Js -----后台json数据，前端生成下载text文件

需要引入

<script src="/assets/libs/single_file/jquery.min.js"></script>
<script src="/assets/libs/layer/layer.js"></script>

借鉴 张鑫旭文章

http://www.zhangxinxu.com/wordpress/2017/07/js-text-string-download-as-html-json-file/

 // 返回错误信息弹框显示
    @if (session('point_errors'))
        var point_errors = JSON.stringify({!! session()->pull('point_errors') !!});
         point_errors = JSON.parse( point_errors );
        // console.log(point_errors);
        var text_content = '',msg = '',layer_content = '<p><input type="button" id="download_text" value="点击下载文件"></p>';
        $.each(point_errors, function(index, item) {
            // 组织text内容
            text_content += item[0] + ' ' + item[1] + ' ----'
                + item[2] + '
';

            msg = '<p style="padding:0;margin:0">'+item[1] + '['
                +  item[0] + ']----'
                +  item[2] + '</p>';
            layer_content += msg;
        });

        console.log(layer_content);
        console.log(text_content);

        // 下载文件方法
        var funDownload = function (content, filename) {
            var eleLink = document.createElement('a');
            eleLink.download = filename;
            eleLink.style.display = 'none';
            // 字符内容转变成blob地址
            var blob = new Blob([content]);
            eleLink.href = URL.createObjectURL(blob);
            // 触发点击
            document.body.appendChild(eleLink);
            eleLink.click();
            // 然后移除
            document.body.removeChild(eleLink);
        };

        if ('download' in document.createElement('a')) {
            // 作为test.html文件下载
            $(document).on('click', '#download_text', function () {
                funDownload(text_content, '导入失败的用户信息.text');
            });
        } else {
            $(document).on('click', '#download_text', function () {
                alert('浏览器不支持');
            });
        }

        setTimeout(function(){
            layer.open({
                type: 1,
                area: ['500px', '600px'],
                content: layer_content,
                scrollbar: true
            });
        }, 2000);
    @endif