JavaScript IDE Help

Getting Started

• Write JavaScript in the editor pane.
• Select Run to execute your code in the shell.
• Use Save to download your file and Load to open a saved file.
• Use Reset Example to restore the sample program.

Editor Basics

• Undo and Redo step backward and forward through edits.
• Format cleans up your code using the built-in formatter.
• Clear removes all code from the editor.
• Press Enter to start a new line. The editor carries forward the current indentation.
• Press Tab to indent and Shift+Tab to outdent.
• Use the # button to show or hide line numbers.

Find and Replace

• Press Ctrl+F to open Find.
• Press Ctrl+H to open Replace.
• Use Enter in the Find box for the next match.
• Use Shift+Enter in the Find box for the previous match.
• Use Enter in the Replace box to replace the current match.
• Use Ctrl+Alt+Enter in the Replace box to replace all matches.
• The match count appears under the Find and Replace controls.

Commenting and Indentation

• Use Ctrl+/ to toggle line comments for the current line or selected lines.
• Comments are added before the first non-space character, so indentation stays intact.
• Use Ctrl+[ to outdent selected lines.
• Use Ctrl+] to indent selected lines.

Running Code

• The shell shows console.log(), console.error(), and other console output.
• prompt() and alert() are supported.
• Use Reset in the shell to clear variables and start fresh.
• Use Clear in the shell to clear the console output only.

Keyboard Shortcuts

Tips

• Keep programs small while testing. Run often.
• If output looks strange, reset the shell and run again.
• Save your work before trying large formatting or replace-all changes.