功能 - 复制到剪切板

<button  value='xxx'  onclick='copyTextFunction(this)'>复制</button>

function copyTextFunction(obj) {
    obj=$(obj);
    let textToCopy = obj.val();
    navigator.clipboard.writeText(textToCopy).then(function() {
            console.log('复制成功');
        }).catch(function(error) {
            console.error('复制失败', error);
        });
  }