Cocos Creator JS web平台复制粘贴代码（亲测可用）  1 webCopyString: function(str){ 2         var input = str; 3         const el = document.createElement('textarea'); 4         el.value = input; 5         el.setAttribute('readonly', ''); 6         el.style.contain = 'strict'; 7         el.style.position = 'absolute'; 8         el.style.left = '-9999px'; 9         el.style.fontSize = '12pt'; // Prevent zooming on iOS10 11         const selection = getSelection();12         var originalRange = false;13         if (selection.rangeCount > 0) {14             originalRange = selection.getRangeAt(0);15         }16         document.body.appendChild(el);17         el.select();18         el.selectionStart = 0;19         el.selectionEnd = input.length;20 21         var success = false;22         try {23             success = document.execCommand('copy');24         } catch (err) {}25 26         document.body.removeChild(el);27 28         if (originalRange) {29             selection.removeAllRanges();30             selection.addRange(originalRange);31         }32 33         return success;34     },