一、步骤

<div class="home>
	<el-button v-show="isShowBtn" @click="downloadWithBlob(bigImg)">点击下载大图</el-button>
</div>

script:

downloadWithBlob(url, name) {
    fetch(url.src).then(res => res.blob().then(blob => {
        var a = document.createElement('a');
        var url = window.URL.createObjectURL(blob);
        var filename = name || '';
        a.href = url;
        a.download = filename;
        a.click();
        window.URL.revokeObjectURL(url);
    }));
},

觉得有用就收藏一下吧，不然下次会找不到了哟^ _ ^