Cocos Creator JS web平台复制粘贴代码（亲测可用）

Cocos Creator JS web平台复制粘贴代码（亲测可用）

 1 webCopyString: function(str){
         var input = str;
         const el = document.createElement('textarea');
         el.value = input;
         el.setAttribute('readonly', '');
         el.style.contain = 'strict';
         el.style.position = 'absolute';
         el.style.left = '-9999px';
         el.style.fontSize = '12pt'; // Prevent zooming on iOS

         const selection = getSelection();
         var originalRange = false;
         if (selection.rangeCount > 0) {
             originalRange = selection.getRangeAt(0);
         }
         document.body.appendChild(el);
         el.select();
         el.selectionStart = 0;
         el.selectionEnd = input.length;

         var success = false;
         try {
             success = document.execCommand('copy');
         } catch (err) {}

         document.body.removeChild(el);

         if (originalRange) {
             selection.removeAllRanges();
             selection.addRange(originalRange);
         }

         return success;
     },