我正在定義爲每個新會話創建的類Session
。onclick函數沒有被調用? - 無錯誤
window.onload
,Session對象有一個鼠標點擊事件監聽器,點擊後它觸發處理器,並檢查錨點標記是否被點擊並保存href 2.保存鼠標點擊的x和y。
問題:函數user.onclick不起作用。不調用anchorLinkClickHandler(); OR window.addEventListener,即保存x和y的click事件處理程序。沒有錯誤。我認爲下面的代碼有一個語法問題..不知道是什麼。想法?
如圖(以在window.onload):
var user = new UserSession('001');
user.onclick = function(event) {
// check if an anchor tag link is clicked, if so, save the href.
user.aTagHref = anchorLinkClickHandler();
// CLICK event listener - save the x and y of mouse click
window.addEventListener("load", function(event){
document.body.addEventListener("click", handleClick)
});
}
這裏是全碼:
function UserSession(campaignId) {
this.campaignId = campaignId;
var aTagHref = aTagHref;
this.greeting = function() {
alert('Hi! I\'m ' + this.name + '.');
};
// get the position of click - Event Listener Function
this.getPosition = function(el) {
var xPosition = 0;
var yPosition = 0;
while (el) {
if (el.nodeName == "BODY") {
// deal with browser quirks with body/window/document and page scroll
var xScrollPos = el.scrollLeft || document.documentElement.scrollLeft;
var yScrollPos = el.scrollTop || document.documentElement.scrollTop;
xPosition += (el.offsetLeft - xScrollPos + el.clientLeft);
yPosition += (el.offsetTop - yScrollPos + el.clientTop);
} else {
xPosition += (el.offsetLeft - el.scrollLeft + el.clientLeft);
yPosition += (el.offsetTop - el.scrollTop + el.clientTop)
}
el = el.offsetParent;
}
return {
x: xPosition,
y: yPosition,
a: "hahah",
};
};
// On click handler
this.handleClick = function(event) {
// Return the current element clicked on
var el = event.currentTarget;
// Return the offset values of the element clicked on
var relOffsetValues = getPosition(el);
// Find the true value of x and y by adding the offset and the to clicked value of x and y
var realValueX = (relOffsetValues.x + event.clientX);
var realValueY = (relOffsetValues.y + event.clientY);
// display the x and y of the mouse click
alert("Clicks x:" + realValueX + ", y:" + realValueY);
// alert("clientx:" + event.clientX + ", real valie:" + realValueX);
}
// On click ANCHOR TAGS SAVE THEM
// Anchor Tags - Capture the href of the link clicked
this.anchorLinkClickHandler = function() {
var aTags = document.getElementsByTagName('a');
for (var i = aTags.length - 1; i >= 0; --i) {
aTags[i].onclick = function() {
aTagHref[i] = this.getAttribute("href");
alert(aTagHref);
};
}
}
// END OF CLASS
}
的window.onload函數(其中一切稱)
(){var user = new UserSession('001');
user.onclick = function(event) {
// check if an anchor tag link is clicked, if so, save the href.
user.aTagHref = anchorLinkClickHandler();
// CLICK event listener - save the x and y of mouse click
window.addEventListener("load", function(event){
document.body.addEventListener("click", handleClick)
});
}
// SCROLL Event Listener
// Get the x and y of the scroll
window.addEventListener("scroll", function(event) {
// document.getScroll= function(){
var sx, sy;
if(window.pageYOffset!= undefined){
sx = pageXOffset;
sy = pageYOffset;
console.log(sx +" if " + sy);
// return [pageXOffset, pageYOffset];
}
else{
var d= document, r= d.documentElement, b= d.body;
sx= r.scrollLeft || b.scrollLeft || 0;
sy= r.scrollTop || b.scrollTop || 0;
console.log(sx +" else " + sy);
// return [sx, sy];
}
// }
});
};
你設置'user.onclick =函數(事件){...}'你的代碼的開頭,然後永不調用功能。 – gyre
@gyre - 也許OP認爲'onclick'在某種程度上是一個特殊的屬性 - 它是......在HTMLElements上,但對常規對象沒有超能力 –
@JaromandaX好點。值得一提的是,'user'是'UserSession'自定義類的一個實例,因此是POJO(Plain Ol'JavaScript Object)。 – gyre