in src/panel/widgets.tsx [230:249]
render() {
const {horizontal} = this.props;
const style: CSSProperties = horizontal
? {
position: 'absolute', zIndex: 1,
cursor: 'col-resize',
right: -10, width: 20,
top: 0, bottom: 0
}
: {
position: 'absolute', zIndex: 1,
cursor: 'row-resize',
bottom: -10, height: 20,
left: 0, right: 0
};
return <div onMouseDown={this.onMouseDown} style={style}
onClick={e => e.stopPropagation() /* Prevent click in situations such as triggering a table header cell sort. */}
></div>;
}