如果你使用jquery-ui 1.11.4:

var tooltip = $.widget( "ui.tooltip", {
    version: "1.11.4",
    options: {
        content: function() {
            // support: IE<9, Opera in jQuery <1.7
            // .text() can't accept undefined, so coerce to a string
            var title = $( this ).attr( "title" ) || "";
            // Escape title, since we're going from an attribute to raw HTML
Replace-->  //return $( "<a>" ).text( title ).html();
by -->      return $( "<a>" ).html( title );
             },

只需添加data-html="true"

<a href="#" title="Some long text <br/> Second line text \n Third line text" data-html="true">Hover me</a>

javascript版本

因为& # 013;(html)是0D(十六进制)，这可以表示为'\u000d'

str = str.replace(/\n/g, '\u000d');

此外,

与大家分享一个AngularJS过滤器，它将\n替换为该字符，这要感谢其他答案中的引用

app.filter('titleLineBreaker', function () {
    return function (str) {
        if (!str) {
            return str;
        }

        return str.replace(/\n/g, '\u000d');
    };
});

使用

<div title="{{ message | titleLineBreaker }}"> </div>

嗨，这段代码将在所有浏览器中工作!!我使用 用于chrome和safari的新产品线和IE的ul li

 function genarateMultiLIneCode(){
        var =values["a","b","c"];
        const liStart = '<li>';
              const liEnd = '</li>';
              const bullet = '&#8226; ';     
              var mergedString = ' ';
              const unOrderListStart='<ul>'
              const unOrderListEnd='</ul>'
              const fakeNewline = '&#013;&#010;';
              for (let i = 0; i < values.length; i++) {
                   mergedString += liStart + bullet + values[i] + liEnd + fakeNewline;
              }
              const tempElement = document.createElement("div");
              tempElement.innerHTML = unOrderListStart + mergedString + unOrderListEnd;    
              return tempElement.innerText;
            }
        }

AngularJS with Bootstrap UI Tolltip (uib-tooltip), has three versions of tool-tip:

Uib-tooltip, Uib-tooltip -template和Uib-tooltip -html

- uib-tooltip takes only text and will escape any HTML provided
- uib-tooltip-html takes an expression that evaluates to an HTML string
- uib-tooltip-template takes a text that specifies the location of the template

在我的情况下，我选择了uib-tooltip-html，有三个部分:

配置 控制器 超文本标记语言

例子:

(function(angular) {

//Step 1: configure $sceProvider - this allows the configuration of $sce service.

angular.module('myApp', ['uib.bootstrap'])
       .config(function($sceProvider) {
           $sceProvider.enabled(false);
       });

//Step 2: Set the tooltip content in the controller

angular.module('myApp')
       .controller('myController', myController);

myController.$inject = ['$sce'];

function myController($sce) {
    var vm = this;
    vm.tooltipContent = $sce.trustAsHtml('I am the first line <br /><br />' +
                                         'I am the second line-break');

    return vm;
}

 })(window.angular);

//Step 3: Use the tooltip in HTML (UI)

<div ng-controller="myController as get">
     <span uib-tooltip-html="get.tooltipContent">other Contents</span>
</div>

更多信息请点击这里

Jquery UI 1.10不支持在标题属性中使用html标签，因为它不是有效的html。

所以另一种解决方案是使用工具提示内容选项。 参考- http://api.jqueryui.com/tooltip/#option-content