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Showing content from http://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/value below:

HTMLInputElement: value property - Web APIs

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The value property of the HTMLInputElement interface represents the current value of the <input> element as a string.

This property can also be set directly, for example to set a default value based on some condition.

A string specifying the default value of the <input> element.

In this example, the log displays the current value as the user enters data into the input.

We include an <input> and an associated <label>, with a <pre> container for our output.

<label for="given-name">Your name:</label>

<input name="given-name" id="given-name" />

<pre id="log"></pre>

The <pre> element's innerText is updated to the current value of the <input> every time a keyup event is fired.

const logElement = document.getElementById("log");
const inputElement = document.getElementById("given-name");

inputElement.addEventListener("keyup", () => {
  logElement.innerText = `Name: ${inputElement.value}`;
});

#log {
  height: 20px;
  padding: 0.5rem;
  background-color: #ededed;
}

This example demonstrates that the value property with an <input> of type color.

We include an <input> of type color:

<label for="color">Pick a color:</label>

<input name="color" id="color" type="color" />

<pre id="log"></pre>

The <pre> element's innerText is updated with the default color value (#000000) and then updated every time a change event is fired.

const logElement = document.getElementById("log");
const inputElement = document.getElementById("color");

logElement.innerText = `Color: ${inputElement.value}`;

inputElement.addEventListener("change", () => {
  logElement.innerText = `Color: ${inputElement.value}`;
});

#log {
  height: 20px;
  padding: 0.5rem;
  background-color: #ededed;
}

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