Add Button component without icons

[MAILPOET-2771]

assets/js/src/common/button/button.tsx

@@ -0,0 +1,42 @@
+import React from 'react';
+import classnames from 'classnames';
+
+type Props = {
+  children: React.ReactNode,
+  size?: 'small' | 'large',
+  variant?: 'light' | 'dark' | 'link' | 'link-dark',
+  isLoading?: boolean,
+  isFullWidth?: boolean,
+  onClick?: () => void,
+  href?: string,
+};
+
+const Button = ({
+  children,
+  size,
+  variant,
+  isLoading,
+  isFullWidth,
+  onClick,
+  href,
+}: Props) => (
+  <a
+    href={href}
+    onClick={onClick}
+    className={
+      classnames(
+        'mailpoet-button',
+        {
+          [`mailpoet-button-${size}`]: size,
+          [`mailpoet-button-${variant}`]: variant,
+          'mailpoet-button-loading': isLoading,
+          'mailpoet-full-width': isFullWidth,
+        }
+      )
+    }
+  >
+    <span>{children}</span>
+  </a>
+);
+
+export default Button;