How to add line breaks within tooltip in angular material design

Question

How to add line break in tooltip I have implemented the Tooltip but i am not able to add multi line or line breaks in tooltip.Below is my code

http://codepen.io/apps4any/pen/RWQLyr

Html

<div ng-controller="AppCtrl" ng-cloak="" class="tooltipdemoBasicUsage" ng-app="MyApp">
  <md-content layout-padding="">
    <md-button class="md-fab md-fab-top-right right" aria-label="Photos">
      <md-icon md-svg-src="img/icons/ic_photo_24px.svg" style="width: 24px; height: 24px;"></md-icon>
      <md-tooltip>
        List1<br>
        List2<br>
        List3<br>
        List4
      </md-tooltip>
    </md-button>
    <div style="margin-top: 150px;">
    </div>
  </md-content>
</div>

CSS:

.tooltipdemoBasicUsage md-toolbar .md-toolbar-tools .md-button, .tooltipdemoBasicUsage md-toolbar .md-toolbar-tools .md-button:hover {
  box-shadow: none;
  border: none;
  transform: none;
  -webkit-transform: none; }
.tooltipdemoBasicUsage .left {
  top: 70px !important;
  left: 56px !important; }
.tooltipdemoBasicUsage .right {
  top: 70px !important;
  right: 56px !important; }

JS

angular.module('MyApp')
.controller('AppCtrl', function($scope) {
  $scope.demo = {};
});

Answer 1

Adding this CSS seems to work in your case (with the <br>s):

md-tooltip .md-content {
    height: auto;
}

I'm not sure why Angular-Material hard-coded the height to 22px. You'll need to check whether this change breaks other tooltips.

Or you can apply it specifically to this use case only by giving it a class, e.g. tt-multiline, so you can target it in CSS:

md-tooltip.tt-multiline .md-content {
    height: auto;
}

---

Edit: Starting from Angular-Material 1.1, some class names have changed to start with a underscore.

In this case use

md-tooltip ._md-content {
    height: auto;
}

and for specific class

md-tooltip.tt-multiline ._md-content {
    height: auto;
}