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Console

For debugging. All console.log output shows up in the "Console" panel at the bottom of the editor.

Basics​

console.log("hello")
console.log("count:", 42)
console.log({ a: 1, b: [1, 2, 3] })  // objects/arrays are auto-stringified to JSON

Multiple Arguments​

Multiple arguments are supported and joined by spaces:

console.log("name:", name, "age:", age)
// name: Alice age: 18

Error Logs​

console.error("something went wrong")
console.error(err)

Works the same as console.log, but the log line gets an [error] prefix so you can filter on it.

Pairing with try / catch​

It's a good habit to wrap async APIs:

try {
  const data = await new Request(url).fetchJSON()
  this.value = data.value
} catch (e) {
  console.error("data fetch failed:", e)
  this.value = "--"
}

Debugging Tips​

  • The console only shows output when running in the editor. There's no console when the widget runs on the home screen.
  • To see exactly what a variable holds, just console.log(JSON.stringify(obj, null, 2)).
  • Troubleshooting a placeholder that won't show? First console.log to check if it's undefined.
  • The global isDebug() function returns whether you're currently debugging in the editor — useful as a "only log when debugging" switch.
if (isDebug()) {
  console.log("debug info:", obj)
}