本文实例为大家分享了DIV+CSS+JS实现的文字颜色渐变效果，供大家参考，具体内容如下
下面是 CSS 部分代码：
<> body{ font:12px/1.5 Microsoft Yahei; } h3{ padding:10px; margin:0; background-color:#999; color:#fff; font:16px/1.5 Microsoft Yahei; text-align:center; } .box{ position:relative; background-color:#fff; width:auto; margin:0 auto; padding:0 30px; font:700 20px/1.5 "Microsoft Yahei",Microsoft Yahei; border-top:1px dashed #ccc; border-bottom:1px dashed #ccc; height:30px; margin-top:8px; } .box a{ position:absolute; font-style:normal; white-space:nowrap; } .f999{ color:#999; }
下面是 DIV 部分代码：
<> <div> <h3><strong>CSS多彩渐变字</strong></h3> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="10" colspan="2" align="center"></td> </tr> <tr> <td width="19%" height="30" align="right">文字：</td> <td width="81%"><input name="text" type="text" id="ctext" size="30" maxlength="16" value="请在此输入您需要生成渐变色的文字" onkeyup="setDiv()" /></td> </tr> <tr> <td height="30" align="right">R值：</td> <td><select name="Rvalue" id="rvalue"></select> <span>RGB颜色中的R值（0-255）</span></td> </tr> <tr> <td height="30" align="right">G值：</td> <td><select name="Gvalue" id="gvalue"></select> <span>RGB颜色中的G值（0-255）</span></td> </tr> <tr> <td height="30" align="right">B值：</td> <td><select name="Bvalue" id="bvalue"></select> <span>RGB颜色中的B值（0-255）</span></td> </tr> <tr> <td height="30" align="right">渐变方式：</td> <td><select name="ctype" id="ctype"><option value="0">灰度渐变</option><option value="1" selected="selected">变化R值</option><option value="2">变化G值</option><option value="3">变化B值</option></select> <span>相应的数值会强制在0~255之间变化</span></td> </tr> </table> <div id="box"></div> <br /> <button>OK，上色！</button> <br /> </div>
以下是 JavaScript 部分代码：
// JavaScript代码开始 var rs = document.getElementById("rvalue"); var gs = document.getElementById("gvalue"); var bs = document.getElementById("bvalue"); function init(){ var str; for(var i=0;i<=255;i++){ var opr = document.createElement("option"); var opg = document.createElement("option"); var opb = document.createElement("option"); opr.innerHTML = i; opg.innerHTML = i; opb.innerHTML = i; switch(i){ case 100:opb.selected="selected";break; case 200:opg.selected="selected";break; } gs.appendChild(opg); rs.appendChild(opr); bs.appendChild(opb); } setDiv(); } function setDiv(){ var font = document.getElementById("ctext").value; var dObj = document.getElementById("box"); dObj.innerHTML=font; } function createData(){ var font = document.getElementById("ctext").value; var r = rs.options[rs.selectedIndex].text; var g = gs.options[gs.selectedIndex].text; var b = bs.options[bs.selectedIndex].text; var type = document.getElementById("ctype").value; if(font==""||font=="undefined"){ font="文字不能为空，使用默认文字"; document.getElementById("ctext").value = font; } colorful('box',font,r,g,b,type); } function colorful(obj,font,r,g,b,type){ var boxObj; if(typeof(obj)=="string"||typeof(obj)=="number"){ boxObj = document.getElementById(obj); }else{ boxObj = obj; } boxObj.innerHTML="<a href='#'>"+font+""; var num = boxObj.getElementsByTagName("a")[0].scrollWidth; boxObj.innerHTML=""; for(var i=0;i<=num;i++){ var j=i+1; var c=Math.round(255/num*i); switch(Number(type)){ case 0:r=c;g=c;b=c;break; case 1:r=c;break; case 2:g=c;break; case 3:b=c;break; } var iObj = document.createElement("A"); iObj.innerHTML=font; iObj.style.clip="rect(auto "+j+"px auto "+i+"px)"; iObj.style.color="rgb("+r+","+g+","+b+")"; //iObj.href="#"; // 生成的文字超链接 boxObj.appendChild(iObj); } } init();
效果图：
完整代码：
