js的复制文本功能-复制到黏贴板

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

static copyToClipboard = (str: string): void => {     const el = document.createElement('textarea');     el.value = str;     el.setAttribute('readonly', '');     el.style.position = 'absolute';     el.style.left = '-9999px';     document.body.appendChild(el);     const selected =         document.getSelection().rangeCount > 0         ? document.getSelection().getRangeAt(0)         : false;     el.select();     document.execCommand('copy');     document.body.removeChild(el);     if (selected) {         document.getSelection().removeAllRanges();         document.getSelection().addRange(selected);     }     successTip("复制成功"); };