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Detailed explanation of jquery font size settings and plug-ins
- 伊谢尔伦Original
- 2017-06-17 09:38:181851browse
JQuery font size setting, Get the font size first and process it. Save the modified value. The slice() method returns selected elements from an existing array.
arrayObject.slice(start,end)。
start Required. Specifies where to start the selection. If negative, it specifies the position from the end of the array. That is, -1 refers to the last element, -2 refers to the second to last element, and so on.
end Optional. Specifies where the selection ends. This parameter is the array index at the end of the array fragment. If this parameter is not specified, the split array contains all elements from start to the end of the array. If this parameter is negative, it specifies the elements starting from the end of the array.
jQuery code is as follows:
<script type="text/javascript">
$(function(){
$("span").click(function(){
//获取para的字体大小
var thisEle = $("#para").css("font-size");
//parseFloat的第二个参数表示转化的进制，10就表示转为10进制
var textFontSize = parseFloat(thisEle , 10);
//javascript自带方法
var unit = thisEle.slice(-2); //获取单位
var cName = $(this).attr("class");
if(cName == "bigger"){
textFontSize += 2;
}else if(cName == "smaller"){
textFontSize -= 2;
}
//设置para的字体大小
$("#para").css("font-size", textFontSize + unit );
});
});
</script>html code is as follows:
<body>
<div class="msg">
<div class="msg_caption">
<span class="bigger" >放大</span>
<span class="smaller" >缩小</span>
</div>
<div>
<p id="para" >
This is some text. This is some text. This is some text. This is some text. This
is some text. This is some text. This is some text. This is some text. This is some
text. This is some text. This is some text. This is some text. This is some text.
This is some text. This is some text. This is some text. This is some text. This
is some text. This is some text.
</p>
</div>
</div>
</body>Introducing a jQuery font size adjustment plug-in PDFontSize
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="pandao " />
<meta name="keywords" content="pandao " />
<meta name="description" content="pandao " />
<meta name="author" content="pandao" />
<!--
<link rel="stylesheet" type="text/css" href="css/style.css" />
<link rel="shortcut icon" href="images/favicon.ico" />
-->
<title>jQuery调整字体大小插件PDFontSize </title>
<style type="text/css">
*{margin:0;padding:0;}
body{font-size:14px;color:#444;font-family:"微软雅黑",Arial;background:#fff;}
a{color:#444;text-decoration: none;}
a:hover{color:#065BC2;text-decoration: none;}
.clear{clear:both;}
img{border:none;vertical-align: middle;}
ul{list-style: none;}
#test{overflow:hidden;width:50%;margin:30px auto 10px auto;background:#f6f6f6;border:1px solid #eee;padding:15px;}
#toolbar{width:300px;margin:0 auto;text-align:center;}
/*
按钮样式，也可通过插件参数设置
.PDFontSizeBtns{display:inline-block;padding:2px 5px;background:#f6f6f6;border:1px solid #eee;cursor: pointer;}
.PDFontSizeBtns:hover{border:1px solid #ddd;background:#eee;}*/
</style>
</head>
<body>
<div id="test">jQuery.PDFontSize()</div>
<div id="toolbar">
<a href="javascript:;" class="PDFontSizeBtns" id="minus">A-</a>
<a href="javascript:;" class="PDFontSizeBtns" id="default">A</a>
<a href="javascript:;" class="PDFontSizeBtns" id="plus">A+</a>
</div>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
<script type="text/javascript">
jQuery.easing['jswing']=jQuery.easing['swing'];jQuery.extend(jQuery.easing,
{def:'easeOutQuad',swing:function(x,t,b,c,d)
{return jQuery.easing[jQuery.easing.def](x,t,b,c,d)},easeInQuad:function(x,t,b,c,d)
{return c*(t/=d)*t+b},easeOutQuad:function(x,t,b,c,d)
{return-c*(t/=d)*(t-2)+b},easeInOutQuad:function(x,t,b,c,d)
{if((t/=d/2)<1)return c/2*t*t+b;return-c/2*((--t)*(t-2)-1)+b},easeInCubic:function(x,t,b,c,d)
{return c*(t/=d)*t*t+b},easeOutCubic:function(x,t,b,c,d)
{return c*((t=t/d-1)*t*t+1)+b},easeInOutCubic:function(x,t,b,c,d)
{if((t/=d/2)<1)return c/2*t*t*t+b;return c/2*((t-=2)*t*t+2)+b},easeInQuart:function(x,t,b,c,d)
{return c*(t/=d)*t*t*t+b},easeOutQuart:function(x,t,b,c,d)
{return-c*((t=t/d-1)*t*t*t-1)+b},easeInOutQuart:function(x,t,b,c,d)
{if((t/=d/2)<1)return c/2*t*t*t*t+b;return-c/2*((t-=2)*t*t*t-2)+b},easeInQuint:function(x,t,b,c,d)
{return c*(t/=d)*t*t*t*t+b},easeOutQuint:function(x,t,b,c,d)
{return c*((t=t/d-1)*t*t*t*t+1)+b},easeInOutQuint:function(x,t,b,c,d)
{if((t/=d/2)<1)return c/2*t*t*t*t*t+b;return c/2*((t-=2)*t*t*t*t+2)+b},easeInSine:function(x,t,b,c,d)
{return-c*Math.cos(t/d*(Math.PI/2))+c+b},easeOutSine:function(x,t,b,c,d)
