The question () method receives two parameters: The string question you want to ask your user.
#Java script input box code#
So, you can create a function that store value in object on keyup or keydown event.Ĭonsole.log(data. To ask for user input, you need to call the question () method from the Interface instance, which is assigned to rl variable on the code above. If it is valid, make the character valid and add to the input else not. Each time a character is entered, the whole input is matched with the RegExp to check validity. Approach 1: A RegExp to verify the input.
Sometimes we need to set a default value of the element, This example explains methods to do so. Here we are allowing only decimal and integers but not any other symbol. We need to write four lines to fetch the value of an input field. Set the value of an input field in JavaScript. Thenĭocument.getElementById('something').value is annoying. You can use onkeyup when you have more than one input field. document.querySelectorAll('').value selected by name.document.querySelectorAll('input').value selected by tagname.document.querySelectorAll('.searchField').value selected by class.document.querySelectorAll('#searchTxt').value selected by id.document.querySelector('').value selected by nameĭocument.querySelectorAll('selector').value which also uses a CSS selector to select elements, but it returns all elements with that selector as a static Nodelist.
As you can see, it contains a value called text, indicating the value of the. The second example can be used for setting the value of the property. JavaScript get value of input: textObject.value. The first one holds a code which will return the value of the property. Method 4ĭocument.getElementsByName('name').value which also >returns a live NodeList For exampleĭocument.getElementsByName("searchTxt").value if this is the first textbox with name 'searchtext' in your page. We have two examples of get input value JavaScript usage. Use document.getElementsByTagName('tag_name').value which also returns a live HTMLCollection For exampleĭocument.getElementsByTagName("input").value, if this is the first textbox in your page. Method 2ĭocument.getElementsB圜lassName('class_name').value which returns a Live HTMLCollection For exampleĭocument.getElementsB圜lassName("searchField").value if this is the first textbox in your page. For the first element, use ,įor the second one use, and so on. Note: Method 2,3,4 and 6 returns a collection of elements, so use to get the desired occurrence. getElementById ( “btn” ) ītn.There are various methods to get an input textbox value directly (without wrapping the input element inside a form element): Method 1ĭocument.getElementById('textbox_id').value to get the value ofĭocument.getElementById("searchTxt").value Now when you click on the OK button you will see the Hello! Nas message alert:Īnother method to create an input box in Javascript is to use an HTML input box and then reference that in JavaScript and get its value.Ĭonst btn = document. Let’s remove the Enter name and type your name: In the above JavaScript code, we called the prompt() method and asked the user to input his name. Var name = prompt ( “Enter your name”, “Enter name” )
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