How to check, if a HTML5 input is supported?

Question

I want to check in my website, if the visitors browser support a HTML5 input type. How should I do it?

Answer 1

You could do:

function IsAttributeSupported(tagName, attrName) {
    var val = false;
    // Create element
    var input = document.createElement(tagName);
    // Check if attribute (attrName)
    // attribute exists
    if (attrName in input) {
        val = true;
    }
    // Delete "input" variable to
    // clear up its resources
    delete input;
    // Return detected value
    return val;
}

if (!IsAttributeSupported("input", "placeholder")) {
    // Do something special here
    alert("placeholder attribute is not supported");
}

Hope it helps