animate(box, 'translate(-' + itemWidth * num + 'px,0)', 1000, function () {
box.style.transitionDuration = '';
box.style.transform = 'translate(-800px,0)';
flag = true;
});
animate(box, `translate(-${itemWidth*num}px,0)`, 1000, function() {
box.style.transitionDuration = '';
box.style.transform = `translate(-${itemWidth*(item.length-2)}px,0)`;
flag = true;
});
let myString=`abc de ffff fas`; console.log(myString); /*输出abc de ffff fas*/
function test(a,b,c){
var a=a||10;
var a=b||15;
var c=c||20;
console.log(a+b+c);
}
function test(a=10,b=15,c=20){
console.log(a+b+c);
}
//ES5的写法
var test = function (a,b){
return a+b;
}
//ES6的箭头函数
var test2 = test(a,b)=>a+b;
var liList = document.querySelectorAll('li');
for(var i=0;i<liList.length;i++){
liList[i].index=i;
liList[i].addEventListener('mouseenter',function(){
console.log(this.index);
},false);
}
let liList = document.querySelectorAll('li');
let ArrayliList=Array.form(liList);
for(var i=0;i<liList.length;i++){
liList[i].index=i;
liList[i].addEventListener('mouseenter',function(){
let thisIndex = ArrayliList.findIndex((n) => n == this);
},false);
}
let liList = document.querySelectorAll('li');
let ArrayliList=Array.form(liList);
for(let li of liList){
li.addEventListener('mouseenter',function(){
let thisIndex = ArrayliList.findIndex((n) => n == this);
},false);
}
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