Question

如何检测用户选择（用鼠标突出显示）是否属于某个元素的子元素？

示例：

<div id="parent">
   sdfsdf
   <div id="container">
       some 
      <span>content</span>
   </div>
   sdfsd
</div>

伪代码：

if window.getSelection().getRangeAt(0) is a child of #container
 return true;
else
 return false;

Answer 1

使用jQuery on() event handler

$(function() {
     $("#container > * ").on("click", 
         function(event){
            return true;
         });
     });

修改： http://jsfiddle.net/9DMaG/1/

<div id="parent">outside
    <div id="container">
        outside
        <span>first_span_clickMe</span>
        <span>second_span_clickMe</span>
    </div>
 outside</div>


$(function() {
   $("#container > span").on("click", function(){
       $('body').append("<br/>child clicked");
   });
});

Answer 2

好的，我设法在一个＆＃34;脏＆＃34;办法。代码可以使用改进，但它为我做了工作，我现在懒得改变它。基本上我遍历选择检查的对象，如果在某个时刻它到达具有指定类的元素。

    var inArticle = false;
    // The class you want to check:
    var parentClass = "g-body"; 

    function checkParent(e){
        if(e.parentElement && e.parentElement != $('body')){
            if ($(e).hasClass(parentClass)) {
                inArticle = true;
                return true;
            }else{
                checkParent(e.parentElement);
            }
        }else{
            return false;
        }
    }


    $(document).on('mouseup', function(){
        // Check if there is a selection
        if(window.getSelection().type != "None"){
            // Check if the selection is collapsed
            if (!window.getSelection().getRangeAt(0).collapsed) {
                inArticle = false;

                // Check if selection has parent
                if (window.getSelection().getRangeAt(0).commonAncestorContainer.parentElement) {
                    // Pass the parent for checking
                    checkParent(window.getSelection().getRangeAt(0).commonAncestorContainer.parentElement);
                };


                if (inArticle === true) {
                    // If in element do something
                    alert("You have selected something in the target element");
                }
            };
        }
    });

JSFiddle

检测html元素中的用户选择

2 个答案: