JS实现浏览器点击下载图片功能案例分析【亲测有效】

<!-- 文件名为默认名称 -->
<a href="./baidu_jgylogo3.gif" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  download />
<!-- 文件名为baidu.gif -->
<a href="./baidu_jgylogo3.gif" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  download="baidu" />
<!-- 文件名为baidu.png -->
<a href="./baidu_jgylogo3.gif" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  download="baidu.png" />

var x=new XMLHttpRequest();
    x.open("GET", "http://danml.com/wave2.gif", true);
    x.responseType = 'blob';
    x.onload=function(e){
        var url = window.URL.createObjectURL(x.response)
        var a = document.createElement('a');
        a.href = url
        a.download = ''
        a.click()
    }
    x.send();

<a href="http://192.168.1.8:8088/imgtmp/202304191632188702.png" rel="external nofollow" 
onclick="saveas(this.href,'202304191632188702.png');" target="_blank">
202304191632188702.png
</a>

window.saveas = function(img,filename){
    event.returnValue = false;
    let x=new XMLHttpRequest();
    x.open("GET", img, true);
    x.responseType = 'blob';
    x.onload=function(e){
        let url = window.URL.createObjectURL(x.response);
        let a = document.createElement('a');
        a.href = url
        a.download = filename
        a.click()
    }
    x.send();

  }