Comparative study on get and post request methods in jQuery
In front-end development, using jQuery to make network requests is a very common operation. In jQuery, the two commonly used network request methods are get and post. This article will deeply study the characteristics, advantages and disadvantages of these two request methods, and compare them through specific code examples.
1. Get request method
Features
- The get request is a request method to obtain data from the server.
- Send data to the server via URL.
- Applicable to situations where the amount of requested data is small.
- The request is displayed in the URL in clear text and is not suitable for transmitting sensitive information.
- The request speed is fast and can be cached.
Code sample
$.get("data.json", function(data) { console.log("成功加载数据:" + data); });
2. post request method
Features
- The post request is a request to submit data to the server Way.
- Send data to the server through the request body, which is suitable for transmitting large amounts of data or sensitive information.
- The request will not be displayed in clear text in the URL.
- The request speed is slow and cannot be cached.
Code sample
$.post("submit.php", { name: "张三", age: 25 }, function(data) { console.log("提交成功,返回数据:" + data); });
3. Comparison of get and post
Data transmission
- Get request transmits data through URL, restrictions Larger; post request transmits data through the request body, and the limit is smaller.
- Get request is suitable for obtaining data; post request is suitable for submitting data.
Security
- The get request displays the data in clear text in the URL, which is unsafe; the post request sends the data into the request body, which is relatively safe.
Cache
- Get requests can be cached, which improves efficiency; post requests cannot be cached, and efficiency is low.
Usage scenarios
- get request is suitable for obtaining data, such as query; post request is suitable for submitting data, such as form submission.
Conclusion
Get and post request methods have their own advantages and disadvantages. Choose the appropriate request method according to specific needs. get is suitable for obtaining data and the data volume is small, and post is suitable for submitting data and the data volume is large or sensitive. Reasonable selection of request methods can improve the efficiency and security of the program.
The above is a comparative study on the get and post request methods in jQuery. I hope it can help you.
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实现方法:1、用“$("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。


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