preact/src/constants.js

// render modes

export const NO_RENDER = 0;
export const SYNC_RENDER = 1;
export const FORCE_RENDER = 2;
export const ASYNC_RENDER = 3;

export const EMPTY = {};

export const ATTR_KEY = typeof Symbol!=='undefined' ? Symbol.for('preactattr') : '__preactattr_';

// DOM properties that should NOT have "px" added when numeric
export const NON_DIMENSION_PROPS = {
	boxFlex:1, boxFlexGroup:1, columnCount:1, fillOpacity:1, flex:1, flexGrow:1,
	flexPositive:1, flexShrink:1, flexNegative:1, fontWeight:1, lineClamp:1, lineHeight:1,
	opacity:1, order:1, orphans:1, strokeOpacity:1, widows:1, zIndex:1, zoom:1
};

// DOM event types that do not bubble and should be attached via useCapture
export const NON_BUBBLING_EVENTS = { blur:1, error:1, focus:1, load:1, resize:1, scroll:1 };