Javascript 从文件中修改json对象并保留结构
我们有一个json,其对象如下 之前的JSONJavascript 从文件中修改json对象并保留结构,javascript,node.js,json,typescript,abstract-syntax-tree,Javascript,Node.js,Json,Typescript,Abstract Syntax Tree,我们有一个json,其对象如下 之前的JSON // comment 1 { "version": "2.0.0", "tasks": [{ "type": "task1", "script": "watch", "problemMatcher": "$tsc-watch", "isBackground": true, "presentation": { "aaa": "nev
// comment 1
{
"version": "2.0.0",
"tasks": [{
"type": "task1",
"script": "watch",
"problemMatcher": "$tsc-watch",
"isBackground": true,
"presentation": {
"aaa": "never"
}
}]
}
// comment 2
JSON之后
现在我想将一个新对象添加到一个新任务(任务2)
这里的技巧是,我需要更新对象,而不改变结构、行或注释。我尝试使用jsonParse,但它不起作用
在javascript/nodejs中可能吗 我建议你去看看这个软件包,这就是它的设计目的,你不需要自己动手 您可以解析JSON,然后添加新任务并写入新文件:
const { parse, stringify} = require("comment-json");
const fs = require("fs");
const taskFile = parse(fs.readFileSync("./input.json", "utf8"));
let taskToAdd = {
"type": "task2",
"script": "watch",
"problemMatcher": "$tsc-watch",
"isBackground": true,
"presentation": {
"aaa": "never"
}
};
taskFile.tasks.push(taskToAdd);
fs.writeFileSync("./output.json", stringify(taskFile, null, 4));
input.json
// comment 1
{
"version": "2.0.0",
"tasks": [{
"type": "task1",
"script": "watch",
"problemMatcher": "$tsc-watch",
"isBackground": true,
"presentation": {
"aaa": "never"
}
}]
}
// comment 2
当然,如果您希望就地修改JSON文件,只需将输入和输出文件名设置为相同的值
// comment 1
{
"version": "2.0.0",
"tasks": [{
"type": "task1",
"script": "watch",
"problemMatcher": "$tsc-watch",
"isBackground": true,
"presentation": {
"aaa": "never"
}
}]
}
// comment 2