jquery上传图片自定义压缩大小/质量插件

使用方法

$("#file").resizeImg(function(){
        let type, quality;
        switch ($("#format").get(0).selectedIndex) {
            case 0:
                type = "image/jpeg";
                quality = 1;
                break;
            case 1:
                type = "image/jpeg";
                quality = 0.8;
                break;
            case 2:
                type = "image/jpeg";
                quality = 0.6;
                break;
            case 3:
                type = "image/png";
                quality = 1;
                break;
            default:
                type = "image/jpeg";
                quality = 0.8;
        }
        return {
            use_reader: false,
            mode: $("#mode").get(0).selectedIndex,
            val: $("#mode_"+$("#mode").get(0).selectedIndex).val(),
            type: type,
            quality: quality,
            callback: function(result) {
                $("#showImg").attr('src', result);
                $("#img_data").removeClass("d-none").val(result.substr(result.indexOf(',') + 1 )).css("height",100);
                console.log($("#img_data").val().length);
            }
        };
});