How to get all the values ​​of the form in js (code attached)

The content of this article is about how to get all the values ​​of the form in js (with code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Usually obtaining all the input boxes of the form is to obtain the node value through the document dom object

<form>
<input id="a1" type="input" value="" name="a1"><br>
<input id="a2" type="input" value="" name="a2"><br>
<input id="a3" type="input" value="" name="a3"><br>
<input id="a4" type="input" value="" name="a4"><br>
<input id="submit" type="button" value="提交" name="submit">
</form>

Let’s compare it through two methods:

<script>
$(function() {
$(&#39;#submit&#39;).click(function() {
						
//方法1：
var a1 = document.getElementsById("a1").value;
//var a1 = document.getElementsByName("a1").value;
						
//要是提交json的格式的话还需要
var json ={"a1":a1}
						
//这样子转化一下，一个两个10个input还是可以接受的，但是实际开发中往往几十个 这样子就显得很笨重了，所以推荐方法二
						
//方法二：
var d = {};
var t = $(&#39;form&#39;).serializeArray(); // 默认是json 格式
						
//传统的for循环,将值打印出来
/*
console.info(t)
						
for (var i = 0;i<t.length;i++) {
console.info(t[i]);
d[t[i].name] =  t[i].value;
							
}
						
*/
						
//jQuery的循环
$.each(t, function() {
//console.info(t)
d[this.name] = this.value;
console.info(d)
}); 
						
console.info(JSON.stringify(t));   //从json对象解析出json字符串
var json_str = JSON.stringify(t);
						
console.info(JSON.stringify(d)); //从一个对象解析出字符串
});
});
</script>

Method one:

Use original js to obtain the value

Method 2:

Use jquery function library to obtain

Related recommendations:

How to js Get the selected value of the radio radio button

How to get the value and number of elements of the drop-down list in js

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