Oxygen XML Editor allows you to create and edit JavaScript files and assists you with useful features such as syntax highlight, content completion, and outline view. To enhance your editing experience, you can select entire blocks (parts of text delimited by brackets) by double-clicking somewhere inside the brackets.
Figure: JavaScript Editor Text Mode
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comment
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comment
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Fold
Collapse Other Folds (Ctrl (Meta on Mac OS)+NumPad
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Collapse Child Folds (Ctrl (Meta on Mac OS)+NumPad
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(Ctrl (Meta on Mac OS)+NumPad *)