[英]Two Javascript functions one window.onload = Custom.init; and one window.onload = function() {
[英]Combining two Javascript functions to one window.onload not working
我有两个要在 window.onload 事件上运行的函数,但到目前为止似乎只有最后一个函数可以工作。 一个函数用于图像滑块,另一个函数从谷歌电子表格单元格中检索数据。
function fun1() { //image slider
var ul;
var li_items;
var imageNumber;
var imageWidth;
var prev, next;
var currentPostion = 0;
var currentImage = 0;
function init() {
ul = document.getElementById('image_slider');
li_items = ul.children;
imageNumber = li_items.length;
imageWidth = li_items[0].children[0].clientWidth;
ul.style.width = parseInt(imageWidth * imageNumber) + 'px';
prev = document.getElementById("prev");
next = document.getElementById("next");
prev.onclick = function() {
onClickPrev();
};
next.onclick = function() {
onClickNext();
};
}
function animate(opts) {
var start = new Date;
var id = setInterval(function() {
var timePassed = new Date - start;
var progress = timePassed / opts.duration;
if (progress > 1) {
progress = 1;
}
var delta = opts.delta(progress);
opts.step(delta);
if (progress == 1) {
clearInterval(id);
opts.callback();
}
}, opts.delay || 17);
}
function slideTo(imageToGo) {
var direction;
var numOfImageToGo = Math.abs(imageToGo - currentImage);
direction = currentImage > imageToGo ? 1 : -1;
currentPostion = -1 * currentImage * imageWidth;
var opts = {
duration: 1000,
delta: function(p) {
return p;
},
step: function(delta) {
ul.style.left = parseInt(currentPostion + direction * delta * imageWidth * numOfImageToGo) + 'px';
},
callback: function() {
currentImage = imageToGo;
}
};
animate(opts);
}
function onClickPrev() {
if (currentImage == 0) {
slideTo(imageNumber - 1);
} else {
slideTo(currentImage - 1);
}
}
function onClickNext() {
if (currentImage == imageNumber - 1) {
slideTo(0);
} else {
slideTo(currentImage + 1);
}
}
}
function fun2() {
// Google spreadsheet js
google.load('visualization', '1', {
callback: function() {
var query = new google.visualization.Query('https://docs.google.com/spreadsheets/d/1sA7M5kG6Xo8YScD1Df38PIA_G0bvhGRdqoExXg0KJTs/gviz/tq?tqx=out:html&tq?gid=0&headers=0&range=A1:C');
query.send(displayData);
}
});
function displayData(response) {
numRows = response.getDataTable().getValue(0, 0);
document.getElementById('data').innerHTML = numRows;
}
}
var addFunctionOnWindowLoad = function(callback) {
if (window.addEventListener) {
window.addEventListener('load', callback, false);
} else {
window.attachEvent('onload', callback);
}
}
addFunctionOnWindowLoad(fun1);
addFunctionOnWindowLoad(fun2);
这是我试过链接的答案,但我似乎无法弄清楚我哪里出错了。
这就是我最终要做的,现在所有功能都可以工作了。
var ul;
var li_items;
var imageNumber;
var imageWidth;
var prev, next;
var currentPostion = 0;
var currentImage = 0;
function init() {
ul = document.getElementById('image_slider');
li_items = ul.children;
imageNumber = li_items.length;
imageWidth = li_items[0].children[0].clientWidth;
ul.style.width = parseInt(imageWidth * imageNumber) + 'px';
prev = document.getElementById("prev");
next = document.getElementById("next");
prev.onclick = function() {
onClickPrev();
};
next.onclick = function() {
onClickNext();
};
}
function animate(opts) {
var start = (new Date());
var id = setInterval(function() {
var timePassed = (new Date()) - start;
var progress = timePassed / opts.duration;
if (progress > 1) {
progress = 1;
}
var delta = opts.delta(progress);
opts.step(delta);
if (progress == 1) {
clearInterval(id);
opts.callback();
}
}, opts.delay || 17);
//return id;
}
function slideTo(imageToGo) {
var direction;
var numOfImageToGo = Math.abs(imageToGo - currentImage);
// slide toward left
direction = currentImage > imageToGo ? 1 : -1;
currentPostion = -1 * currentImage * imageWidth;
var opts = {
duration: 1000,
delta: function(p) {
return p;
},
step: function(delta) {
ul.style.left = parseInt(currentPostion + direction * delta * imageWidth * numOfImageToGo) + 'px';
},
callback: function() {
currentImage = imageToGo;
}
};
animate(opts);
}
function onClickPrev() {
if (currentImage === 0) {
slideTo(imageNumber - 1);
} else {
slideTo(currentImage - 1);
}
}
function onClickNext() {
if (currentImage == imageNumber - 1) {
slideTo(0);
} else {
slideTo(currentImage + 1);
}
}
window.onload = init;
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
if (oldonload) {
oldonload();
}
func();
}
}
}
function fun2() {
// Google spreadsheet js
google.load('visualization', '1', {
callback: function() {
var query = new google.visualization.Query('https://docs.google.com/spreadsheets/d/1sA7M5kG6Xo8YScD1Df38PIA_G0bvhGRdqoExXg0KJTs/gviz/tq?tqx=out:html&tq?gid=0&headers=0&range=A1:C');
query.send(displayData);
}
});
function displayData(response) {
numRows = response.getDataTable().getValue(0, 0);
document.getElementById('data').innerHTML = numRows;
}
}
addLoadEvent(fun2);
addLoadEvent(function() {
});
不久前我发现了这个功能,信不信由你,我仍然需要经常使用它。 addEventLoad()
只需在传递要加载的函数时调用addEventLoad
。
“这种工作方式相对简单:如果 window.onload 还没有被分配一个函数,则传递给 addLoadEvent 的函数被简单地分配给 window.onload。如果 window.onload 已经被设置,则创建一个全新的函数首先调用原始的 onload 处理程序,然后再调用新的处理程序。”
此代码段将在window.onload
上加载 3 个函数
片段
function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function') { window.onload = func; } else { window.onload = function() { if (oldonload) { oldonload(); } func(); } } } function alert1() { alert("First Function Loaded"); } function alert2() { alert("Second Function Loaded"); } function alert3(str) { alert("Third Function Loaded; Msg: " + str); } addLoadEvent(alert1); addLoadEvent(alert2); addLoadEvent(function() { alert3("This works"); });
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