1. 概念
JSON 只是一种数据格式，JSON 对象中的 key 必须用双引号包裹，如下：
{ "name": "yqcoder" }
2. 对象字面量转 JSON 字符串对象
let yqcoder = { name: "yqcoder", }; JSON.stringify(yqcoder); // '{"name":"yqcoder"}' // 两次 JSON.stringify 加 \\ let _yqcoder = { name: "yqcoder", _name: '{"name":"yqcoder"}', }; JSON.stringify(_yqcoder); // '{"name":"yqcoder","_name":"{\\"name\\":\\"yqcoder\\"}"}' // 三次 JSON.stringify 加 \\\\\\ let __yqcoder = { name: "yqcoder", _name: '{"name":"yqcoder"}', __name: '{"name":"yqcoder","_name":"{\\"name\\":\\"yqcoder\\"}"}', }; JSON.stringify(__yqcoder); // '{"name":"yqcoder","_name":"{\\"name\\":\\"yqcoder\\"}","__name":"{\\"name\\":\\"yqcoder\\",\\"_name\\":\\"{\\\\\\"name\\\\\\":\\\\\\"yqcoder\\\\\\"}\\"}"}'
3. JSON 过滤
// 通过JSON删除 love，thr let yqcoder = { name: "yq", age: 18, love: "dyb", thr: "aa", }; JSON.stringify(yqcoder, ["name", "age"]); // '{"name":"yq","age":18}' JSON.stringify(yqcoder, (key, value) => { if (["love", "thr"].includes(key)) { return undefined; } else { return value; } }); // '{"name":"yq","age":18}'
