如何在不看到 [object Object] 的情況下返回整個對象？

Question

此代碼更新對象屬性及其值，但是當我嘗試返回對象時，我的屏幕上出現 [object Object]。 如何返回整個對象？

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 //the javascript code const recordCollection = { 2548: { albumTitle: 'Slippery When Wet', artist: 'Bon Jovi', tracks: ['Let It Rock', 'You ive Love a Bad Name'] }, 2468: { albumTitle: '1999', artist: 'Prince', tracks: ['1999', 'Little Red Corvette'] }, 1245: { artist: 'Robert Palmer', tracks:[] }, 5439: { albumTitle: 'ABBA Gold' } } function updateRecords(records, id, prop, value) { let demo = document.getElementById('demo'); if (prop !== "tracks" && value !== "") { records[id][prop] = value; } else if (prop === "tracks" && records[id].hasOwnProperty("tracks") === false) { // let add = []; records[id][prop] == [value]; } else if (prop === "tracks" && value !== "") { records[id][prop].push(value); } else if (value === "") { delete records[id][prop]; } demo.innerHTML = records; return demo; } updateRecords(recordCollection, 5439, 'artist', 'ABBA');

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Answer 1

您必須在某個時候創建​​一個字符串。 JSON.stringify(records)是最接近打印對象的方法。

 //the javascript code const recordCollection = { 2548: { albumTitle: 'Slippery When Wet', artist: 'Bon Jovi', tracks: ['Let It Rock', 'You ive Love a Bad Name'] }, 2468: { albumTitle: '1999', artist: 'Prince', tracks: ['1999', 'Little Red Corvette'] }, 1245: { artist: 'Robert Palmer', tracks:[] }, 5439: { albumTitle: 'ABBA Gold' } } function updateRecords(records, id, prop, value) { let demo = document.getElementById('demo'); if (prop !== "tracks" && value !== "") { records[id][prop] = value; } else if (prop === "tracks" && records[id].hasOwnProperty("tracks") === false) { // let add = []; records[id][prop] == [value]; } else if (prop === "tracks" && value !== "") { records[id][prop].push(value); } else if (value === "") { delete records[id][prop]; } demo.innerHTML = JSON.stringify(records, null, 2); return demo; } updateRecords(recordCollection, 5439, 'artist', 'ABBA');

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