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Check if the browser supports for an element attribute

Written byPhuoc Nguyen
Category
Trick
Tags
DOM, JavaScript
Created
24 Feb, 2021
We can detect if the current browser supports for given attribute, `pattern` for example, as following:
const isPatternSupported = 'pattern' in document.createElement('input');
If you would like to check for the value of attribute, it takes more steps. The sample code below determines whether the native date input is supported:
const isDateInputSupported = () => {
// Create new input element
const ele = document.createElement('input');

// Set the type attribute
ele.setAttribute('type', 'date');

const invalidValue = 'not-a-valid-date';

// Set an invalid value
ele.setAttribute('value', invalidValue);

return ele.value !== invalidValue;
};
If the browser supports the date input, invoking `setAttribute` with an invalid date won't have effect on the `value` attribute. As a result, `ele.value` will be an empty string.
Otherwise, the input is treated as normal text input and `ele.value` returns the original value.

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Phước Nguyễn