qrcodejs2生成二维码

qrcodejs2可以通过两种方式生成二维码。第一种方式是使用`this.$refs.qrcode.innerHTML = '';`来清除之前生成的二维码，然后使用`qrcode.makeCode("http://naver.com");`来生成新的二维码。第二种方式是使用`this.qrcode.clear();`来清除之前生成的二维码，然后再使用`qrcode.makeCode("http://naver.com");`来生成新的二维码。<span class="em">1</span><span class="em">2</span>
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