问题描述
当我在“ frame-2”元素上滚动时,我想每300毫秒更改一次单词。这个词每300毫秒更改一次,并停在我数组中的每个词上。
滚动功能有效。每个单词的停止也可以,但是延迟不超过300毫秒,并且几乎立即更改单词。您看到我看不到的错误吗?
function interval(func,wait,times){
var interv = function(w,t){
return function(){
if(typeof t === "undefined" || t-- > 0){
setTimeout(interv,w);
try{
func.call(null);
}
catch(e){
t = 0;
throw e.toString();
}
}
};
}(wait,times);
setTimeout(interv,wait);
};
var words21 = ["communication.","image.","concept.","référencement.","stratégie.","contenu.","social média."];
var text21 = "repensent votre <span class='surlignement-rouge-text'>communication.</span>";
var i21;
var wi21;
function _getChangedText21() {
i21 = (i21 + 1);
if (words21[i21] != undefined) {
return text21.replace(/communication./,words21[i21]);
} else {
return text21.replace(/communication./,words21[wi21]);
wi21 = (wi21 + 1);
}
}
$(window).scroll(function() {
text21.replace(/communication./,words21[0]);
i21 = 0;
wi21 = 1;
x = 0;
var hT20 = $('#frame-2').offset().top,hH20 = $('#frame-2').outerHeight(),wH20 = $(window).height(),wS20 = $(this).scrollTop();
if (wS20 > (hT20+hH20-wH20)) {
interval(function _getInterval21() {
interval(function _changeText21() {
var txt21 = _getChangedText21();
document.getElementById("changer2").innerHTML = txt21;
},300,8);
selectwords21 = words21[0];
words21.shift();
words21.push(selectwords21);
},2000,6);
selectwords21 = words21[0];
words21.shift();
words21.push(selectwords21);
selectwords21 = words21[0];
words21.shift();
words21.push(selectwords21);
}
});
非常感谢, BadWoo
编辑:这是一个Codepen示例:https://codepen.io/BadWoo/pen/MWyQbPB
解决方法
首先t
永远不会是"undefined"
,但可以是undefined
。其次,不要调用setTimeout(interv,wait)
,而是执行setTimeout(interv(),wait)
,因为interv返回一个函数,而这就是您要执行的函数。
如果您要做的是将changer2
内的文本更改为旋转单词列表,以代替“交流”。您可以用几行代码来完成此操作(请参见下面的示例)。
- 无需继续移动和推送单词-只需使用模运算符
%
- 无需嵌套调用
setTimout
-使用setInterval
假设我已经正确理解了您要实现的目标,这是工作代码(根据需要调整时间):
function changeWords(){
var words = ["communication.","image.","concept.","référencement.","stratégie.","contenu.","social média."];
var i = 1;
setInterval( () => {
document.querySelector('.surlignement-rouge-text').innerHTML = words[i++ % words.length];
},1000);
}
// You could call this from your scroll handler!
changeWords();
.surlignement-rouge-text{
color: red
}
<span id="changer2">repensent votre <span class='surlignement-rouge-text'>communication.</span></span>
进一步理解了您的要求之后,似乎代码确实需要稍微复杂些,但不需要太多!
var words = ["communication.","social média."];
async function changeWords(interval){
return new Promise( resolve => {
var i = 0;
var timer = setInterval( () => {
document.querySelector('.surlignement-rouge-text').innerHTML = words[i++];
if(i == words.length){
clearInterval(timer);
resolve();
}
},interval);
});
}
async function cycleWords(shortInterval,longInterval,i){
await changeWords(shortInterval);
document.querySelector('.surlignement-rouge-text').innerHTML = words[i % words.length];
setTimeout(() => cycleWords(shortInterval,i+1),longInterval);
}
// You could call this from your scroll handler!
cycleWords(300,2000,0);
.surlignement-rouge-text{
color: red
}
<span id="changer2">repensent votre <span class='surlignement-rouge-text'>communication.</span></span>