tooltipRef property
The element at which this tooltip is targeted.
This is typically set in the template by using a var ref. For example:
<span tooltipTarget #target="tooltipTarget">Tip</span>
<material-tooltip-text [for]="target">My tooltip</material-tooltip-text>
Implementation
@Input('for')
set tooltipRef(TooltipTarget? target) {
if (target == null) return;
_tooltipSource = target;
target.setTooltip(tooltipHandle);
}