CHANGELOG.md

3.1.5

Fixes

Prevent breakage in older browsers that do not support 'navigation' entry type

3.1.4

Fixes

Return an empty object when 'paint' entries are not supported

3.1.3

Fixes

Fix failure to execute 'observe' on 'PerformanceObserver' and entryType in not accepted by browser.

3.1.1

Fixes

Add some backwards compatibility for older browsers

3.1.0

Feature

Add redirect_count to navigation metrics

3.0.1

Fixes

Null check for requestAnimationFrame

Escape execution for "fps" after requestAnimationFrame null check has failed

3.0.0

Breaking changes

Move to async interface

All functions have transformed to async functions.

By utilising PerformanceObserver, async interface allows to decouple from waiting for onload event. User can include an async file and not worry about loading time.

Here are migration examples:

Before

const metrics = navigation();

After

const metrics = await navigation();

Before

send(all());

After

No need to wait for window load

all().then(send).catch(console.error);

Before

const metrics = { ...paint(), ...navigation() };

After

const metrics = Object.assign.apply(null, await Promise.all([ paint(), navigation() ]));

2.2.1

Fixes

Verify page_time_elapsed

Should not send null value. The rest of the library sends undefined when no value is available so it gets dropped in JSON stringification.

2.2.0

New features

Add navigation metrics

• duration: Difference between responseEnd and startTime
• worker_start: Time until service worker ran

Add connection type

• navigation_type: navigate, reload, back_forward, prerender

2.1.1

Fixes

Verify numbers are safe

Use max safe integer if result is higher

2.1.0

New features

Add time elapsed

Time elapsed allows us to have a relative point of comparison between the different measuring.

• page_time_elapsed: milliseconds elapsed since the time origin

2.0.1

Fixes

Support for internet explorer Number functions (fallback from Number object to global functions)

2.0.0

Breaking changes

New interface

Completely new interface. Instead of a callback, expose functions that return structured data. It's different