javascript onmouseout clear html element

javascript onmouseout clear html element

本文关键字：element html clear onmouseout javascript      更新时间：2023-09-26

我正试图弄清楚如何在JavaScript onmouseleave事件中清除特定HTML ID的内容。我的onmouseover工作得很好，但onmouseout不行。

这是一个导航栏（正在进行中），因此当用户将鼠标悬停在标题上时，它会显示子链接，但当用户离开该菜单时，它应该会关闭。

我所研究的一切都使我一无所获。。。我正在寻找关于如何完成这个场景的onmouseout函数的提示。

谢谢！

这是我得到的：

     document.getElementById('theHeaderTag1').onmouseover = function () {
    for (var i = 0; i <= Level1Items.length - 1; i++) {
        //Print Items in Level1
        var createLevel1CellTag = document.createElement('tr');
        createLevel1CellTag.id = 'Level1';
        var Level1TextNode = document.createTextNode(Level1Items[i]);
        createLevel1CellTag.appendChild(Level1TextNode);
        document.getElementById('theHeaderTag0').appendChild(createLevel1CellTag);
    }
    document.getElementById('theHeaderTag1').onmouseout = function () {
    }

不过，我有一种感觉，我会遇到一些问题。。。但我认为这会让我走上正轨。

以下是所有代码：

var siteUrl = '/sites/dev/';
var theCounter = 0;
ExecuteOrDelayUntilScriptLoaded(retrieveListItems, "sp.js");
function retrieveListItems() {
var clientContext = new SP.ClientContext(siteUrl);
var oList = clientContext.get_web().get_lists().getByTitle('myList');
var camlQuery = new SP.CamlQuery();
camlQuery.set_viewXml("<Where><And><IsNotNull><FieldRef Name='Title' /></IsNotNull> <IsNotNull><FieldRef Name='TitleLink' /></IsNotNull></And></Where>");
this.collListItem = oList.getItems(camlQuery);
clientContext.load(collListItem);
clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded),  Function.createDelegate(this, this.onQueryFailed));
 }

//Where all the magic happens
function onQuerySucceeded(sender, args) {
//Create an Array for each column in the SharePoint List that will be used in the NavPart
var theHeaders = new Array();
var HeaderLinks = new Array();
var Level1Items = new Array();
var getTheTableTag = document.getElementById('theTable');
var listItemEnumerator = collListItem.getEnumerator();
while (listItemEnumerator.moveNext()) {
    var oListItem = listItemEnumerator.get_current();
    theCounter += 1;
    //Build an Array for the column elements.
    theHeaders[theCounter - 1] = oListItem.get_item('Title');
    Level1Items[theCounter - 1] = oListItem.get_item('Level1');

};
var headersResult = _.uniq(theHeaders);
var headerLinkResult = _.uniq(HeaderLinks);
//Create Headers on the Web Part
for (var i = 0; i <= headersResult.length - 1; i++) {
    var createTheHeaderTag = document.createElement('th');
    createTheHeaderTag.id = 'theHeaderTag' + i;
    var TheHeaderTagTextNode = document.createTextNode(headersResult[i]);
    createTheHeaderTag.appendChild(TheHeaderTagTextNode);
    getTheTableTag.appendChild(createTheHeaderTag);

}
document.getElementById('theHeaderTag1').onmouseover = function () {
    for (var i = 0; i <= Level1Items.length - 1; i++) {
        //Print Items in Level1
        var createLevel1CellTag = document.createElement('tr');
        createLevel1CellTag.id = 'Level1';
        var Level1TextNode = document.createTextNode(Level1Items[i]);
        createLevel1CellTag.appendChild(Level1TextNode);
        document.getElementById('theHeaderTag0').appendChild(createLevel1CellTag);
    }
    document.getElementById('theHeaderTag1').onmouseout = function () {
    }
}
}
function onQueryFailed(sender, args) {
alert('Request failed. ' + args.get_message() + ''n' + args.get_stackTrace());
}

代码看起来不错。您需要移除或隐藏mouseout上的DOM元素。

编辑->演示：http://jsfiddle.net/uENE7/

document.getElementById('theHeaderTag1').onmouseout = function () {
   document.getElementById('theHeaderTag0').removeChild("Level1")
}

若要检查是否触发了mouseout事件，请添加控制台日志消息。

document.getElementById('theHeaderTag1').onmouseout = function () {
   console.log("mouseout event triggered");
   document.getElementById('theHeaderTag0').removeChild("Level1");
}
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