AngularJS ng-mouseover用法及代码示例

AngularJS中的ng-mouseover指令用于在特定HTML元素上发生鼠标悬停事件时应用自定义行为。当鼠标移到特定元素上时，它可用于显示弹出警报。所有HTML元素都支持它。

用法:

<element ng-mouseover="expression"> Contents... </element>

范例1：当鼠标移到元素上时，此示例使用ng-mouseover指令显示内容。

<!DOCTYPE html> 
<html> 
      
<head> 
    <title>ng-mouseover Directive</title> 
  
    <script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
    </script> 
  
    <style type="text/css"> 
        .geek { 
            border:1px solid black; 
            width:400px; 
            background-color:green; 
            border-radius:4px; 
            height:20px; 
            color:white; 
        } 
    </style> 
</head> 
  
<body ng-app=""> 
    <center> 
        <h1 style="color:green"> 
            GeeksforGeeks 
        </h1> 
          
        <h2>ng-mouseover Directive</h2> 
          
        <div ng-init="geek=false"> 
          
            <button ng-mouseover="geek=true" 
                    ng-mouseleave="geek=false"> 
                Mouse over me! 
            </button> 
              
            <br><br> 
              
            <div class="geek" ng-show="geek"> 
                GeeksforGeeks is the computer  
                science portal for geeks. 
            </div> 
        </div> 
    </center> 
</body> 
  
</html>

输出：
将鼠标悬停在元素上之前：
ngmousedown
将鼠标悬停在元素上之后：

范例2：本示例使用ng-mouseover指令在鼠标移到元素上时显示警报消息。

<!DOCTYPE html> 
<html> 
      
<head> 
    <title>ng-mouseover Directive</title> 
  
    <script src= 
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 
    </script> 
</head> 
  
<body  ng-app="app" style="text-align:center"> 
      
    <h1 style="color:green">GeeksforGeeks</h1> 
    <h2>ng-mouseover Directive</h2> 
   
    <div ng-controller="app"> 
        Input:<input type="text" ng-mouseover="alert()"
                ng-model="click" /> 
    </div> 
      
    <script> 
        var app = angular.module("app", []); 
        app.controller('app', ['$scope', function ($scope) { 
            $scope.click = 'geeksforgeeks'; 
            $scope.alert = function () { 
                alert($scope.click); 
            } 
        }]); 
    </script> 
</body> 
  
</html>

输出：
将鼠标悬停在元素上之前：
ngmousedown
将鼠标悬停在元素上之后：

相关用法

注：本文由纯净天空筛选整理自Vishal Chaudhary 2大神的英文原创作品 AngularJS | ng-mouseover Directive。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。