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>DIV+CSS+JS实现色彩渐变字体</title> <style type="text/css"> body{font:12px/1.5 Microsoft Yahei;} h3{padding:10px;margin:0;background-color:#999;color:#fff;font:16px/1.5 Microsoft Yahei;text-align:center;} .box{position:relative;background-color:#fff;width:auto;margin:0 auto;padding:0 30px;font:700 20px/1.5 "Microsoft Yahei",Microsoft Yahei;border-top:1px dashed #ccc; border-bottom:1px dashed #ccc;height:30px;margin-top:8px;} .box a{position:absolute;font-style:normal;white-space:nowrap;} .f999{color:#999;} a:link{text-decoration:none;} a:hover{text-decoration:underline;} a:visited{text-decoration:none;} </style> </head> <body> <div> <h3><strong>CSS多彩渐变字</strong></h3> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="10" colspan="2" align="center"></td> </tr> <tr> <td width="19%" height="30" align="right">文字：</td> <td width="81%"><input name="text" type="text" id="ctext" size="30" maxlength="16" value="请在此输入您需要生成渐变色的文字" onkeyup="setDiv()" /></td> </tr> <tr> <td height="30" align="right">R值：</td> <td><select name="Rvalue" id="rvalue"></select> <span>RGB颜色中的R值（0-255）</span></td> </tr> <tr> <td height="30" align="right">G值：</td> <td><select name="Gvalue" id="gvalue"></select> <span>RGB颜色中的G值（0-255）</span></td> </tr> <tr> <td height="30" align="right">B值：</td> <td><select name="Bvalue" id="bvalue"></select> <span>RGB颜色中的B值（0-255）</span></td> </tr> <tr> <td height="30" align="right">渐变方式：</td> <td><select name="ctype" id="ctype"><option value="0">灰度渐变</option><option value="1" selected="selected">变化R值</option><option value="2">变化G值</option><option value="3">变化B值</option></select> <span>相应的数值会强制在0~255之间变化</span></td> </tr> </table> <div id="box"></div> <br /> <button>OK，上色！</button> <br /> </div> <script type="text/javascript"> var rs = document.getElementById("rvalue"); var gs = document.getElementById("gvalue"); var bs = document.getElementById("bvalue"); function init(){ var str; for(var i=0;i<=255;i++){ var opr = document.createElement("option"); var opg = document.createElement("option"); var opb = document.createElement("option"); opr.innerHTML = i; opg.innerHTML = i; opb.innerHTML = i; switch(i){ case 100:opb.selected="selected";break; case 200:opg.selected="selected";break; } gs.appendChild(opg); rs.appendChild(opr); bs.appendChild(opb); } setDiv(); } function setDiv(){ var font = document.getElementById("ctext").value; var dObj = document.getElementById("box"); dObj.innerHTML=font; } function createData(){ var font = document.getElementById("ctext").value; var r = rs.options[rs.selectedIndex].text; var g = gs.options[gs.selectedIndex].text; var b = bs.options[bs.selectedIndex].text; var type = document.getElementById("ctype").value; if(font==""||font=="undefined"){ font="文字不能为空，使用默认文字"; document.getElementById("ctext").value = font; } colorful('box',font,r,g,b,type); } function colorful(obj,font,r,g,b,type){ var boxObj; if(typeof(obj)=="string"||typeof(obj)=="number"){ boxObj = document.getElementById(obj); }else{ boxObj = obj; } boxObj.innerHTML="<a href='#'>"+font+"</a>"; var num = boxObj.getElementsByTagName("a")[0].scrollWidth; boxObj.innerHTML=""; for(var i=0;i<=num;i++){ var j=i+1; var c=Math.round(255/num*i); switch(Number(type)){ case 0:r=c;g=c;b=c;break; case 1:r=c;break; case 2:g=c;break; case 3:b=c;break; } var iObj = document.createElement("A"); iObj.innerHTML=font; iObj.style.clip="rect(auto "+j+"px auto "+i+"px)"; iObj.style.color="rgb("+r+","+g+","+b+")"; //iObj.href="#"; // 生成的文字超链接 boxObj.appendChild(iObj); } } init(); </script> </body> </html>
以上就是本文的全部内容，希望对大家的学习有所帮助。
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