中的示例
我有一个javascript函数,当我点击输入时显示或隐藏"span ",当用户填写表单时显示提示:
function prepareInputsForHints() {
var inputs = document.getElementsByTagName("input");
for (var i=0; i<inputs.length; i++){
// test to see if the hint span exists first
if (inputs[i].parentNode.getElementsByTagName("span")[0]) {
// the span exists! on focus, show the hint
inputs[i].onfocus = function () {
this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
}
// when the cursor moves away from the field, hide the hint
inputs[i].onblur = function () {
this.parentNode.getElementsByTagName("span")[0].style.display = "none";
}
}
}
}
我的问题是,当我尝试添加一个链接到提示文本,用户不能点击它,因为它首先注册与onblur事件和提示消失,所以我想知道如何修改这个函数,使它不隐藏当我点击提示。
你可以使用一个布尔变量来测试用户是否将鼠标放在你的提示上,如果是onblur而不是mouseOver则隐藏你的提示。
在你的循环中像这样:
var inputs = document.getElementsByTagName("input");
for (var i=0; i<inputs.length; i++){
(function(i) {
// Let the code cleaner :)
var span = inputs[i].nextElementSibling;
span.onmouseover = function() { this.isOver = true; }
span.onmouseout = function() { this.isOver = false; if(!inputs[i].isFocus) inputs[i].onblur(); }
// the span exists! on focus, show the hint
inputs[i].onfocus = function () {
this.isFocus = true;
span.style.display = "inline";
}
// when the cursor moves away from the field, hide the hint
inputs[i].onblur = function () {
this.isFocus = false;
if(!span.isOver) span.style.display = "none";
}
})(i);
}
我放了一个自我执行的函数只是为了保持var i
的作用域,你不会有mouseout函数的问题。
EDIT:更新了示例
获取下一个span的代码将不起作用,所以我更改为nextElementSibling,因为您在jsfiddler.
这是新的工作代码:
$(function(prepareInputsForHints) {
var inputs = document.getElementsByTagName("input");
for (var i=0; i<inputs.length; i++){
(function(i) {
// Let the code cleane
var span = inputs[i].nextElementSibling;
if(span instanceof HTMLSpanElement) {
if(span.className == "hint") {
span.onmouseover = function() { this.isOver = true; }
span.onmouseout = function() { this.isOver = false; if(!inputs[i].isFocus) inputs[i].onblur(); }
// the span exists! on focus, show the hint
inputs[i].onfocus = function () {
this.isFocus = true;
span.style.display = "inline";
}
// when the cursor moves away from the field, hide the hint
inputs[i].onblur = function () {
this.isFocus = false;
if(!span.isOver) span.style.display = "none";
}
}
}
})(i);
}
});