Vanilla JS: delay click event to add animation

问题:

No jQuery please!

I would love not to use jQuery for this, because it's a big library and I only need to do this single thing:

I would like to add a short delay to a click event so I can fade elements off my page using CSS.

I could post all of the code I've tried so far, but you'd get bored. So here's the one that I think is the closest:

document.getElementsByTagName('a').onclick = function (e) {

// Delay setting the location for one second
setTimeout(function() {this.href}, 90000);

var animOut = document.getElementByClassName('animateOut');
   animOut.className += 'out';
};

I've already ruled out using onbeforeunload, so hijacking the click event seems to be the best way.

Once again, I know this would be a doddle in jQuery, but I would like to avoid it if it's possible.

Thanks so much for your answers.

Ben

---

UPDATE

Thanks to commenters guest271314 and The Alpha, I've settled on this approach, but still have yet to complete the puzzle.

window.onload = function(){

var links = document.getElementsByTagName('a');
for( var i=0,il = links.length; i< il; i ++ ){
 links[i].onclick = clickHandler;
}

function clickHandler(event) {

event.preventDefault();

// Delay setting the location for one second
setTimeout(function() {

  location.href = this.href;
}, 90000);

// add `s` to `Element`
var animOut = document.getElementsByClassName("animateOut");

// iterate `animOut` elements
for (var i = 0; i < animOut.length; i++) {
   // add `out` `className` to `animOut` element at index `i`
   animOut[i].classList.add("out");
};
};
};

Having to iterate over the a tags was an addition I have learned from reading other posts (I'll link to them in a minute).

Unfortunately, the setTimeout function doesn't seem to be working. I need to refine what's in this function, but don't know in what way.

Further assistance would be most welcome.

Thanks

Ben

回答1:

You may try something like this:

document.getElementsByTagName('a').onclick = function (event) {
    event.preventDefault();
    document.getElementByClassName('animateOut').className += ' out';
    setTimeout(function() {
        location.href = this.href;
    }, 1000);
};

回答2:

There should be an "s" at document.getElementsByClassName . To add className to all animateOut elements can use a for loop; change this.href to window.location.href = e.target.href if expected result is to navigate to href of clicked a element; else leave as this.href is requirement is to refresh current window.location.href : this.href within setTimeout

document.getElementsByTagName("a").onclick = function (e) {

// Delay setting the location for one second
setTimeout(function() {window.location.href = this.href}, 90000);

// add `s` to `Element`
var animOut = document.getElementsByClassName("animateOut");
// iterate `animOut` elements
for (var i = 0; i < animOut.length; i++) {
   // add `out` `className` to `animOut` element at index `i`
   animOut[i].classList.add("out");
};

回答3:

I can't really take credit for this, the 2 users below (guest271314 and The Alpha) deserve a lot of recognition for what they helped me to achieve. The full code, with a couple of refinements, is:

window.onload = function(){

var links = document.getElementsByTagName('a');

for( var i=0,il = links.length; i< il; i ++ ){
links[i].onclick = clickHandler;
}

function clickHandler(event) {

event.preventDefault();

var travelTo = this.getAttribute("href");

// add `s` to `Element`
var animOut = document.getElementsByClassName("animateOut");

// iterate `animOut` elements
for (var i = 0; i < animOut.length; i++) {
   // add `out` `className` to `animOut` element at index `i`
   animOut[i].classList.add("out");
};

// Delay page out until the animation finishes
setTimeout(function() {
  window.location.href = travelTo;
}, 1000);
};
};