Javascript交通灯

编程入门行业动态更新时间:2024-10-26 18:20:32

本文介绍了Javascript交通灯的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

<!DOCTYPE> <html> <body> <img id="traffic" src="assets/red.gif"> <button type="button" onclick="ChangeLights()">Change Lights</button> <script> var lights = [ "assets/red.gif", "assets/yellow.gif", "assets/green.gif", "assets/yellow.gif", ]; var index = 0; function ChangeLights() { setInterval(function () {ChangeLights();}, 1000); index = index + 1; if (index == lights.length) index = 0; var image = document.getElementById('traffic'); image.src=lights[index]; } </script> </body> </html>

您好，我正在尝试使用JavaScript制作动画脚本，以便一旦按下按钮，交通灯序列就会在计时器上从红色-黄色-绿色-黄色变化.我只希望序列循环一次.但是，当我将setInterval函数实现到该函数中时，灯光仅从红色-黄色-绿色-红色改变.谢谢您的帮助！

Hi, I am trying to make an animation script using JavaScript so that a traffic light sequence changes from red - yellow - green - yellow on a timer once a button is pressed. I only want the sequence to loop once. However, when I implemented the setInterval function into the function, the lights only change from red - yellow - green - red. Thank you for any help!

推荐答案

<div> <img height=100px id="traffic" src="upload.wikimedia/wikipedia/commons/thumb/4/45/Traffic_lights_red.svg/200px-Traffic_lights_red.svg.png"> </div> <div> <button type="button" onclick="startChangeLights()">Change Lights</button> </div>

codepen.io/anon/pen/VbKQNj?editors=1011

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Javascript交通灯

本文发布于:2023-10-30 11:31:17，感谢您对本站的认可！

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