_getDefaultValue(domElement) {
        // Get the default html value
        // Note: we do not use the simpler `return domElement.defaultValue;` code since the given domElement can sometime be a `contenteditable` element which does not support the `defaultValue` attribute.
        const value = domElement.getAttribute('value');

        if (AutoNumericHelper.isNull(value)) {
            return '';
        }

        return value;
    }
Get the default value from the html `value` attribute.
Return the empty string if such attribute is not found.

@param {HTMLElement} domElement

@returns {string}
@private