JSFiddle - React, Tailwind, and code Playground

JavaScript

var json = {"line":[{"type":"bank","name":"ABN","account":"NL47ABNA0442660960","description":"Bijgewerkt t\/m 30-10-2014","balance":"6.266,55","image":""},{"type":"bank","name":"Rabo","account":"NL89RABO0177896647","description":"","balance":"0,00","image":""}],"total":"6.266,55"};

if(json.line !== undefined && json.line.length > 0){
    var key,value;
    json.line.map(function(lineObject){        
        for (key in lineObject) {
            value = (lineObject[key] == '')?'unknown': lineObject[key];
            console.log(key+":"+ value);
        }
        console.log("---------------------");
    });
}