如果选择为空，则隐藏div

Question

我有这段代码，如果在某些文本上进行了选择，并且不仅是空格，还会显示div。 但是，如果我在div上什么也不做，则选择被删除。 div仍然在那里。 是否可以检查选择项是否为空，然后隐藏div？

 $("#actual_verse").mouseup(function() { var text = ""; if (window.getSelection) { text = window.getSelection().toString(); } else if (document.selection && document.selection.type != "Control") { text = document.selection.createRange().text; } if (/\\S/.test(text)) { // Tool Tip var ele = document.getElementById('tooltip'); var sel = window.getSelection(); var rel1 = document.createRange(); rel1.selectNode(document.getElementById('cal1')); var rel2 = document.createRange(); rel2.selectNode(document.getElementById('cal2')); if (!sel.isCollapsed) { var r = sel.getRangeAt(0).getBoundingClientRect(); var rb1 = rel1.getBoundingClientRect(); var rb2 = rel2.getBoundingClientRect(); //this will place ele below the selection ele.style.top = (r.bottom - rb2.top) * 100 / (rb1.top - rb2.top) + 'px'; //this will align the right edges together ele.style.left = (r.left - rb2.left) * 100 / (rb1.left - rb2.left) + 'px'; //code to set content ele.style.display = 'block'; } // End of Tool Tip } }); 

 /* Tool Kit */ #tooltip { position:absolute; display: none; border:grey solid 1px; background: #373737; padding: 5px; border-radius: 3px; -webkit-touch-callout: none; /* iOS Safari */ -webkit-user-select: none; /* Chrome/Safari/Opera */ -khtml-user-select: none; /* Konqueror */ -moz-user-select: none; /* Firefox */ -ms-user-select: none; /* Internet Explorer/Edge */ user-select: none; /* Non-prefixed version, currently not supported by any browser */ } #cal1{ position:absolute; height:0px; width:0px; top:100px; left:100px; overflow:none; z-index:-100; } #cal2{ position:absolute; height:0px; width:0px; top:0; left:0; overflow:none; z-index:-100; } .boxes { width: 15px; height: 15px; cursor: pointer; display: inline-block; margin-right: 2px; position: relative; top: 3px; } #blue_box { background: #AAF6FF; } #green_box { background: #D6FFAA; } #orange_box { background: #FFBF98; } #purple_box { background: #D7D5FC; } #red_box { background: #FF9B9F; } #yellow_box { background: #FFF8AA; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <span id='actual_verse' class='context'>Lorem ipsum dolor sit amet, doctus expetendis no vel. At vis doming viderer prompta. Ut vis consul atomorum pericula, an sed sonet suscipit lobortis. Eos tale atqui iriure ne, eos in delenit corpora, nec laudem everti ei.</span> <div id='cal1'>&nbsp;</div> <div id='cal2'>&nbsp;</div> <div id='tooltip'> <div id='blue_box' class='boxes' title='blue_mark'></div> <div id='green_box' class='boxes' title='green_mark'></div> <div id='yellow_box' class='boxes' title='yellow_mark'></div> <div id='orange_box' class='boxes' title='orange_mark'></div> <div id='purple_box' class='boxes' title='purple_mark'></div> <div id='red_box' class='boxes' title='red_mark'></div> </div> 

Answer 1

您可以这样做：

document.getElementById("divId").style.display=(/\S/.test(text))?"block":"none";