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How to add and remove input fields dynamically using jQuery with Bootstrap?
In proportion to the development of intricate and user-focused web applications, the capability to append and discard input fields dynamically has gained vital importance for developers. By amalgamating the influential abilities of jQuery and Bootstrap, developers can create responsive user interfaces that acknowledge user input instantly. The course of action for adding and removing input fields dynamically by means of jQuery and Bootstrap might seem daunting; however, with a profound comprehension of the inherent syntax and parameters, it can be executed with effortless ease. This paper delves into a step-by-step approach to adding and removing input fields dynamically with the assistance of jQuery in conjunction with Bootstrap, encompassing diverse options for customization that are available to developers throughout the process.
Syntax
$(selector).click(function);
In the domain of jQuery, the method of 'click' associates an event handler with the JavaScript event of "click" or instigates the occurrence of that event on a specific element.
$(selector).append(content)
The method of .append() present in jQuery is employed to append substance towards the finale of a particular element. This method has the capability to incorporate HTML, text, or other elements inside the chosen element.
$(selector).remove();
The method .remove() present in jQuery framework has the ability to delete the preferred elements, together with any connected child nodes and content from the Document Object Model (DOM). Additionally, this method has the capability to get rid of the correlated event handlers and data that are associated with the removed elements. After the successful execution of this method, the targeted elements are eradicated from the DOM and, therefore, cannot be further accessed or controlled. The method can be triggered on a jQuery object that encompasses one or numerous preferred elements.
$(selector).parent();
In jQuery, the parent() method selects the immediate parent element of the selected element(s). It can be used to traverse the DOM tree and select a specific parent element based on its relationship to the selected element(s).
Approach
We shall utilize the above-mentioned procedures of jQuery, namely the .append() and .remove() techniques, to incorporate and eliminate input fields dynamically while incorporating the Bootstrap framework. To append an input field, we shall make use of the .append() method, and to eliminate it, we shall call the .remove() method. Moreover, we shall make use of two more methods, namely .click() and .parent(), to manage the onclick event and to locate the element's ancestor, respectively.
Example
The following example comprises of a form that consists of an unfilled div container, a button to "Remove Input", and another button to "Add Input". At the outset, the "Remove Input" button is not operational. On clicking the "Add Input" button, a new input field is incorporated dynamically to the div by means of the append() function, and the "Remove Input" button is enabled. For erasing an input field, the "Remove Input" button is clicked, and the ancestor element (i.e., the input field) is selected and eliminated from the Document Object Model (DOM) by utilizing the parent() and remove() functions. The code's script part employs jQuery to realize this functionality.
<!DOCTYPE html>
<html>
<head>
<title>How to add and remove input fields dynamically using jQuery with Bootstrap?</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<h4>How to add and remove input fields dynamically using jQuery with Bootstrap?</h4>
<form>
<div class="form-group" id="input-container"></div>
<br/>
<button class="remove-input">Remove Input</button>
</form>
<br/>
<button id="add-input">Add Input</button>
<script>
$("#add-input").click(function () {
$("#input-container").append('<input type="text" class="form-control">');
});
$(".remove-input").click(function () {
$(this).parent().remove();
});
</script>
</body>
</html>
Conclusion
To conclude, the incorporation of dynamic input field addition and elimination using jQuery with Bootstrap can remarkably ameliorate user experience and optimize the data gathering procedure on a website or application. By implementing the procedures expounded in this article, programmers can design forms that are flexible and adjustable to the prerequisites of their users. The competence to attach or detach fields on-the-go enables users to conveniently input the required information, without being encumbered by extraneous input possibilities. Integrating these methods into your development workflow can yield a more effectual and user-friendly website or application, which, in turn, results in a more favorable user experience.
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