未捕获的TypeError:无法将属性'value'设置为null [英] Uncaught TypeError: Cannot set property 'value' of null

问题描述

我正在尝试使用ajax请求将输入的文本传递给控制器​​.但是当我尝试执行JS文件时，我遇到了一个错误"Uncaught TypeError:无法将属性'value'设置为null".

I'm trying to pass the entered text to the controller using an ajax request. But i'm getting athe error "Uncaught TypeError: Cannot set property 'value' of null " when I tried to execute JS file..

这是HTMLcode:

Here is the HTMLcode:

<form action="">
    <input type="text" class="searchbox1" name="search" placeholder="Search for Brand, Store or an Item..." value="text" />
    <input type="button" class="searchbox_submit1" name="submit" value="text" onClick="javascript:getSearchText();">
</form>

这是JS代码:

function getSearchText() {
    var searchText = document.getElementByName("search").value;
    h_url=document.getElementById("u").value;
    var theURL = h_url+'search_all/' + deptid + '/' + searchText + '/1';
    $.ajax({
        url : theURL,
        fail: function(){
        },
        success : function() {
        },
        error:function(){
        }
    });
}

请帮助我解决此问题.

推荐答案

您没有ID为u的元素.这就是发生错误的原因. 请注意，全局变量document.getElementById("u").value表示您试图获取名称为u且未在代码中定义的输入元素的值.

You don't have an element with the id u.That's why the error occurs. Note that the global variable document.getElementById("u").value means you are trying to get the value of input element with name u and its not defined in your code.

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