v4.0.0

Reduce clientBoundingRect calls

• Window bounds now only updates on scroll or resize event. Only if we have passive listeners to detect any user interaction.
• Passive listeners are now only needed where the callback can preventDefault()
• Window bounds are now cached (not the entire boundingRect object)
• Improved heuristics to avoid polling when we believe the system is stable

Support scrolling divs

• New API Method - Allow manual declaration of custom root element

Tests

• Unit tests have been migrated from Phantom to Headless Chrome
• Leaky tests have been address and tests now exit upon complete

Perf

• Address issues with excessive CPU usage and layout thrash
• Address issues with legacy MS browsers and getBoundingClientRect
• New API Method - isDirty and invalidate for State Changes

Maintenance

• Upgrade of all dependencies

Future Release Deprecations

• Note: This is the last major release of Spaniel. Going forward Spaniel will have a hard dependency on Ember. Thus Ember-Spaniel will be the new home for All Spaniel Internals.