How Can I Dynamically Update Placeholder Color with CSS Variables in JavaScript?

Updating Placeholder Color with CSS Variables in Javascript

JavaScript lacks a direct method for modifying placeholder color. However, CSS variables can be utilized to achieve this effect.

HTML Code:

<input type="text" placeholder="Placeholder" />
<button onclick="update()">Change Placeholder Color</button>

CSS Code:

::placeholder {
  color: var(--placeholder-color, red);
}

Javascript Code:

function update() {
  const placeholderColor = document.querySelector('#color-picker').value;
  const input = document.querySelector('input[type=text]');

  input.style.setProperty("--placeholder-color", placeholderColor);
}

In this script, the update() function retrieves the selected color from a color picker element and sets the value of the CSS variable --placeholder-color in the text input element. By referencing this variable in the CSS, the placeholder color is dynamically updated when the button is clicked.

Note:

• Be sure to include a color picker element in your HTML to enable users to select the new placeholder color.
• Using this technique, you can target specific placeholders by assigning unique CSS class names to the respective input elements.

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