javascript - 搜索对象并获取等于某个键的项目

Question

我想循环遍历以下 json 并获取其键等于 ID 的一个。

{
    "519c5056af2863f1d0341788357ebb81": {
        "downloadUrl": "2F519c5056af2863f1d0341788357ebb81%2F519c5056af2863f1d0341788357ebb81?alt=media&token=f50d9b0f-579a-4c81-b12b-35ee7e6810e2",
        "file_dislikes": 0,
        "file_likes": 0,
        "file_status": "Public",
        "filename": "Another testing video",
        "upload_date": "2016-09-03T04:48:04.283Z",
        "user_id": "14nWy7qG6vN7rNdquzZNhX1QvbH2",
        "video_avatar": "./images/video.jpg"
    },
    "99eed0bcc07d23f828c44c1721433c69": {
        "downloadUrl": "2F99eed0bcc07d23f828c44c1721433c69%2F99eed0bcc07d23f828c44c1721433c69?alt=media&token=d9251647-567e-49df-b0da-d9525e10ed0e",
        "file_dislikes": 0,
        "file_likes": 0,
        "file_status": "Public",
        "filename": "Zac Brown Band - Sweet Annie ",
        "upload_date": "2016-09-03T04:22:06.285Z",
        "user_id": "14nWy7qG6vN7rNdquzZNhX1QvbH2",
        "video_avatar": "./images/video.jpg"
    }
}

我想要获取 key 等于 519c5056af2863f1d0341788357ebb81 的项目，以便我可以在我的 html 中显示它，例如 video.filename、video.video_avatar。

Answer 1

您可以使用jQuery.each迭代 JSON 对象

jQuery.each(json, function(key, value) { 
    if (key == "519c5056af2863f1d0341788357ebb81") {
        console.log(value);
    }
} );

要访问普通 JS 对象的字段，您只需使用 []

 console.log(object["519c5056af2863f1d0341788357ebb81"]);