web前端js使用window.print()实现局部打印(自测可用)

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<div id="printPage">
    打印内容
</div>
<button class="btn-common btn-search" @click="btn_sendmsg" id="print-btn">打印</button>
var newstr = document.getElementById("printPage").innerHTML;//你要打印的id
var oldstr = document.body.innerHTML;
document.body.innerHTML = newstr;
window.print();

这样就可以了