js经典实例 javascript经典实例 霓虹灯特效 js经典实例 javascript经典实例 霓虹灯特效
根据提供的标题、描述、标签及部分内容,我们可以总结出本文主要关注的是JavaScript中实现的一个经典实例——霓虹灯特效。为了更好地理解这一知识点,我们将从以下几个方面进行深入探讨: ### 一、JavaScript简介 JavaScript是一种广泛使用的脚本语言,主要用于网页开发,能够为静态页面添加动态效果,提高用户体验。JavaScript具有轻量级、解释型等特点,并且可以无缝地与HTML和CSS集成。 ### 二、霓虹灯特效概述 霓虹灯特效是指通过JavaScript在网页上模拟出类似真实世界中霓虹灯闪烁的效果。这种特效通常用于增强网站的视觉吸引力,尤其是在夜间模式或者创意展示页面中非常常见。 ### 三、实现原理 #### 1. DOM操作 利用JavaScript操作DOM(文档对象模型),动态创建表格元素并设置其样式,从而构建出霓虹灯的基础结构。 #### 2. 动态变化 通过对表格中的单元格颜色或透明度进行周期性的改变,模拟出灯光闪烁的效果。这通常涉及对时间间隔的控制以及色彩渐变技术的应用。 ### 四、代码分析 #### 1. 变量定义 - `_i` 和 `_j`:用于循环遍历表格中的单元格。 - `len`:定义了动画效果的种类数量。 - `scrollrgb`:未在给定的部分代码中出现,但可能是用来存储颜色值的变量。 - `te2_j`、`te2_jB` 等变量:看起来与特定动画效果的时间间隔或状态有关。 - `z` 和 `z2` 数组:存储了用于创建表格结构的数据,这些数据定义了哪些单元格应该显示以及它们的位置。 #### 2. 主要函数 - `createNHD()`:此函数负责创建表格元素,并设置其基本属性,如间距、宽度、高度等。从给定的代码片段可以看出,它创建了一个`<table>`元素,并设置了一些基本样式。 ### 五、实现步骤详解 1. **初始化表格**: - 创建一个`<table>`元素,并设置其样式属性。 - 设置表格的边框样式。 2. **填充表格**: - 循环遍历`z`和`z2`数组,根据其中的数据动态生成单元格。 - 对每个单元格应用不同的样式来模拟霓虹灯的效果。 3. **添加动画效果**: - 使用定时器(例如`setTimeout`或`setInterval`)来周期性地更改单元格的颜色或透明度。 - 通过调整不同单元格之间的延迟时间来实现闪烁效果的自然过渡。 4. **优化与调试**: - 在浏览器中预览效果,并根据需要调整参数。 - 确保在不同设备和浏览器中都能获得良好的兼容性和性能表现。 ### 六、总结 霓虹灯特效是JavaScript中一个有趣且实用的功能。通过对DOM的操作和对时间的精确控制,开发者可以创建出吸引用户的动态效果。本篇文章提供了实现该特效的基础框架和关键代码示例,希望能帮助读者理解和掌握如何在自己的项目中应用这一技术。
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>霓虹灯特效--wujinjian</title>
<script type="text/javascript">
var _i=0;
var _j=0;
var len=3;
var scrollrgb;
var te2_j=1;
var te2_jB=28;
var te2B=8;
var te3i=1;
var te3j=1;
var te3_iB=1;
var te3_jB=1;
var te4_js=50;
var te2Time;
var te3Time;
var te4Time;
var zorZ2=1;
//"新年"两个字所占的格子
"5_5","5_6","5_7","5_8","5_9","5_10","5_11","5_12","5_13","6_8","6_12","7_3","7_4","7_5","7_8","7_12","8_4","8_8",
"8_12","9_2","9_3","9_4","9_5","9_6","9_8","9_12","10_4","10_8","10_12","11_2","11_4","11_6","11_8","11_12","12_1",
"12_4","12_7","12_8","12_12","13_3","13_4","13_6","13_7","13_12","2_20","2_21","3_19","3_20","4_19","4_20","4_21",
"4_22","4_23","4_24","4_25","4_26","4_27","5_17","5_18","5_23","6_16","6_17","6_20","6_21","6_22","6_23","6_24","6_25",
"6_26","7_15","7_16","7_20","7_23","8_20","8_23","9_17","9_18","9_19","9_20","9_21","9_22","9_23","9_24","9_25","9_26",
"9_27","9_28","10_23","11_23","12_23","13_23");
//"快乐"两个字所占的格子
var z2=new Array("2_3","2_8","2_19","2_20","2_21","2_22","2_23","2_24","2_25","3_3","3_8","3_17","3_18","4_3","4_6","4_7","4_8",
"4_9","4_10","4_11","4_17","4_22","5_1","5_3","5_8","5_11","5_17","5_22","6_1","6_3","6_4","6_8","6_11","6_17","6_22","7_1","7_3",
"7_5","7_6","7_7","7_8","7_9","7_10","7_11","7_12","7_16","7_17","7_18","7_19","7_20","7_21","7_22","7_23","7_24","7_25","7_26",
"7_27","8_1","8_3","8_7","8_9","8_22","9_3","9_6","9_10","9_22","10_3","10_5","10_11","10_18","10_19","10_24","10_25","11_3","11_4",
"11_5","11_12","11_13","11_17","11_22","11_26","12_3","12_13","12_20","12_22","13_3","13_21","13_22","10_22");
function createNHD()
{
var tabobj=document.createElement("table");
tabobj.cellSpacing="0px";
tabobj.style.width="400px";
tabobj.style.height="200px";
tabobj.border="1";
tabobj.borderColor="gray";
var tbodyobj=document.createElement("tbody");
for(var i=0;i<15;i++)
{
剩余8页未读,继续阅读
- M_web2017-10-15感觉很炫。
- 寻梦992013-11-28仔细看看了,对我有一定帮助,谢谢了
- 小雅迷2014-03-14如果能添加上讲解就更好了
- sddlw-stack2012-05-30感觉很炫 但是对于初学者来讲 缺少解说
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