Question

我正在尝试在HTML元素中编写一些输入并使用JS获取输入文本，然后使用AJAX将值发送到另一个文件，但它不起作用，我只得到“null”作为结果

有原因吗？

这是我的HTML

<button type="button" onclick="loadDoc()">Value</button>
     <input type="number" class="test" id="test" name="test" value="" style="width:10%" >
     <div id="mostraAttuale"></div>
    </br>

这是我的JS功能

function loadDoc() {
    var value = document.getElementById("test");
    alert(value);
    var url = <?php echo json_encode($test); ?>;
    var email = <?php echo json_encode($mail); ?>;
    var valuereq = new XMLHttpRequest();
    valuereq.open("GET", url+'?email='+email+'&value='+value, true);
    valuereq.send();
    valuereq.status;
    valuereq.onreadystatechange = function () {
        if (valuereq.readyState == 4 && valuereq.status == 200) {
            var return_data = valuereq.responseText;
            document.getElementById("mostraAttuale").innerHTML = "ultimo valore inserito: " + return_data;
        }
        else document.getElementById("mostraAttuale").innerHTML = valuereq.status;
    }
    document.getElementById("test").value="";
}

提前谢谢。

Answer 1

试试这个：

function loadDoc() {
    var value = document.getElementById("test").value;
    alert(value);
    var url = "<?=json_encode($test) ?>";
    var email = "<?=json_encode($mail) ?>";
    var valuereq = new XMLHttpRequest();
    valuereq.open("GET", url+'?email='+email+'&value='+value, true);
    valuereq.send();
    valuereq.status;
    valuereq.onreadystatechange = function () {
      if (valuereq.readyState == 4 && valuereq.status == 200) {
          var return_data = valuereq.responseText;
          document.getElementById("mostraAttuale").innerHTML = "ultimo valore inserito: " + return_data;
      }
      else 
         document.getElementById("mostraAttuale").innerHTML = valuereq.status;
    }
    document.getElementById("test").value="";
}

Answer 2

行var function Test-GroupMembership { Param( [Parameter(Mandatory=$true)] [string]$Identity, [Parameter(Mandatory=$true)] [string]$Name ) $groups = Get-ADPrincipalGroupMembership -Identity $Identity if ($groups | Where-Object { $_.Name -like $Name }) { return $true } elseif ($groups -ne $null) { foreach ($g in $groups) { if (Test-GroupMembership -Identity $g -Name $Name) { return $true } } } return $false }没有获得值，而是“HTMLInputElement”。替换为：

value = document.getElementById("test");

获取输入值javascript

2 个答案: