HTML5 input placeholder adapts its size and position dynamically as data is being

During my interaction with the input fields on my bank's website, I noticed that the placeholder text undergoes a unique transformation. It shrinks in size and moves to the upper-left corner of the input field while I am entering information. Unlike typical placeholders that completely disappear, this feature proves to be incredibly helpful for users as it allows them to constantly view the questions they are answering. I am seeking suggestions on the most effective way to incorporate this functionality into my own web design.

javascriptjquerycsshtml

Answer №2

Implement the onchange event in JavaScript:

Here is an example of an HTML form that utilizes the onchange event:

<form id="myForm">
<input type="text" onchange="modifyForm(this)" id="textInput">
</form>

The corresponding JavaScript function can be seen below:

function modifyForm(element) {
element[0].setAttribute("style", "height: 50px");
}

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