toregd.blogg.se - Java script input box

So, it should avoid overusing this method because it stops the user from accessing the other parts of the webpage until the box is closed. The prompt box takes the focus and forces the user to read the specified message.

Otherwise, it returns null on clicking "Cancel". When the user clicks "OK," the box returns the input value. Then I try to change the value of the input box by doing this: input.value 3 Then when I type 'input' into console.

When I type 'input' into console, here is what is returned: .

Currently, the value of the input box is '20'. It returns null or the string entered by the user. What I have done so far is create the variable for an input box. The prompt box consists of two buttons, OK and Cancel. The box is displayed using the prompt() method, which takes two arguments: The first argument is the label which displays in the text box, and the second argument is the default string, which displays in the textbox. When the prompt box pops up, we have to click "OK" or "Cancel" to proceed. It can be written without using the window prefix. It is generally used to take the input from the user before entering the page. The prompt() method in JavaScript is used to display a prompt box that prompts the user for the input. So, you can create a function that store value in object on keyup or keydown event.Ĭonsole.log(data.Next → ← prev JavaScript prompt() dialog box We need to write four lines to fetch the value of an input field. 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 Sets or returns the value of the autocomplete attribute of a text field.

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.

document.querySelector('input').value selected by tagname.

document.querySelector('.searchField').value selected by class.

document.querySelector('#searchTxt').value selected by id.

Use the powerful document.querySelector('selector').value which uses a CSS selector to select the element For example 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. 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. If the input is invalid, you can set the data-state to invalid.

const value () If the input is valid, you can set data-state to valid. 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. trim removes any whitespace from the front and back of a string. 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. 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