


This article analyzes the implementation method of jQuery mask layer through examples. Share it with everyone for your reference, the details are as follows:
1 Background semi-transparent mask layer style
Requires a black (or other) background and must be set to absolute positioning. The following is the css style used in the project:
/* 半透明的遮罩层 */ #overlay { background: #000; filter: alpha(opacity=50); /* IE的透明度 */ opacity: 0.5; /* 透明度 */ display: none; position: absolute; top: 0px; left: 0px; width: 100%; height: 100%; z-index: 100; /* 此处的图层要大于页面 */ display:none; }
2 jQuery to implement mask
/* 显示遮罩层 */ function showOverlay() { $("#overlay").height(pageHeight()); $("#overlay").width(pageWidth()); // fadeTo第一个参数为速度,第二个为透明度 // 多重方式控制透明度,保证兼容性,但也带来修改麻烦的问题 $("#overlay").fadeTo(200, 0.5); } /* 隐藏覆盖层 */ function hideOverlay() { $("#overlay").fadeOut(200); } /* 当前页面高度 */ function pageHeight() { return document.body.scrollHeight; } /* 当前页面宽度 */ function pageWidth() { return document.body.scrollWidth; }
3 prompt box
The purpose of the mask is to make it impossible to operate the content and highlight the prompt box. The prompt box can be made by referring to the above. The z-index can be higher than the mask layer. The main question is how to control the prompt box to be centered in the browser.
/* 定位到页面中心 */ function adjust(id) { var w = $(id).width(); var h = $(id).height(); var t = scrollY() + (windowHeight()/2) - (h/2); if(t < 0) t = 0; var l = scrollX() + (windowWidth()/2) - (w/2); if(l < 0) l = 0; $(id).css({left: l+'px', top: t+'px'}); } //浏览器视口的高度 function windowHeight() { var de = document.documentElement; return self.innerHeight || (de && de.clientHeight) || document.body.clientHeight; } //浏览器视口的宽度 function windowWidth() { var de = document.documentElement; return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth } /* 浏览器垂直滚动位置 */ function scrollY() { var de = document.documentElement; return self.pageYOffset || (de && de.scrollTop) || document.body.scrollTop; } /* 浏览器水平滚动位置 */ function scrollX() { var de = document.documentElement; return self.pageXOffset || (de && de.scrollLeft) || document.body.scrollLeft; }
Supplement:
jQuery simple mask layer plug-in:
jQuery code:
(function ($) { $.fn.ShowMask = function (options) { var defaults = { top: 150, left: 200 } var options = $.extend(defaults, options); $("html").append('<div id="ui-mask"></div><div id="ui-mask-div" style="z-index: 99999;position: fixed;top:' + options.top + 'px;left:' + options.left + 'px;"><img src="/static/imghwm/default1.png" data-src="Images/ui-loading.gif" class="lazy" alt="" /><span>操作正在进行中,请耐心等待......</span></div>') _this_ = $("#ui-mask"); _this_.height($(document).height()) _this_.show(); }; $.fn.HideMask = function (options) { _this_ = $("#ui-mask"); _this_.remove(); }; })(jQuery);
css style:
#ui-mask { background-color: #666; position: absolute; z-index: 9999; left: 0; top: 0; display: none; width: 100%; height: 100%; opacity: 0.5; filter: alpha(opacity=50); -moz-opacity: 0.5; } #ui-mask-div img { width: 50px; height: 50px; float: left; } #ui-mask-div span { height: 50px; line-height: 50px; display: block; float: left; color: Red; font-weight: bold; margin-left: 5px; }
How to use:
function btn_save() { $(this).ShowMask(); $.post('url',null,function(d,s){ $(this).HideMask(); }); }
I hope this article will be helpful to everyone in jQuery programming.

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
