复制的实现

//复制到剪贴板

clipboard(val) {

let result = 0;

let textArea = document.createElement('textArea');

textArea.value = val;

document.body.appendChild(textArea);

if (navigator.userAgent.match(/ipad|iphone/i)) {

let range = document.createRange();

range.selectNodeContents(textArea);

let selection = window.getSelection();

selection.removeAllRanges();

selection.addRange(range);

textArea.setSelectionRange(0, 999999);

} else {

textArea.select();

}

try { document.execCommand("Copy") && (result = 1) } catch (err) { }

document.body.removeChild(textArea);

return result;

},