实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>5.设置内联样式css()</title> <style type="text/css"> .box1 { width: 300px; height: 300px; background-color: wheat; position: relative; } .box2 { width: 100px; height: 100px; background-color: coral; position: absolute; top: 50px; left: 100px; } </style> </head> <body> <img src="../images/jsy.jpg"> <div class="box1"> <div class="box2"></div> </div> </body> </html> <script type="text/javascript" src="../js/jquery-3.3.1.js"></script> <script type="text/javascript"> var res = $('img').css('width',200) var res = $('img').css('border-radius', '10%') var res = $('img').css('box-shadow', '3px 3px 3px #888') var res = $('img').css({ 'width': '200', 'border-radius': '10%', 'box-shadow': '3px 3px 3px #888' }) var res = $('img').css('box-shadow') var res = $('img').css('width') var res = parseInt($('img').css('width'), 10) //200 res += 50 var res = $('img').css('width',res+'px') var res = $('img').width(200) var res = $('img').width('200') var res = $('img').width('200px') var res = $('img').width('200pt') var res = $('img').css('width',200) var res = $('img').width('+=100') var res = $('img').width() //300 var res = $('img').css('width','+=50') var res = $('img').width() //250 var res = $('img').offset() var res = $('img').offset().left var res = $('img').offset().top var res = $('.box2').position().left var res = $('.box2').position().top console.log(res) </script>
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实例
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>4.设置元素的类样式</title> <style type="text/css"> .circle {border-radius: 50%} .shadow {box-shadow: 3px 3px 2px #808080} </style> </head> <body> <img src="../images/xln.jpg" width="200" id="pic"> </body> </html> <script type="text/javascript" src="../js/jquery-3.3.1.js"></script> <script type="text/javascript"> $('#pic').addClass('circle') $('#pic').addClass('circle shadow') $('#pic').removeClass('circle') $('#pic').removeClass('shadow') $('#pic').removeClass('circle shadow') //如果当前元素没有添加类样式,那么自动添加上它指定的类样式 $('#pic').toggleClass('circle shadow') $('#pic').addClass('circle') $('#pic').addClass('circle shadow') $('#pic').toggleClass('circle shadow') var res = $('#pic').hasClass('circle shadow') //false $('#pic').addClass('circle shadow') var res = $('#pic').hasClass('circle shadow') //true if ($('#pic').hasClass('circle shadow')) { $('#pic').removeClass('circle shadow') } else { $('#pic').addClass('circle shadow') } console.log(res) </script>
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