i already checked the documentation but it is not in there. A simple code and solution to my problem will be a great help. The goal is to add tooltip in each device label. Click this link. Device Scatter Chart
Update 05/16/19
One solution is to create SVGTitleElement and append it to the SVGText element.
addTooltip(){
var texts = document.getElementsByTagName("text");
for(var index = 0; index < texts.length; index++){
var innerTag = texts.item(index);
if(this.vAxisLabels.indexOf(innerTag.innerHTML) >= 0){
var newTitle = document.createElementNS("http://www.w3.org/2000/svg", "title");
newTitle.innerHTML = innerTag.innerHTML;
innerTag.appendChild(newTitle);
}
}
}
Other useful link: https://stackoverflow.com/a/42745584/10214587