{return c*Math.sin(t/d*(Math.PI/2))+b},easeInOutSine:function(x,t,b,c,d)
{return-c/2*(Math.cos(Math.PI*t/d)-1)+b},easeInExpo:function(x,t,b,c,d)
{return(t==0)?b:c*Math.pow(2,10*(t/d-1))+b},easeOutExpo:function(x,t,b,c,d)
{return(t==d)?b+c:c*(-Math.pow(2,-10*t/d)+1)+b},easeInOutExpo:function(x,t,b,c,d)
{if(t==0)return b;if(t==d)return b+c;if((t/=d/2)<1)return c/2*Math.pow(2,10*(t-1))+b;return c/2*(-Math.pow(2,-10*--t)+2)+b},easeInCirc:function(x,t,b,c,d)
{return-c*(Math.sqrt(1-(t/=d)*t)-1)+b},easeOutCirc:function(x,t,b,c,d){return c*Math.sqrt(1-(t=t/d-1)*t)+b},easeInOutCirc:function(x,t,b,c,d)
{if((t/=d/2)<1)return-c/2*(Math.sqrt(1-t*t)-1)+b;return c/2*(Math.sqrt(1-(t-=2)*t)+1)+b},easeInElastic:function(x,t,b,c,d)
{var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d)==1)return b+c;if(!p)p=d*.3;if(a<Math.abs(c)){a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);
return-(a*Math.pow(2,10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p))+b},easeOutElastic:function(x,t,b,c,d)
{var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d)==1)return b+c;if(!p)p=d*.3;if(a<Math.abs(c))
{a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);return a*Math.pow(2,-10*t)*Math.sin((t*d-s)*(2*Math.PI)/p)+c+b},easeInOutElastic:function(x,t,b,c,d)
{var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d/2)==2)return b+c;if(!p)p=d*(.3*1.5);if(a<Math.abs(c))
{a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);if(t<1)return-.5*(a*Math.pow(2,10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p))+b;
return a*Math.pow(2,-10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p)*.5+c+b},easeInBack:function(x,t,b,c,d,s)
{if(s==undefined)s=1.70158;return c*(t/=d)*t*((s+1)*t-s)+b},easeOutBack:function(x,t,b,c,d,s)
{if(s==undefined)s=1.70158;return c*((t=t/d-1)*t*((s+1)*t+s)+1)+b},easeInOutBack:function(x,t,b,c,d,s)
{if(s==undefined)s=1.70158;if((t/=d/2)<1)return c/2*(t*t*(((s*=(1.525))+1)*t-s))+b;
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t+s)+2)+b},easeInBounce:function(x,t,b,c,d)
{return c-jQuery.easing.easeOutBounce(x,d-t,0,c,d)+b},easeOutBounce:function(x,t,b,c,d){if((t/=d)<(1/2.75))
{return c*(7.5625*t*t)+b}else if(t<(2/2.75)){return c*(7.5625*(t-=(1.5/2.75))*t+.75)+b}else if(t<(2.5/2.75))
{return c*(7.5625*(t-=(2.25/2.75))*t+.9375)+b}else{return c*(7.5625*(t-=(2.625/2.75))*t+.984375)+b}},easeInOutBounce:function(x,t,b,c,d)
{if(t<d/2)return jQuery.easing.easeInBounce(x,t*2,0,c,d)*.5+b;return jQuery.easing.easeOutBounce(x,t*2-d,0,c,d)*.5+c*.5+b}});
(function() {
/**
* jQuery调整字体大小插件PDFontSize (全兼容)
*/
$.fn.extend({
PDFontSize : function(_params) {
//默认参数
var params = {
max : 40, //最大的字体大小
min : 12, //最小的字体大小
change : 5, //每次增加或减小的大小
plusBtn : '', //#plus
minusBtn : '', //#minus
defaultBtn : '', //#default
animate : true, //是否使用动画变化
animateTime : 300, //动画变化时间
easing : 'easeOutQuart', //动画缓动，需要使用jQuery.easing插件
btnStyle : {display:'inline-block', padding:'2px 5px', background:'#f6f6f6', border:'1px solid #eee', cursor: 'pointer'}, //按钮样式(正常)
btnHoverStyle : {border:'1px solid #ddd', background:'#eee'} //按钮样式(鼠标经过)
};
if(_params) params = $.extend(params, _params); //扩展默认参数
var contentObj = $(this); //内容层对象
var fontSizeHandler = function(fontSize) {
//alert('fontSizeHandler();');
if(params.animate == true)
{
contentObj.animate({fontSize : fontSize + 'px'}, params.animateTime, params.easing);
}
else
{
contentObj.css({fontSize : fontSize + 'px'});
}
};
if($(params.plusBtn))
{
$(params.plusBtn).bind('click', function() {
var fontSize = parseInt(contentObj.css('fontSize'));
if(fontSize < params.max)
{
fontSize += params.change;
if(fontSize > params.max) fontSize = params.max;
fontSizeHandler(fontSize);
}
});
}
if($(params.minusBtn))
{
$(params.minusBtn).bind('click', function() {
var fontSize = parseInt(contentObj.css('fontSize'));
if(fontSize > params.min)
{
fontSize -= params.change;
if(fontSize < params.min) fontSize = params.min;
fontSizeHandler(fontSize);
}
});
}
if($(params.defaultBtn))
{
$(params.defaultBtn).bind('click', function() {
fontSizeHandler(params.min);
});
}
$('.PDFontSizeBtns').css(params.btnStyle);
$('.PDFontSizeBtns').hover(function() {
$(this).css(params.btnHoverStyle);
}, function() {
$(this).css(params.btnStyle);
});
$('.PDFontSizeBtns').each(function() {
$(this).click(function() {
$(this).blur();
});
});
return this;
}
});
})();
//使用方法
$(function() {
$('#test').PDFontSize({
max : 100,
//min : 12,
change : 20,
plusBtn : '#plus',
minusBtn : '#minus',
defaultBtn : '#default'
});
});
</script>
</body>
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