Question

我在html文件中有此表格。

<!DOCTYPE html>
    <html lang="en">
    <head>
    <meta charset="UTF-8">
    <link href='https://fonts.googleapis.com/css? 
    family=Playfair+Display:400,400italic,700,700italic' rel='stylesheet' 
    type='text/css'>
    <TITLE>Test Input</TITLE>
    </head>
    <body>  
       <form name="compoundSearchForm" id="compoundSearchForm" action="#" 
       method="POST"  onsubmit="return validateForm(this.form)">
       <h1 id="header1"></h1>
       <section>
       <fieldset>
       <div><label for="CAS">CAS NO</label>
       <input type="RADIO" id="CAS" name="identifier" value="CAS" checked></div>
       <div><label for="inchikey">InChiKeys</label>
       <input type="RADIO" id="inchikey" name="identifier" value="inchikey"> 
       </div>
       <div><label for="smiles">SMILES</label>
       <input type="RADIO" id="smiles" name="identifier" value="smiles"></div>
       <div><label for="keyword">Keyword</label>
       <input type="RADIO" id="keyword" name="identifier" value="name"></div>
       <textarea id='userInput' type='textarea' name="userInput" Enter your 
       rows="15" cols="60" wrap="virtual">Enter your search here...</textarea> 
       <br/>
       <button type="reset">RESET</button>
       <button type="submit" name="compoundSearchButton" 
       id="compoundSearchButton" value="SEARCH" style="margin-right: 15px;" 
       >Search</button>
       </fieldset>
       </section>
    </form>
    <script type="text/javascript" src="bundle.js"></script>
    <script type="text/javascript" src="main.js"></script>
    <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
    </body>
    </html>

main.js包含我的JavaScript代码。 bundle.js用于browserify。这是main.js文件的内容

//for radio buttons, get checked value
function identifierChecked(fieldName) {
  console.log(fieldName);
  var checkedValue;
  for(var x=0;x<fieldName.length;x++) {
    if(fieldName[x].checked) {
      checkedValue=fieldName[x].value;
      //console.log(checkedValue);
    }
   }
  return checkedValue;
}
let selectedIdentifier;
document.getElementById('compoundSearchForm').onclick = function (){
  selectedIdentifier=identifierChecked(document.getElementsByName('identifier'));
  console.log(selectedIdentifier); 
}

var inputValue=document.getElementById('userInput').value;
console.log(inputValue);
function validateForm (){ //enter code here }
validateForm();

提交表单后，我似乎无法传递文本区域（inputValue）和单选按钮（selectedIdentifier）的变量的确切值。缺少什么或我做错了什么？

请注意，我所有的js文件都在nodejs服务器上执行。谢谢。

Answer 1

下面的示例向您展示如何从单选按钮和文本区域中获取的值。它将值放在表格下方的div中以显示结果：

function validateForm() {
  var identifier = document.getElementsByName("identifier");
  for (var x = 0; x < identifier.length; x++) {
    if (identifier[x].checked) {
      formResults.innerHTML = identifier[x].value;
    }
  }
  formResults.innerHTML = formResults.innerHTML + " , " + userInput.value;
  return false;
}

<form name="compoundSearchForm" id="compoundSearchForm" action="#" method="POST" onsubmit="return validateForm(this.form)">
  <h1 id="header1"></h1>
  <section>
    <fieldset>
      <div><label for="CAS">CAS NO</label>
        <input type="RADIO" id="CAS" name="identifier" value="CAS" checked></div>
      <div><label for="inchikey">InChiKeys</label>
        <input type="RADIO" id="inchikey" name="identifier" value="inchikey">
      </div>
      <div><label for="smiles">SMILES</label>
        <input type="RADIO" id="smiles" name="identifier" value="smiles"></div>
      <div><label for="keyword">Keyword</label>
        <input type="RADIO" id="keyword" name="identifier" value="name"></div>
      <textarea id="userInput" type="textarea" name="userInput" rows="15" cols="60" wrap="virtual">Enter your search here...</textarea>
      <br/>
      <button type="submit" name="compoundSearchButton" id="compoundSearchButton" value="SEARCH" style="margin-right: 15px;">Search</button>
    </fieldset>
  </section>
</form>
<div id="formResults" style="background-color: coral"></div>

似乎无法通过JavaScript形式传递变量

1 个答案: