json string format display

layer.open({
             type: 1,
             skin:'layui-layer-demo', //
             closeBtn: 1, //Do not display the close button
             anim: 2,
             shadeClose: true, //Turn on the mask to close
             content: '<pre style="padding: 10px;">' + JSON.stringify(jsonstr, null, 5) + '</pre>',
             area: ['600px', '400px']
 });

Solution: JSON.stringify() method: Convert the json object to a json string, 5: means that there are 5 spaces indented by up to 10, but it is found that all the strings printed are still connected, because html ignores spaces Or tab, just use <pre></pre> tags.