Tern Lint Demo /** * @type {Array.} */ var arr; arr = [10, "", 10, "", true, {}]; // here 10 and {} raises errors arr.length; Demonstrates integration of Tern and CodeMirror. The following keys are bound: Ctrl-SpaceAutocomplete Ctrl-IFind type at cursor Alt-.Jump to definition (Alt-, to jump back) Ctrl-QRename variable Documentation is sparse for now. See the top of the script for a rough API overview.