Answer: Use the value PropertyYou can simply use the value property of the DOM input element to get the value of text input field.The following example will display the entered text in the input field on button
document.querySelector('.searchField').value;//通过类 class 获取 document.querySelector('input').value;//通过标签名获取 document.querySelector('[name="searchTxt"]').value;//通过 name 属性和值来获取 方法6 querySelectorAll 可以返回所有 CSS 选择器对于的元素,是一个 Nodelist。 document.querySe...
我们给 DOM 输入元素赋予id属性,然后用document.getElementById(id_name)来选择 DOM 输入元素,你可以直接使用value属性。 例子 <!DOCTYPE html><html><body><h4>Change the text of the text field,and then click the button.</h4><labelfor="domTextElement">Name:</label><inputtype="text"id="domText...
AI代码解释 <script>functioninit(){varmyButton=document.getElementById("myButton");varmyTextfield=document.getElementById("myTextfield");myButton.onclick=function(){varuserName=myTextfield.value;}}document.addEventListener('readystatechange',function(){if(document.readyState==="complete"){init();...
<script>functioninit(){varmyButton=document.getElementById("myButton");varmyTextfield=document.getElementById("myTextfield");myButton.onclick=function(){varuserName=myTextfield.value;}}document.addEventListener('readystatechange',function(){if(document.readyState==="complete"){init();}});</scr...
1<form>2<input type="text"name="zip"value="">3<input type="submit">4</form> 以下脚本检查用户输入的邮政编码是否有意义: 1<script>2varre =/^[0-9]{5}$/;3varfield ="12683";4varcheckzip = re.exec(feld);5if(!checkzip) {6alert("The zip code "+ checkplz +" is not correct....
上传文件的Form 里,浏览文件夹的Input Field 的属性和一般的input是不一样的,所以不能用getElementById取值。必须用: document.formName.id.value 来取值。 可以用它判断上传文件的类型,限制用户上传文件类型。 例子: 上传form: Code Javascript code:
Based on the above code, if there were 10 input elements, clickinganyof them would display “This is element #10”! This is because, by the timeonclickis invoked foranyof the elements, the aboveforloop will have completed and the value ofiwill already be 10 (forallof them). ...
有了字段名后,我们可以根据字段名来获取字段的值。Kettle提供了getInputRowMeta()函数用于获取输入流的元数据信息,包括字段名和字段类型。我们可以使用indexOfValue()函数来获取字段名对应的索引值,然后使用getString()函数来获取字段的值。 varinputRowMeta=getInputRowMeta();varfieldIndex=inputRowMeta.indexOfValue...
In this tutorial, we are going to learn about how to get an HTML element input field value using JavaScript. Consider we have an element…