javascript onmouseout清除html元素

Question

我試圖弄清楚如何清除JavaScript onmouseleave事件上特定HTML ID的內容。 我的onmouseover效果很好，但是onmouseout卻不能。

這是一個導航欄（正在進行中），因此當用戶將鼠標懸停在標題上時，它將顯示子鏈接，但是當他們離開該菜單時，它應該關閉。

我研究的所有內容都使我一無所獲...我正在尋找有關如何完成此方案的onmouseout函數的提示。

謝謝！

這是我得到的：

     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 () {

    }

我有種感覺，盡管我會遇到一些問題……但是我認為這將使我走上正確的道路。

這是所有代碼：

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());
}

Answer 1

該代碼看起來不錯。 您需要在mouseout上刪除或隱藏DOM元素。

編輯->演示： http : //jsfiddle.net/uENE7/

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

要檢查是否觸發了mouseout事件，請添加控制台日志消息。

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