如何检测Web Share Target API的可用性？

Question

如果Web Share Target API可用，我想教给用户不同的流程。有没有办法检测它是否可用？

Answer 1

if (navigator.share === undefined) {
    console.log('Error: Unsupported  feature: navigator.share');
}

if (navigator.share === undefined) {
   alert('Error: Unsupported  feature: navigator.share');
}