSX file.