How to get element value in javascript

how to get element value in javascript

Get HTML Tag Values With JavaScript

value property in java script is only for returning values of the tag used for "forms" such as input tag. What you wanna do is use innerHTML property which returns the value of content inside the html tag. Jan 13,  · The JavaScript getElementByName () is a dom method to allows you to select an element by its name. The following syntax to represents the getElementsByName () method: 1 let elements = chesapeakecharge.commentsByName (name);Estimated Reading Time: 2 mins.

Through this article, you will get the answers to the following questions. What is JavaScript? What is the use of JavaScript JS? How to enable JavaScript?

How to comment in JavaScript? Why JavaScript validation client-side egt How to pass the parameter into a JavaScript function? JavaScript is weakly typed, object-oriented, and dynamic language. It's lightweight and all modern browsers are built in a JavaScript engine. It is mostly used for interaction with client-side leement. You can get and set the values of DOM objects easily and the beauty of JS is that there is no additional plugin or extension required to implement or uses for JS.

The majority of all languages have two types of comments: Single line comment. Multi-line comment. JavaScript is a client-side scripting language that runs on the client browser.

Using client-side validation reduces the load on the server-side and reduces unnecessary round-trips. Example The above can be validated with JavaScript client-side with the following points. Name field textbox The user entered text or not, in the textbox. Can put restriction; only alphabet characters allowed in Minimum Length eleemnt.

Mobile field textbox The user entered or not, in the textbox. Can put restriction; only numeric character allowed in the textbox. Minimum length requirement. Birth-Date field textbox Valid date entered or not, in the textbox. Date format restriction. Gender dropdownlist User-selected or not. Hide or display item. The parameter is the value that is used inside the function to do the processing. Passing the parameter s to the JavaScript function is very simple. In the sample code, you will see this in detail.

View All. Manoj Kalla Updated date May 29, The user entered or not, in the textbox. Valid date entered or not, in the textbox. To get Value of H1 Tag Alert document. To set Value of H1 Tag document. Next Recommended What is the meaning mutual. Classes And Objects. NET Core.

Definition and Usage

Mar 26,  · There are several methods are used to get an input textbox value without wrapping the input element inside a form element. Let’s show you each of them separately and point the differences. The first method uses chesapeakecharge.commentById ('textboxId').value to get the value of the box: chesapeakecharge.commentById ("inputId").value;Estimated Reading Time: 2 mins. If you want to find all HTML elements that match a specified CSS selector (id, class names, types, attributes, values of attributes, etc), use the querySelectorAll () method. This example returns a list of all elements with class="intro". To get the value of the text input element, we can use the value property of the text input object: text_val =; As an example, if we have the following text input element.

As we have seen in earlier articles , in order to work with forms in JavaScript, it is imperative to obtain references to the form object and its elements. In this article, we will be using the forms collection of the document object and the elements collection of the form object to set the values of the form elements.

The syntax for accessing the form object is as below:. Both approaches give us a reference to the desired form element. If we are accessing the form object through any of the form's elements itself, we can also use the following code:. You must have also noticed that this initial message does not re-appear even after the focus is removed and again given to this field. We do this by writing an onFocus event handler for the textarea element.

The code below is generic, that can be used for other fields like the text input field as well:. Thereafter, on subsequent focus, this counter increments. The value of the textarea is reset only the first time the textarea field gets focus, by setting its value attribute to the empty string. Download the code. In order to set the value of a text input field element in a form, we can use the following code:. Let us look at an example to illustrate how to set the value of the text input element through javascript.

Have a look at the way the HTML is coded:. We now need to write a javascript function that can serve as the onClick event handler of the two buttons:. The function isEmpty checks whether the value of the text input field is empty or not, and the function isInteger checks if the value is an integer.

If all these tests return true, we increment the value using the construct: txtElement. Have a look at the code sample for the implementation of these functions. Home Javascript Form.

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