jquery的window.onload和$有什么区别 window.onload和jquery中$的区别
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onload\u662fhtml\u539f\u751f\u4e8b\u4ef6\uff0c\u7528jQuery\u7684\u65f6\u5019\u5219\u4e00\u822c\u4f7f\u7528$(document).ready()\uff0c\u4e24\u8005\u7684\u533a\u522b\u6709\uff1a
1.\u6267\u884c\u65f6\u95f4
window.onload\u5fc5\u987b\u7b49\u5230\u9875\u9762\u5185\u5305\u62ec\u56fe\u7247\u7684\u6240\u6709\u5143\u7d20\u52a0\u8f7d\u5b8c\u6bd5\u540e\u624d\u80fd\u6267\u884c\u3002
$(document).ready()\u662fDOM\u7ed3\u6784\u7ed8\u5236\u5b8c\u6bd5\u540e\u5c31\u6267\u884c\uff0c\u4e0d\u5fc5\u7b49\u5230\u52a0\u8f7d\u5b8c\u6bd5\u3002
2.\u7f16\u5199\u4e2a\u6570\u4e0d\u540c
window.onload\u4e0d\u80fd\u540c\u65f6\u7f16\u5199\u591a\u4e2a\uff0c\u5982\u679c\u6709\u591a\u4e2awindow.onload\u65b9\u6cd5\uff0c\u53ea\u4f1a\u6267\u884c\u4e00\u4e2a
$(document).ready()\u53ef\u4ee5\u540c\u65f6\u7f16\u5199\u591a\u4e2a\uff0c\u5e76\u4e14\u90fd\u53ef\u4ee5\u5f97\u5230\u6267\u884c
3.\u7b80\u5316\u5199\u6cd5
window.onload\u6ca1\u6709\u7b80\u5316\u5199\u6cd5
$(document).ready(function(){})\u53ef\u4ee5\u7b80\u5199\u6210$(function(){});
1.\u6267\u884c\u65f6\u95f4
window.onload\u5fc5\u987b\u7b49\u5230\u9875\u9762\u5185\u5305\u62ec\u56fe\u7247\u7684\u6240\u6709\u5143\u7d20\u52a0\u8f7d\u5b8c\u6bd5\u540e\u624d\u80fd\u6267\u884c\u3002
$(document).ready()\u662fDOM\u7ed3\u6784\u7ed8\u5236\u5b8c\u6bd5\u540e\u5c31\u6267\u884c\uff0c\u4e0d\u5fc5\u7b49\u5230\u52a0\u8f7d\u5b8c\u6bd5\u3002
2.\u7f16\u5199\u4e2a\u6570\u4e0d\u540c
window.onload\u4e0d\u80fd\u540c\u65f6\u7f16\u5199\u591a\u4e2a\uff0c\u5982\u679c\u6709\u591a\u4e2awindow.onload\u65b9\u6cd5\uff0c\u53ea\u4f1a\u6267\u884c\u4e00\u4e2a
$(document).ready()\u53ef\u4ee5\u540c\u65f6\u7f16\u5199\u591a\u4e2a\uff0c\u5e76\u4e14\u90fd\u53ef\u4ee5\u5f97\u5230\u6267\u884c
3.\u7b80\u5316\u5199\u6cd5
window.onload\u6ca1\u6709\u7b80\u5316\u5199\u6cd5
$(document).ready(function(){})\u53ef\u4ee5\u7b80\u5199\u6210$(function(){});
1.执行时间
window.onload必须等到页面内包括图片的所有元素加载完毕后才能执行。
$(document).ready()是DOM结构绘制完毕后就执行，不必等到加载完毕。
2.编写个数不同
window.onload不能同时编写多个，如果有多个window.onload方法，只会执行一个
$(document).ready()可以同时编写多个，并且都可以得到执行
3.简化写法
window.onload没有简化写法
$(document).ready(function(){})可以简写成$(function(){});
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