Javascript – console.log timestamps in Chrome

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Is there any quick way of getting Chrome to output timestamps in console.log writes (like Firefox does). Or is prepending new Date().getTime() the only option?

Best Answer

In Chrome, there is the option in Console Settings (Either press F1 or select Developer Tools -> Console -> Settings [upper-right corner] ) named "Show timestamps" which is exactly what I needed.

I've just found it. No other dirty hacks needed that destroys placeholders and erases place in the code where the messages was logged from.

Update for Chrome 68+

The "Show timestamps" setting has been moved to the Preferences pane of the "DevTools settings", found in the upper-right corner of the DevTools drawer:

Related Solutions

Javascript – Detecting an “invalid date” Date instance in JavaScript

Here's how I would do it:

if (Object.prototype.toString.call(d) === "[object Date]") {
  // it is a date
  if (isNaN(d.getTime())) {  // d.valueOf() could also work
    // date is not valid
  } else {
    // date is valid
  }
} else {
  // not a date
}

Update [2018-05-31]: If you are not concerned with Date objects from other JS contexts (external windows, frames, or iframes), this simpler form may be preferred:

function isValidDate(d) {
  return d instanceof Date && !isNaN(d);
}

Javascript – Storing Objects in HTML5 localStorage

Looking at the Apple, Mozilla and Mozilla again documentation, the functionality seems to be limited to handle only string key/value pairs.

A workaround can be to stringify your object before storing it, and later parse it when you retrieve it:

var testObject = { 'one': 1, 'two': 2, 'three': 3 };

// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));

// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');

console.log('retrievedObject: ', JSON.parse(retrievedObject));

Best Answer

Update for Chrome 68+

Related Solutions

Javascript – Detecting an “invalid date” Date instance in JavaScript

Javascript – Storing Objects in HTML5 localStorage

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