Question

function random_imglink() {
    var myimages = new Array()
        //specify random images below. You can have as many as you wish
    myimages[1] = "This is text1."
    myimages[2] = "This is text2."
    myimages[3] = "This is text3."
    myimages[4] = "This is text4."
    myimages[5] = "This is text5."
    myimages[6] = "This is text6."

    var ry = Math.floor(Math.random() * myimages.length)
    if (ry == 0)
        ry = 1
    document.write('<h1 class="comingsoon">' + myimages[ry] + '</h1>')
}
random_imglink()

如何使上述代码每3秒刷新一次？比如，输出每3秒刷新一次。感谢。

Answer 1

setInterval是您查询的简便方法。

简单示例：

setInterval(function(){ alert("Hello"); }, 3000);

Answer 2

不要使用document.write。请改用document.innerHTML。

write（）方法主要用于测试：如果在HTML文档完全加载后使用它，它将删除所有现有的HTML。

当然还有setInterval，正如其他答案所暗示的那样。

Answer 3

您可以使用window.setInterval(random_imglink,3000);

$("#tab-additional_information").hide();

$(document).ready(function(){
     $(".tabs").on('click', 'a', function(e){
         e.preventDefault();
         $('#tabs-container .entry-content').hide();
         $($(this).attr("href")).show();
     });
});

Answer 4

您可以使用

function random_imglink() {
    var myimages = new Array()
        //specify random images below. You can have as many as you wish
    myimages[1] = "This is text1."
    myimages[2] = "This is text2."
    myimages[3] = "This is text3."
    myimages[4] = "This is text4."
    myimages[5] = "This is text5."
    myimages[6] = "This is text6."

    var ry = Math.floor(Math.random() * myimages.length)
    if (ry == 0)
        ry = 1
    document.body.innerHTML = '<h1 class="comingsoon">' + myimages[ry] + '</h1>';
}


window.setInterval(random_imglink, 3000);

但要小心，因为如果您的浏览器没有在时间间隔内呈现内容，您应该会看到不稳定和丢帧。更好的方法是使用requestAnimationFrame

Window.requestAnimationFrame（）方法告诉浏览器你希望执行动画并请求浏览器调用指定在下次重绘前更新动画的函数。该 method将一个回调作为一个参数，在之前调用重绘。

@objc protocol DataContextFacade{

func checkfetchFeedsWithNoSession()->NormalFeedViewModel?
}

Answer 5

我创造了一个小提琴，我认为可以做你想要的。

我希望你喜欢猫。

http://jsfiddle.net/alexjamesbrown/9cu5L666/

注意 - 我正在设置div的内部html，而不是整个文档

function random_imglink() {

    var myimages = new Array()
    //specify random images below. You can have as many as you wish
    myimages[1] = "http://placekitten.com/g/100/400"
    myimages[2] = "http://placekitten.com/g/200/250"
    myimages[3] = "http://placekitten.com/g/300/234"
    myimages[4] = "http://placekitten.com/g/500/300"
    myimages[5] = "http://placekitten.com/g/100/400"
    myimages[6] = "http://placekitten.com/g/430/100"

    var ry = Math.floor(Math.random() * myimages.length)
    if (ry == 0)
        ry = 1;

    var div = document.getElementById('myContainer');
    div.innerHTML='<h1 class="comingsoon"><img src="' + myimages[ry] + '"</img></h1>'
}
setInterval(function(){ random_imglink(); }, 3000);

每3秒刷新一次功能

5 个答案: